http://www.rssboard.org/rss-specification 720 https://escholarship.org/uc/lbnl_ps_en/rss Recent eScholarship items from Engineering Mon, 2 Nov 2026 02:46:21 +0000 https://escholarship.org/uc/item/1g6012ds DUNE (Deep Underground Neutrino Experiment) is a long-baseline neutrino oscillation experiment currently under construction, whose far detectors will be the largest liquid argon time projection chambers ever built. This detector design calls for custom-built cryogenic front-end electronics to meet its performance requirements. This paper describes the charge readout electronics that will be used in the DUNE horizontal drift (HD) far detector and presents performance results using data from the ProtoDUNE-HD detector, a 770 ton liquid argon time projection chamber operated at the CERN Neutrino Platform in 2024 that served as the final prototype of the DUNE HD design. https://escholarship.org/uc/item/1g6012ds Mon, 26 Oct 2026 00:00:00 +0000 Abbaslu, S Alrahman, F Abd Abud, A Abed Acciarri, R Accorsi, LP Acero, MA Adames, MR Adamov, G Adamowski, M Adhikari, K Adriano, C Agudelo-Jaramillo, K Akbar, F Alemanno, F Alex, NS Soplin, L Aliaga Alqaisi, A Alrashed, M Alton, A Alvarez, R Alves, T Aman, A Amar, H Amarinei, R Amedo, P Amorim, EPM Anderson, J Andrade, DA Andreopoulos, C Andreotti, M Andrews, MP Andrianala, F Andringa, S Anjarazafy, F Ansarifard, S Antic, D Antonakis, A Aranda-Fernandez, A Araya-Santander, T Arellano, L Diaz, E Arrieta Arroyave, MA Pons, M Artero Asaadi, J Ascencio, M Ashkenazi, A Asquith, L Atkin, E Auguste, D Aurisano, A Aushev, V Autiero, D Gómez, D Ávila Azam, MB Azfar, F Back, JJ Bae, Y Bagaturia, I Bagby, L Bagdu, H Balasubramanian, S Balboni, A Baldi, P https://orcid.org/0000-0003-0636-7930 Baldini, W Baldo, E Baldonedo, J Baller, B Bambah, B Barao, F Barbu, D Barenboim, G Alzás, P Barham Barker, GJ Barkhouse, W Yucel, E Barlas Barr, G Barrett, W Barrow, D Barrow, JL Basharina-Freshville, A Bashyal, A Basque, V Bassani, M Basu, D Bathe-Peters, L Sigolo, JG Batista Battat, JBR Battisti, F Bautista, J Bay, F Alba, JLL Bazo Beacom, JF Bechetoille, E Beever, A Behera, B Belchior, E Bell, B Bell, G Bellantoni, L Bellettini, G https://escholarship.org/uc/item/7z13523r Context. The growing volume of spectroscopic data in modern surveys motivates the development of data-driven approaches that complement traditional emission-line diagnostics for the identification of active galactic nuclei (AGNs). Aims. We develop and validate a machine-learning (ML) framework for galaxy and AGN classification that exploits the full optical spectrum, using unsupervised learning to capture spectral features within a semi-supervised classification framework that complements classical approaches. Methods. We adapted the SPENDER autoencoder architecture to compress galaxy spectra obtained with the Dark Energy Spectroscopic Instrument (DESI) into a low-dimensional latent space that encodes physically meaningful label-agnostic information. We introduced a quantitative classification method via a k-d tree nearest-neighbor search in latent space. The model was trained on 50 222 spectra from the DESI main survey, corresponding to the internal Guadalupe dataset, released... https://escholarship.org/uc/item/7z13523r Tue, 20 Oct 2026 00:00:00 +0000 Alcolea, JA Siudek, M Eriksen, M Mezcua, M Pucha, R Juneau, S Gontcho, S Gontcho A Panda, S Aguilar, J Ahlen, S Bianchi, D Brodzeller, A Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A de la Macorra, A Dey, B Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Hahn, C Herrera-Alcantar, HK Joyce, R Kehoe, R Kirkby, D Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M Le Guillou, L Meisner, A Miquel, R Moustakas, J Nadathur, S Percival, W Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlafly, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/5m33q3jk Galaxy clustering constrains the baryon fraction Ωb/Ωm through the amplitude of baryon acoustic oscillations and the suppression of perturbations entering the horizon before recombination. This produces a different prerecombination distribution of baryons and dark matter. After recombination, the gravitational potential responds to both components in proportion to their mass, allowing robust measurement of the baryon fraction. This is independent of new-physics scenarios altering the recombination background (e.g. early dark energy). The accuracy of such measurements does, however, depend on how baryons and cold dark matter (CDM) are modeled in the power spectrum. Previous template-based splitting relied on approximate transfer functions that neglected part of information. We present a new method that embeds an extra parameter controlling the balance between baryons and dark matter in the growth terms of the perturbation equations in the camb Boltzmann solver. This approach captures... https://escholarship.org/uc/item/5m33q3jk Tue, 20 Oct 2026 00:00:00 +0000 Crespi, Andrea Percival, Will J Krolewski, Alex Bonici, Marco Zhang, Hanyu Aguilar, J Ahlen, S Anand, A Bianchi, D Brooks, D Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A de la Macorra, A Doel, P Ferraro, S Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Herrera-Alcantar, HK Huterer, D Ishak, M Joyce, D Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M Le Guillou, L Levi, ME Manera, M Martini, P Meisner, A Miquel, R Nadathur, S Palanque-Delabrouille, N Poppett, C Prada, F Pérez-Ràfols, I Rossi, G Samushia, L Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, JH https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhou, R Zou, H https://escholarship.org/uc/item/28t702fk We present a measurement of baryon acoustic oscillations (BAO) in the cross correlation of triply ionized carbon (C iv) absorption with the positions of quasars (QSO) and emission-line galaxies (ELGs). We use quasars and ELGs from the second data release (DR2) of the Dark Energy Spectroscopic Instrument survey. Our data sample consists of 2.5 million quasars, 3.1 million ELGs, and the C iv absorption is measured along the line of sight of 1.5 million high-redshift quasars with z > 1.3. We measure the isotropic BAO signal at 4.2σ for the C IV×QSO cross correlation. This translates into a 3.0% precision measurement of the ratio of the isotropic distance scale, DV, and the sound horizon at the drag epoch, rd, with DV/rd(zeff = 1.92) = 30.3 ± 0.9. We make the first detection of the BAO feature in the C IV×ELG cross-correlation at a significance of 2.5σ and find DV/rd(zeff = 1.47) = 24.6 ± 1.0. https://escholarship.org/uc/item/28t702fk Tue, 20 Oct 2026 00:00:00 +0000 Bault, Abby Cuceu, Andrei https://orcid.org/0000-0002-2169-0595 Guy, Julien https://orcid.org/0000-0001-9822-6793 Aguilar, J Ahlen, S Bianchi, D Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Canning, R Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 de Belsunce, R de la Macorra, A Dey, Arjun Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gordon, C Green, D Gutierrez, G Hahn, C Herrera-Alcantar, HK Honscheid, K Ishak, M Joyce, R Juneau, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Muñoz-Gutiérrez, A Nadathur, S Palanque-Delabrouille, N Percival, WJ Pieri, Matthew M Poppett, C Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA https://escholarship.org/uc/item/5h47s68n Using the first spectroscopic data release from the Dark Energy Spectroscopic Instrument (DESI DR1), we conduct the largest systematic search for active galactic nuclei (AGN) signatures in ≈1.7 million low-redshift (0.001 ≤ z ≤ 0.45) line-emitting galaxies. Based on the [N ii]/Hα versus [O iii]/Hβ emission-line ratio diagnostic, we identify AGN in 314,245/1,211,573 (25.9%) high-mass ( log(M⋆/M⊙)>9.5 ) and 9648/467,214 (2.1%) dwarf ( log(M⋆/M⊙)≤9.5 ) galaxies. The AGN fraction in line-emitting galaxies increases monotonically with stellar mass, from ∼1.4% at the low-mass end to ∼93.3% at the high-mass end. Among these AGN, 17,949 exhibit broad Hα emission (BL-AGN), which we use to estimate their black hole (BH) masses via single-epoch virial methods. Leveraging this large BL-AGN sample, we extend the MBH − M⋆ scaling relation down to log(M⋆/M⊙)≈7.8 and log(MBH/M⊙)≈4.4 . We find a bimodal distribution of galaxies in this space, characterized by two distinct empirical relations.... https://escholarship.org/uc/item/5h47s68n Mon, 19 Oct 2026 00:00:00 +0000 Pucha, Ragadeepika Juneau, Stéphanie Mezcua, M Dey, Arjun Mao, Y-Y Alexander, DM Circosta, C Fawcett, VA Guo, Wei-Jian Moustakas, J Panda, S Siudek, M Yu, Zhefu Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Dawson, KS de la Macorra, A Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, Satya Gontcho A Gutierrez, G Hahn, C Honscheid, K Joyce, R Kehoe, R Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Meisner, A Miquel, R Nadathur, S Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/2bg7f9dp The published article has been revised. The name of the author Pramod Sharma was previously incorrect and appeared as Pramond Sharma. The original article has been corrected. https://escholarship.org/uc/item/2bg7f9dp Wed, 30 Sep 2026 00:00:00 +0000 Benedikt, M Zimmermann, F Auchmann, B Bartmann, W Burnet, JP Carli, C Chancé, A Craievich, P Giovannozzi, M Grojean, C Gutleber, J Hanke, K Henriques, André Janot, P Lourenço, C Mangano, M Otto, T Poole, J Rajagopalan, S Raubenheimer, T Todesco, E Ulrici, L Watson, T Wilkinson, G Azzi, P Bernardi, G Blondel, A Boscolo, M d’Enterria, D Dam, M de Blas, J Francois, B Freitas, A Ganis, G Keintzel, J Klute, M McCullough, M Monni, PF Palla, F Perez, E Pleier, M-A Riegler, W Sefkow, F Selvaggi, M Abada, A Abbrescia, M Abdolmaleki, H Abidi, SH Abramov, A Adam, C Ady, M Adz̆ić, PR Agapov, I Aguglia, D Ahmed, I Aiba, M Aielli, G Akan, T Akchurin, N Akturk, D Al-Thakeel, M Alberghi, GL Maestre, J Alcaraz Aleksa, M Aleksan, R Alharthi, F Alimena, J Alimenti, A Alioli, S Alix, L Allanach, BC Allwicher, L Altintas, AA Altınlı, M Alviggi, M Ambrosio, G Amhis, Y Amiri, A Ammirabile, G Andeen, T André, KDJ Andrea, J Andreazza, A Andreini, M Andriollo, T Angel, L Angelucci, M Antusch, S Anwar, MN Apolinário, L Apollinari, G Appleby, RB Apresyan, A Apyan, Aram Apyan, Armen Arbey, A Argiento, B Ari, V Arias, S Alonso, B Arias https://escholarship.org/uc/item/9075h84k The Milky Way Backup Program (MWBP), a survey currently underway with the Dark Energy Spectroscopic Instrument (DESI) on the Nicholas U. Mayall 4 m Telescope, works at the margins of the DESI Main surveys to obtain spectra of millions of additional stars from the Gaia catalog. Efficiently utilizing times between ∼12° and 18° twilight and poor weather conditions, the MWBP extends the range of stellar sources studied to both brighter magnitudes and lower Galactic latitude and declination than the stars studied in DESI’s Main Milky Way Survey. While the MWBP prioritizes candidate giant stars selected from the Gaia catalog (using color and parallax criteria), it also includes an unbiased sample of bright stars (i.e., 11.2 ≲ G < 16 mag) as well as fainter sources (to G ≲ 19 mag). As of 2025 March 1, the survey had obtained spectra of ∼7 million stars, approximately 1.2 million of which are included in the DESI Data Release 1. The DESI spectra cover the wavelength range from 3600... https://escholarship.org/uc/item/9075h84k Tue, 29 Sep 2026 00:00:00 +0000 Dey, Arjun Koposov, Sergey E Najita, Joan R Cooper, Andrew P Gänsicke, BT Myers, Adam D Raichoor, A https://orcid.org/0000-0001-5999-7923 Eisenstein, Daniel J Schlafly, EF https://orcid.org/0000-0002-3569-7421 Schlegel, D https://orcid.org/0000-0002-5042-5088 Prieto, C Allende Beraldo e Silva, Leandro Li, Ting S Valluri, M Juneau, Stéphanie Lambert, Mika Li, S Thomas, Guillaume F Wang, Wenting Riley, Alexander H Kizhuprakkat, N Aguilar, J Ahlen, S Bailey, S https://orcid.org/0000-0003-4162-6619 Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Della Costa, J Dey, Biprateep Doel, P Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hahn, C Honscheid, K Ishak, M Jimenez, J Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Nadathur, S Palanque-Delabrouille, N Percival, WJ Pérez-Ràfols, I Prada, F Rossi, G Sanchez, E Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Wechsler, RH Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/867528n7 We implement Crossing Statistics to reconstruct in a model-agnostic manner the expansion history of the universe and properties of dark energy, using DESI Data Release 1 (DR1) BAO data in combination with one of three different supernova compilations (PantheonPlus, Union3, and DES-SN5YR) and Planck CMB observations. Our results hint towards an evolving and emergent dark energy behaviour, with negligible presence of dark energy at z ≳ 1, at varying significance depending on data sets combined. In all these reconstructions, the cosmological constant lies outside the 95% confidence intervals for some redshift ranges. This dark energy behaviour, reconstructed using Crossing Statistics, is in agreement with results from the conventional w 0–w a dark energy equation of state parametrization reported in the DESI Key cosmology paper. Our results add an extensive class of model-agnostic reconstructions with acceptable fits to the data, including models where cosmic acceleration slows down... https://escholarship.org/uc/item/867528n7 Tue, 29 Sep 2026 00:00:00 +0000 Calderon, R Lodha, K Shafieloo, A Linder, E Sohn, W de Mattia, A Cervantes-Cota, JL Crittenden, R Davis, TM Ishak, M Kim, AG https://orcid.org/0000-0001-6315-8743 Matthewson, W Niz, G Park, S Aguilar, J Ahlen, S Allen, S Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Dey, A Dey, B Doel, P Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Honscheid, K Howlett, C Juneau, S Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Miquel, R Moustakas, J Newman, JA Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Rezaie, M Rossi, G Ruhlmann-Kleider, V Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Seo, H Sprayberry, D Tarlé, G Taylor, P Vargas-Magaña, M Weaver, BA Zarrouk, P Zou, H https://escholarship.org/uc/item/78t4810q We present the cosmological analysis of the one-dimensional Lyman-α flux power spectrum from the first data release of the Dark Energy Spectroscopic Instrument (DESI). We capture the dependence of the signal on cosmology and intergalactic medium physics using an emulator trained on a cosmological suite of hydrodynamical simulations, and we correct its predictions for the impact of astrophysical contaminants and systematics, many of these not considered in previous analyses. We employ this framework to constrain the amplitude and logarithmic slope of the linear matter power spectrum at k ★ = 0.009 km-1s and redshift z = 3, obtaining Δ2 ★ = 0.379 ± 0.032 and n ★ = -2.309 ± 0.019 https://github.com/igmhub/cobaya_lya_p1d. The robustness of these constraints is validated through the analysis of mocks and a large number of alternative data analysis variations, with cosmological parameters kept blinded throughout the validation process. We then combine our results with constraints from... https://escholarship.org/uc/item/78t4810q Wed, 16 Sep 2026 00:00:00 +0000 Chaves-Montero, J Font-Ribera, A McDonald, P https://orcid.org/0000-0001-8346-8394 Armengaud, E Chebat, D Garcia-Quintero, C Karaçaylı, NG Ravoux, C Satyavolu, S Schöneberg, N Walther, M Aguilar, J Ahlen, S Bailey, S https://orcid.org/0000-0003-4162-6619 Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gonzalez-Morales, AX Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hahn, C Herrera-Alcantar, HK Honscheid, K Ishak, M Joyce, R Juneau, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Goff, JM Le Guillou, L Leauthaud, A Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Nadathur, S Niz, G Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tan, T Tarlé, G Weaver, BA Yèche, C Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/5wr6j7w1 We present the discovery of SN 2025mkn, a gravitationally lensed Type II supernova. First detected as a blue transient in Zwicky Transient Facility (ZTF), 0 .″ 83 from a z = 0.42 elliptical galaxy, the follow-up SNIFS/UH2.2 m and LRIS/Keck spectra revealed absorption lines at z = 1.371. Later JWST NIRCam imaging shows that the bright transient is a close pair of point sources separated by ∼0.″07 , and a 30 times fainter counterimage opposite the lens, for which NIRSpec reveals strong Hα emission also at z = 1.371. The lightcurves and spectra are consistent with the Type II supernova source being magnified ≳100 times, with ∼250 required to reconcile its luminosity with that of nearby events such as SN 2023ixf. Lens models are consistent with such high magnifications, and always show that the faint image arrived first (undetected in earlier ZTF imaging), consistent with the later spectral phase of this fainter image. A fourth image is also predicted and possibly detected in the... https://escholarship.org/uc/item/5wr6j7w1 Tue, 1 Sep 2026 00:00:00 +0000 Lemon, Cameron Goobar, Ariel Johansson, Joel Mörtsell, Edvard Schulze, Steve Andreoni, Igor Bochenek, Aleksandra Brennan, Seán J Busmann, Malte Coughlin, Michael Das, Kaustav K Dhawan, Suhail Fremling, Christoffer Gangopadhyay, Anjasha Gruen, Daniel Hall, Xander J Ho, Anna YQ Kasliwal, Mansi M Perley, Daniel A Rigault, Mickael Schroeder, Genevieve Smith, Mathew Sollerman, Jesper Somalwar, Jean J Stein, Robert Thorp, Stephen Townsend, Alice Wise, Jacob L Yan, Lin Arendse, Nikki Bellm, Eric C Chen, Tracy X Drake, Andrew Masci, Frank J Purdum, Josiah Smith, Roger Hinkle, Jason T Rivera-Thorsen, T Emil Shappee, Benjamin J Tucker, Michael A Aguilar, Jessica Ahlen, Steven Aldering, Greg BenZvi, Segev Bianchi, Davide Brooks, David Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 de la Macorra, Axel Della Costa, John Dey, Arjun Doel, Peter Flaugher, Brenna Font-Ribera, Andreu Forero-Romero, Jaime E Gaztañaga, Enrique Gontcho, Satya Gontcho A Gutierrez, Gaston Huterer, Dragan Ishak, Mustapha Jimenez, Jorge Joyce, Dick Juneau, Stephanie Kehoe, Robert Kim, Alex G https://orcid.org/0000-0001-6315-8743 Kirkby, David https://orcid.org/0000-0002-8828-5463 Kisner, Theodore Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Lahav, Ofer Landriau, Martin https://orcid.org/0000-0003-1838-8528 Le Guillou, Laurent Levi, Michael E https://orcid.org/0000-0003-1887-1018 Manera, Marc Meisner, Aaron Miquel, Ramon Moustakas, John Nadathur, Seshadri O’Connor, Brendan Palanque-Delabrouille, Nathalie Palmese, Antonella Percival, Will J Pérez-Ràfols, Ignasi Poppett, Claire Prada, Francisco Rossi, Graziano Sanchez, Eusebio Schlegel, David https://orcid.org/0000-0002-5042-5088 Schubnell, Michael Shafieloo, Arman Silber, Joseph https://orcid.org/0000-0002-3461-0320 Sprayberry, David Tarlé, Gregory Weaver, Benjamin A Zou, Hu https://escholarship.org/uc/item/87w3z5gj The cross-correlation of cosmic voids with the lensing convergence ( κ ) map of the Cosmic Microwave Background (CMB) fluctuations provides a powerful tool to refine our understanding of the current cosmological model. However, several studies have reported a moderate tension (up to ∼2 σ ) between the lensing imprint of cosmic voids on the observed CMB and the ΛCDM signal predicted by simulations. To address this “lensing-is-low” tension and to obtain new, precise measurements of the signal, we exploit the large DESI Legacy Survey Luminous Red Galaxy (LRG) data set, covering approximately 19 500 deg 2 of the sky and including about 10 million LRGs at z < 1.05. Our ΛCDM template was created using the Buzzard mocks, which we specifically calibrated to match the clustering properties of the observed galaxy sample by exploiting more than one million DESI spectra. We identified our catalogs of 3D voids in the range 0.35 < z < 0.95 and cross-correlated them through a stacking... https://escholarship.org/uc/item/87w3z5gj Mon, 31 Aug 2026 00:00:00 +0000 Sartori, S Vielzeuf, P Escoffier, S Cousinou, MC Kovács, A DeRose, J Ahlen, S Bianchi, D Brooks, D Burtin, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Forero-Romero, JE Garcia-Bellido, J Gontcho, S Gontcho A Gutierrez, G Honscheid, K Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Landriau, M Levi, ME https://orcid.org/0000-0003-1887-1018 Meisner, A Miquel, R Moustakas, J Newman, JA Palanque-Delabrouille, N Pérez-Ràfols, I Prada, F Rossi, G Sanchez, E Sprayberry, D Tarlé, G Weaver, BA https://escholarship.org/uc/item/47j4k2gt The powerful jets of blazars have been historically considered as likely sites of high-energy cosmic-ray acceleration. However, the particulars of the launched jet and the locations of leptonic and hadronic jet loading remain unclear. In the case when leptonic and hadronic particle injection occur jointly, a temporal correlation between synchrotron radiation and neutrino production is expected. We use a first catalog of millimeter wavelength (95–225 GHz) blazar light curves from the Atacama Cosmology Telescope for a time-dependent correlation with 12 yr of muon neutrino events from the IceCube South Pole Neutrino Observatory. Such millimeter emission traces activity of the bright jet base, which is often self-absorbed at lower frequencies and potentially gamma-ray opaque. We perform an analysis of the population, as well as analyses of individual, selected sources. We do not observe a significant signal from the stacked population. TXS 0506+056 is found as the most significant,... https://escholarship.org/uc/item/47j4k2gt Mon, 31 Aug 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N Finley, C Fischer, L https://escholarship.org/uc/item/2rt857bz Radio pulses generated by cosmic-ray air showers can be used to reconstruct key properties like the energy and depth of the electromagnetic component of cosmic-ray air showers. Radio detection threshold, influenced by natural and anthropogenic radio background, can be reduced through various techniques. In this work, we demonstrate that convolutional neural networks (CNNs) are an effective way to lower the threshold. We developed two CNNs: a classifier to distinguish radio signal waveforms from background noise and a denoiser to clean contaminated radio signals. Following the training and testing phases, we applied the networks to air-shower data triggered by scintillation detectors of the prototype station for the enhancement of IceTop, IceCube’s surface array at the South Pole. Over a four-month period, we identified 554 cosmic-ray events in coincidence with IceTop, approximately five times more compared to a reference method based on a cut on the signal-to-noise ratio. Comparisons... https://escholarship.org/uc/item/2rt857bz Wed, 19 Aug 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/4m432655 Superconducting magnets enable energy-frontier accelerators by generating strong magnetic fields to steer and focus the particles. Although high-temperature superconductors such as (, RE = rare earth) hold a strong potential for generating a higher magnetic field than Nb-Ti and , the associated magnet and conductor technology for accelerator applications is still in its infancy. The U.S. Magnet Development Program is developing magnet technology in collaboration with industry. Here we report an experiment of making a dipole magnet called C3 using commercial high-temperature superconducting wires. The magnet, following a canted design, generated a dipole field of 5.99 T at 4.2 K in its clear aperture of 65 mm at 6.795 kA when a resistive voltage of appeared across one of the coils in the magnet. The stored energy was 53 kJ at the peak field. The magnet showed no degradation in the current-carrying capability at 4.2 K after the thermal cycle. We... https://escholarship.org/uc/item/4m432655 Tue, 18 Aug 2026 00:00:00 +0000 Abraimov, Dmytro Arbelaez, Diego Brouwer, Lucas https://orcid.org/0000-0003-2170-7278 Croteau, Jean-François DiMarco, Joseph Ferracin, Paolo Ghiorso, William B Higley, Hugh C Juchno, Mariusz Lin, Andy Lipton, Thomas Luo, Linqing https://orcid.org/0000-0002-7073-6588 Marchevsky, Maxim https://orcid.org/0000-0001-7283-9305 Mosat, Marek https://orcid.org/0000-0002-0771-3906 Naus, Michael https://orcid.org/0000-0002-4903-4901 Norris, Ryan Pong, Ian https://orcid.org/0000-0002-8996-4249 Prestemon, Soren O https://orcid.org/0000-0002-1937-4040 Radcliff, Kyle Fernández, José Luis Rudeiros Sabbi, GianLuca https://orcid.org/0000-0001-6954-3482 Saravanan, Anjana https://orcid.org/0009-0006-9154-6632 Shen, Tengming Teyber, Reed Turqueti, Marcos https://orcid.org/0000-0002-3892-1353 Vallone, Giorgio https://orcid.org/0000-0003-0716-8116 van der Laan, Danko Villabona, Timothy Wang, Xiaorong https://orcid.org/0000-0001-7065-8615 Weiss, Jeremy D Wu, Yuxin https://orcid.org/0000-0002-6953-0179 Yan, Yufan https://orcid.org/0000-0001-9647-5622 https://escholarship.org/uc/item/9x73w5pk The Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI) is the largest sample to date for small-scale Lyα forest cosmology, accessed through its one-dimensional power spectrum (P 1D). The Lyα forest P 1D is extracted from quasar spectra that are highly inhomogeneous (both in wavelength and between quasars) in noise properties due to intrinsic properties of the quasar, atmospheric and astrophysical contamination, and also sensitive to low-level details of the spectral extraction pipeline. We employ two estimators in DR1 analysis to measure P 1D: the optimal estimator and the fast Fourier transform (FFT) estimator. To ensure robustness of our DR1 measurements, we validate these two power spectrum and covariance matrix estimation methodologies against the challenging aspects of the data. First, using a set of 20 synthetic 1D realizations of DR1, we derive the masking bias corrections needed for the FFT estimator and the continuum fitting bias needed for both estimators.... https://escholarship.org/uc/item/9x73w5pk Tue, 4 Aug 2026 00:00:00 +0000 Karaçaylı, Naim Göksel Ravoux, Corentin Martini, Paul Le Goff, Jean-Marc Armengaud, Eric Abdul-Karim, M Aguilar, J Ahlen, S Anand, A https://orcid.org/0000-0003-2923-1585 BenZvi, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Dey, Biprateep Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Herrera-Alcantar, HK Honscheid, K Ishak, M Jimenez, J Joyce, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Meisner, A Miquel, R Nadathur, S Niz, G Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tan, T Tarlé, G Walther, M Weaver, BA Zou, H https://escholarship.org/uc/item/98p9j514 The effective redshift distribution n(z) of galaxies is a critical component in the study of weak gravitational lensing. Here, we introduce a new method for determining n(z) for weak lensing surveys based on high-quality redshifts and neural-network-based importance weights. Additionally, we present the first unified photometric redshift calibration of the three leading stage-III weak lensing surveys, the Dark Energy Survey (DES), the Hyper Suprime-Cam (HSC) survey, and the Kilo-Degree Survey (KiDS), with state-of-the-art spectroscopic data from the Dark Energy Spectroscopic Instrument (DESI). We verify our method using a new, data-driven approach and obtain n(z) constraints with statistical uncertainties of the order of σz¯∼0.01 and smaller. Our analysis is largely independent of previous photometric redshift calibrations and, thus, provides an important cross-check in light of recent cosmological tensions. Overall, we find excellent agreement with previously published results... https://escholarship.org/uc/item/98p9j514 Tue, 4 Aug 2026 00:00:00 +0000 Lange, JU Blanco, D Leauthaud, A Wright, AH Fisher, A Ratajczak, J Aguilar, J Ahlen, S Bailey, S https://orcid.org/0000-0003-4162-6619 Bianchi, D Blake, C Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 Dawson, KS de la Macorra, A DeRose, J Dey, Arjun Doel, P Emas, N Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Garcia-Quintero, C Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Heydenreich, S Hildebrandt, H Ishak, M Jimenez, J Joudaki, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Medina-Varela, L Meisner, A Miquel, R Moustakas, J Nadathur, S Newman, JA Palanque-Delabrouille, N Porredon, A Prada, F Pérez-Ràfols, I Rossi, G Ruggeri, R Sanchez, E Saulder, C Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Sprayberry, D Sun, Z Tarlé, G Weaver, BA Yuan, S Zarrouk, P Zou, H https://escholarship.org/uc/item/90j6b8rn This paper demonstrates how the Dark Energy Spectroscopic Instrument (DESI) Data Release 1 (DR1) and future baryon acoustic oscillations (BAO) analyses can optimally combine overlapping tracers (galaxies of distinct types) in the same redshift range. We make a unified catalog of Luminous Red Galaxies (LRGs) and Emission Line Galaxies (ELGs) in the redshift range 0.8 < z < 1.1 and investigate the impact on the BAO constraints. DESI DR1 contains ∼ 30% of the final DESI LRG sample and less than 25% of the final ELG sample, and the combination of LRGs and ELGs increases the number density and reduces the shot noise. We developed a pipeline to merge the overlapping tracers using galaxy bias as an approximately optimal weight and tested the pipeline on a suite of Abacus simulations, calibrated on the final version of the DESI Early Data Release. When applying our pipeline to the DESI DR1 catalog, we find an improvement in the BAO constraints of 11% for α iso and ∼ 7.0% for α AP... https://escholarship.org/uc/item/90j6b8rn Tue, 4 Aug 2026 00:00:00 +0000 Valcin, D https://orcid.org/0000-0003-0129-0620 Rashkovetskyi, M Seo, H Beutler, F McDonald, P https://orcid.org/0000-0001-8346-8394 de Mattia, A Rosado-Marín, AJ Ross, AJ Padmanabhan, N Aguilar, J Ahlen, S Andrade, U Bianchi, D Brooks, D Chaussidon, E Chen, S Chen, X Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 Dawson, KS de la Macorra, A Dey, Biprateep Ding, Z Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Hahn, C Honscheid, K Howlett, C Ishak, M Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Mena-Fernández, J Miquel, R Moustakas, J Nadathur, S Paillas, E Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Ruggeri, R Samushia, L Sanchez, E Saulder, C Schlegel, D Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Yu, J Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/90j444fn ABSTRACT We present an efficient estimator for higher order galaxy clustering using small groups of nearby galaxies, or multiplets. Using the Luminous Red Galaxy sample from the Dark Energy Spectroscopic Instrument (DESI) Data Release 2, we identify galaxy multiplets as discrete objects and measure their cross-correlations with the general galaxy field. Our results show that the multiplets exhibit stronger clustering bias as they trace more massive dark matter haloes than individual galaxies. When comparing the observed clustering statistics with the mock catalogues generated from the N-body simulation AbacusSummit, we find that the mocks underpredict multiplet clustering despite reproducing the galaxy two-point autocorrelation reasonably well. This discrepancy indicates that the standard Halo Occupation Distribution (HOD) model is insufficient to describe the properties of galaxy multiplets, revealing the greater constraining power of this higher order statistic on galaxy–halo... https://escholarship.org/uc/item/90j444fn Tue, 4 Aug 2026 00:00:00 +0000 Wang, Hanyue Eisenstein, Daniel J Aguilar, Jessica Nicole Ahlen, Steven Bianchi, Davide Brooks, David Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 de la Macorra, Axel Dey, Arjun Dey, Biprateep Doel, Peter Ferraro, Simone Font-Ribera, Andreu Forero-Romero, Jaime E Gaztañaga, Enrique Gutierrez, Gaston Honscheid, Klaus Ishak, Mustapha Joyce, Richard Juneau, Stephanie Kirkby, David https://orcid.org/0000-0002-8828-5463 Kisner, Theodore Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Lahav, Ofer Lamman, Claire Landriau, Martin Manera, Marc Meisner, Aaron Miquel, Ramon Mueller, Eva-Maria Nadathur, Seshadri Niz, Gustavo Palanque-Delabrouille, Nathalie Percival, Will J Prada, Francisco Pérez-Ràfols, Ignasi Ross, Ashley J Rossi, Graziano Sanchez, Eusebio Schlegel, David Schubnell, Michael Silber, Joseph Harry https://orcid.org/0000-0002-3461-0320 Sprayberry, David Tarlé, Gregory Weaver, Benjamin Alan Zhou, Rongpu https://orcid.org/0000-0001-5381-4372 Zou, Hu https://escholarship.org/uc/item/8xh7h0mm We present 4110 strong gravitational lens candidates, 3887 of which are new discoveries, selected from a sample of 5,837,154 luminous red galaxies (LRGs) observed with the Dark Energy Spectroscopic Instrument (DESI). Candidates are identified via the presence of background ionized oxygen [O ii] nebular emission lines in the foreground LRG spectra, which may originate from the lensing of higher-redshift star-forming galaxies. Using the measured foreground redshift, background redshift, and integrated flux of the background [O ii] doublet, we integrate over impact parameters to compute the probability that each candidate is a lens. We expect 53% of candidates to be true lenses with Einstein radii ranging from 0 .″ 1–4″, which can be confirmed with high-resolution imaging. Confirmed strong lenses from this sample will form a valuable cosmological data set, as strong gravitational lensing is the only method to directly measure dark matter halo substructure at cosmological distances.... https://escholarship.org/uc/item/8xh7h0mm Tue, 4 Aug 2026 00:00:00 +0000 Karp, Juliana SM Schlegel, David J https://orcid.org/0000-0002-5042-5088 Huang, Xiaosheng Padmanabhan, Nikhil Bolton, Adam S Storfer, Christopher J Aguilar, J Ahlen, S Bailey, S https://orcid.org/0000-0003-4162-6619 Bianchi, D Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Della Costa, J Doel, P Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Honscheid, K Ishak, M Jimenez, J Joyce, R Juneau, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Nadathur, S Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schubnell, M Sprayberry, D Tarlé, G Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372 Collaboration, and The DESI https://escholarship.org/uc/item/8c83v3dv Next-generation large-scale structure spectroscopic surveys will probe cosmology at high redshifts (2.3 < z < 3.5), relying on abundant galaxy tracers such as Lyα emitters (LAEs) and Lyman break galaxies (LBGs). Medium-band photometry has emerged as a potential technique for efficiently selecting these high-redshift galaxies. In this work, we present clustering analysis of medium-band selected galaxies at high redshift, utilizing photometric data from the Intermediate Band Imaging Survey (IBIS) and spectroscopic data from the Dark Energy Spectroscopic Instrument (DESI). We interpret the clustering of such samples using both Halo Occupation Distribution (HOD) modeling and a perturbation theory description of large-scale structure. Our modeling indicates that the current target sample is composed from an overlapping mixture of LAEs and LBGs with emission lines. Despite differences in target selection, we find that the clustering properties are consistent with previous studies,... https://escholarship.org/uc/item/8c83v3dv Tue, 4 Aug 2026 00:00:00 +0000 Ebina, H White, M https://orcid.org/0000-0001-9912-5070 Raichoor, A https://orcid.org/0000-0001-5999-7923 Dey, Arjun Schlegel, D Lang, D Luo, Y Aguilar, J Ahlen, S Anand, A https://orcid.org/0000-0003-2923-1585 Bianchi, D Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 Dawson, KS de la Macorra, A Dey, Biprateep Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Herrera-Alcantar, HK Howlett, C Ishak, M Joyce, R Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Magneville, C Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Mueller, E Nadathur, S Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Yèche, C Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/888335bf The aim of this work is to construct mock galaxy catalogues that accurately reproduce the redshift evolution of galaxy number density, clustering statistics, and baryonic properties, such as stellar mass for luminous red galaxies (LRGs) and absolute magnitude in the r-band for the bright galaxy sample (BGS), based on the first three years of observations from the Dark Energy Spectroscopic Instrument (DESI). To achieve this, we applied the subhalo abundance matching (SHAM) technique to the Uchuu N-body simulation, which follows the evolution of 2.1 trillion particles within a volume of 8 h -3 Gpc3, assuming a Planck base-ΛCDM cosmology. Using SHAM, we populated Uchuu subhalos with LRGs and BGS-BRIGHT (r < 19.5) galaxies up to redshift z = 1.1, assigning stellar masses to LRGs and luminosities to BGS galaxies (up to M r ≤ 20). Furthermore, we analyzed the clustering dependence on stellar mass and luminosity for each tracer. Our results show that the Uchuu BGS-BRIGHT and LRG mocks... https://escholarship.org/uc/item/888335bf Tue, 4 Aug 2026 00:00:00 +0000 Fernández-García, E Prada, F Smith, A DeRose, J Ross, AJ Bailey, S https://orcid.org/0000-0003-4162-6619 Wang, MS Ding, Z Guandalin, C Lamman, C Vaisakh, R Kehoe, R Lasker, J Ishiyama, T Moore, SM Cole, S Siudek, M Amalbert, A Salcedo, A Hearin, A Joachimi, B Rocher, A Saito, S Krolewski, A Slepian, Z Li, Q Dawson, KS Jullo, E Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gontcho, S Gontcho A Gutierrez, G Honscheid, K Ishak, M Joyce, R Juneau, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Miquel, R Moustakas, J Nadathur, S Percival, WJ Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 https://escholarship.org/uc/item/8847d0tx The Dark Energy Spectroscopic Instrument (DESI) in its first Data Release (DR1) already provides more than 100,000 galaxies with relative distance measurements. The primary purpose of this paper is to perform the calibration of the zero-point for the DESI Fundamental Plane and Tully–Fisher relations, which allows us to measure the Hubble constant, H0. This sample has a lower statistical uncertainty than any previously used to measure H0, and we investigate the systematic uncertainties in absolute calibration that could limit the accuracy of that measurement. We improve upon the DESI Early Data Release Fundamental Plane H0 measurement by (a) using a group catalog to increase the number of calibrator galaxies and (b) investigating alternative calibrators in the nearby Universe. Our baseline measurement calibrates to the SH0ES/Pantheon+ type Ia supernovae, and finds H0 = 73.7 ± 0.06 (stat.) ± 1.1 (syst.) km s−1 Mpc−1. Calibrating to surface brightness fluctuation distances yields... https://escholarship.org/uc/item/8847d0tx Tue, 4 Aug 2026 00:00:00 +0000 Carr, A Howlett, C Amsellem, AJ Davis, Tamara M Said, K Parkinson, D Palmese, A Aguilar, J Ahlen, S Bautista, J BenZvi, S Bianchi, D Blake, C Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Doel, P Douglass, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Herrera-Alcantar, HK Honscheid, K Huterer, D Ishak, M Joyce, R Kim, AG https://orcid.org/0000-0001-6315-8743 Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Miquel, R Moustakas, J Nadathur, S Percival, WJ Prada, F Pérez-Ràfols, I Qin, F Ross, C Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Seo, H Sprayberry, D Tarlé, G Turner, RJ Weaver, BA Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/7gx3630p The sound horizon scale rs is a key source of information for measurements of H 0 from early-time data, and is therefore a common target of new physics proposed to solve the Hubble tension. We present a sub-2% measurement of the Hubble constant that is independent of this scale, using data from the first data release of the Dark Energy Spectroscopic Instrument (DESI DR1). Building on previous work, we remove dependency on the sound horizon size using a heuristic rescaling procedure at the power spectrum level. A key innovation is the inclusion of uncalibrated (agnostic to rs ) post-reconstruction BAO measurements from DESI DR1, as well as using the CMB acoustic scale θ * as a high-redshift anchor. Uncalibrated type-Ia supernovae are often included as an independent source of Ωm information; here we demonstrate the robustness of our results by additionally considering two supernova-independent alternative datasets. We find somewhat higher values of H 0 relative to our previous... https://escholarship.org/uc/item/7gx3630p Tue, 4 Aug 2026 00:00:00 +0000 Zaborowski, EA Taylor, P Honscheid, K Cuceu, A https://orcid.org/0000-0002-2169-0595 de Mattia, A Krolewski, A Rashkovetskyi, M Ross, AJ To, C Aguilar, J Ahlen, S Anand, A https://orcid.org/0000-0003-2923-1585 BenZvi, S Bianchi, D Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Della Costa, J Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Herrera-Alcantar, HK Howlett, C Huterer, D Ishak, M Joyce, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Nadathur, S Niz, G Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Samushia, L Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/79m6h30j We present spectroscopic data of strong lenses and their source galaxies using the Keck Near-Infrared Echellette Spectrometer (NIRES) and the Dark Energy Spectroscopic Instrument (DESI), providing redshifts necessary for nearly all strong-lensing applications with these systems, especially the extraction of physical parameters from lensing modeling. These strong lenses were found in the DESI Legacy Imaging Surveys using residual neural networks and followed up by our Hubble Space Telescope program, with all systems displaying unambiguous lensed arcs. With NIRES, we target eight lensed sources at redshifts difficult to measure in the optical range and determine the source redshifts for six, between zs = 1.675 and 3.332. DESI observed one of the remaining source redshifts, as well as an additional source redshift within the six systems. The two systems with nondetections by NIRES were observed for a considerably shorter 600 s at high airmass. Combining NIRES infrared spectroscopy... https://escholarship.org/uc/item/79m6h30j Tue, 4 Aug 2026 00:00:00 +0000 Agarwal, Shrihan Huang, Xiaosheng Sheu, W https://orcid.org/0000-0003-1889-0227 Storfer, CJ Tamargo-Arizmendi, M Tabares-Tarquinio, S Schlegel, DJ https://orcid.org/0000-0002-5042-5088 Aldering, G Bolton, A Cikota, A Dey, Arjun Filipp, A Jullo, E Kwon, KJ Perlmutter, S https://orcid.org/0000-0002-4436-4661 Shu, Y Sukay, E Suzuki, N Aguilar, J Ahlen, S BenZvi, S Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Doel, P Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Honscheid, K Ishak, M Juneau, S Kehoe, R Kisner, T Koposov, SE Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L de la Macorra, A Meisner, A Miquel, R Moustakas, J Myers, AD Poppett, C Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schubnell, M Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/76w9q3fx We present the constraint on the growth rate of structure from the combination of DESI DR1 BGS sample, Fundamental Plane, and Tully-Fisher peculiar velocity catalogues using the maximum likelihood fields method. The combined catalogue contains 415,523 galaxy redshifts and 76,616 peculiar velocity measurements. To handle the large amount of data in the DESI DR1 peculiar velocity catalogue, we significantly improve the computational efficiency by rewriting the algorithm with JAX. After removing outliers and Tully-Fisher galaxies that are affected by systematics, we find f σ 8 = 0.483-0.043 +0.080(stat) ± 0.018(sys), consistent within 1σ with the power spectrum and correlation function analysis using the same dataset. Combining all three measurements with appropriate correlations, the consensus measurement is f σ 8 (z eff = 0.07) = 0.450±0.055, consistent with Planck +ΛCDM cosmology (f σ 8 = 0.449 ± 0.008). Combining with the high redshift growth rate of structure measurements from... https://escholarship.org/uc/item/76w9q3fx Tue, 4 Aug 2026 00:00:00 +0000 Lai, Y Howlett, C Aguilar, J Ahlen, S Amsellem, AJ Bautista, J BenZvi, S Bianchi, D Blake, C Brooks, D Carr, A Claybaugh, T https://orcid.org/0000-0002-5024-6987 Davis, TM de la Macorra, A Doel, P Douglass, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Herrera-Alcantar, HK Huterer, D Ishak, M Joyce, R Kim, A https://orcid.org/0000-0001-6315-8743 Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Leauthaud, A Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Muñoz-Gutiérrez, A Nadathur, S Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Qin, F Ross, C Rossi, G Said, K Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Turner, R Weaver, BA Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/67f7s5bk We present the samples of galaxies and quasars used for DESI 2024 cosmological analyses, drawn from the DESI Data Release 1 (DR1). We describe the construction of large-scale structure (LSS) catalogs from these samples, which include matched sets of synthetic reference `randoms' and weights that account for variations in the observed density of the samples due to experimental design and varying instrument performance. We detail how we correct for variations in observational completeness, the input `target' densities due to imaging systematics, and the ability to confidently measure redshifts from DESI spectra. We then summarize how remaining uncertainties in the corrections can be translated to systematic uncertainties for particular analyses. We describe the weights added to maximize the signal-to-noise of DESI DR1 2-point clustering measurements. We detail measurement pipelines applied to the LSS catalogs that obtain 2-point clustering measurements in configuration and Fourier... https://escholarship.org/uc/item/67f7s5bk Tue, 4 Aug 2026 00:00:00 +0000 Adame, AG Aguilar, J Ahlen, S Alam, S Alexander, DM Alvarez, M Alves, O Anand, A https://orcid.org/0000-0003-2923-1585 Andrade, U Armengaud, E Avila, S Aviles, A Awan, H Bailey, S https://orcid.org/0000-0003-4162-6619 Baltay, C Bault, A Behera, J BenZvi, S Beutler, F Bianchi, D Blake, C Blum, R Brieden, S Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Brown, Z Buckley-Geer, E Burtin, E Calderon, R Canning, R Rosell, A Carnero Cereskaite, R Cervantes-Cota, JL Chabanier, S Chaussidon, E Chaves-Montero, J Chen, S Chen, X Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cole, S Cuceu, A https://orcid.org/0000-0002-2169-0595 Davis, TM Dawson, K de la Macorra, A de Mattia, A Deiosso, N Demina, R Dey, A Dey, B Ding, Z Doel, P Edelstein, J Eftekharzadeh, S Eisenstein, DJ Elliott, A Fagrelius, P Fanning, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Ereza, J Findlay, N Flaugher, B Font-Ribera, A Forero-Sánchez, D Forero-Romero, JE Frenk, CS Garcia-Quintero, C Gaztañaga, E Gil-Marín, H Gontcho, S Gontcho A Gonzalez-Morales, AX Gonzalez-Perez, V Gordon, C Green, D Gruen, D Gsponer, R Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hadzhiyska, B Hahn, C Hanif, MMS Herrera-Alcantar, HK Honscheid, K Hou, J Howlett, C Huterer, D Iršič, V Ishak, M Juneau, S Karaçaylı, NG Kehoe, R Kent, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kitaura, F-S Kong, H Kremin, A https://orcid.org/0000-0001-6356-7424 Krolewski, A Lai, Y Lan, T-W Landriau, M https://orcid.org/0000-0003-1838-8528 Lang, D https://escholarship.org/uc/item/6501b837 We present the Dark Energy Spectroscopic Instrument (DESI) Strong Lens Foundry. We discovered ∼3500 new strong gravitational lens candidates in the DESI Legacy Imaging Surveys using residual neural networks (ResNet). We observed a subset (51) of our candidates using the Hubble Space Telescope (HST). Except for one ambiguous case, we have confirmed 50 of the 51 candidates to be strong lenses. We also briefly describe spectroscopic follow-up observations by DESI and Keck NIRES programs. From this very rich data set, a number of studies will be carried out, including evaluating the quality of the ResNet search candidates and lens modeling. In this paper, we present our initial effort in these directions. In particular, as a demonstration, we present the lens model for DESI-165.4754−06.0423, with imaging data from HST, and lens and source redshifts from DESI and Keck NIRES, respectively. In this effort, we have applied a fully forward-modeling Bayesian approach (GIGA-Lens), using... https://escholarship.org/uc/item/6501b837 Tue, 4 Aug 2026 00:00:00 +0000 Huang, Xiaosheng Baltasar, Saul Ratier-Werbin, N Storfer, C Sheu, W https://orcid.org/0000-0003-1889-0227 Agarwal, S Tamargo-Arizmendi, M Schlegel, DJ https://orcid.org/0000-0002-5042-5088 Aguilar, J Ahlen, S Aldering, G Banka, S BenZvi, S Bianchi, D Bolton, A Brooks, D Cikota, A Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Dey, A Doel, P Edelstein, J Filipp, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gu, A Gutierrez, G Honscheid, K Jullo, E Juneau, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Kwon, KJ Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Lang, D Le Guillou, L Liu, J Meisner, A Miquel, R Moustakas, J Myers, AD Perlmutter, S https://orcid.org/0000-0002-4436-4661 Pérez-Ràfols, I Prada, F Rossi, G Rubin, D https://orcid.org/0000-0001-5402-4647 Sanchez, E Schubnell, M Shu, Y Silver, E Sprayberry, D Suzuki, N Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/5tp9s0q5 The standard cosmological analysis with the Lyα forest relies on a continuum fitting procedure that suppresses information on large scales and distorts the three-dimensional correlation function on all scales. In this work, we present the first cosmological forecasts without continuum fitting distortion in the Lyα forest, focusing on the recovery of large-scale information. Using idealized synthetic data, we compare the constraining power of the full shape of the Lyα forest auto-correlation and its cross-correlation with quasars using the baseline continuum fitting analysis versus the true continuum. We find that knowledge of the true continuum enables a ∼ 10% reduction in uncertainties on the Alcock-Paczyński (AP) parameter and the matter density, Ωm. We also explore the impact of large-scale information by extending the analysis up to separations of 240 h -1Mpc along and across the line of sight. The combination of these analysis choices can recover significant large-scale information,... https://escholarship.org/uc/item/5tp9s0q5 Tue, 4 Aug 2026 00:00:00 +0000 Turner, Wynne Cuceu, Andrei https://orcid.org/0000-0002-2169-0595 Martini, Paul Aguilar, J Ahlen, S Anand, A https://orcid.org/0000-0003-2923-1585 Bianchi, D Brooks, D Casas, L Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Dey, B Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Herrera-Alcantar, HK Honscheid, K Ishak, M Joyce, R Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Miquel, R Muñoz-Gutiérrez, A Nadathur, S Niz, G Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Ross, AJ Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Walther, M Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/4x2923j4 Measurements of galaxy distributions at large cosmic distances capture clustering from the past. In this study, we use a cosmological model to translate these observations into the present-day galaxy distribution. Specifically, we reconstruct the 3D linear matter power spectrum at redshift z = 0 using Dark Energy Spectroscopic Instrument (DESI) Year 1 (DR1) galaxy clustering data and Cosmic Microwave Background (CMB) observations, assuming the ΛCDM model, and compare it to the result assuming the w 0 wa CDM model. Building on previous state-of-the-art methods, we apply Effective Field Theory (EFT) modelling of the galaxy power spectrum to account for small-scale effects in the 2-point statistics of galaxy data. Implementation of the EFT approach improves the modelling of the galaxy power spectrum, providing a more robust consistency test of the assumed cosmological model. By casting both CMB and galaxy clustering observations, spanning distinct redshift regimes, into k-space,... https://escholarship.org/uc/item/4x2923j4 Tue, 4 Aug 2026 00:00:00 +0000 Cereskaite, R Mueller, E Howlett, C Davis, Tamara M Aguilar, J Ahlen, S Bianchi, D Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Hahn, C Honscheid, K Huterer, D Ishak, M Joyce, R Juneau, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A https://orcid.org/0009-0003-5658-2601 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Meisner, A Miquel, R Moustakas, J Nadathur, S Newman, JA Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H collaboration, The DESI https://escholarship.org/uc/item/4qd5v5q6 ABSTRACT We present galaxy luminosity functions (LFs) for the Dark Energy Spectroscopic Instrument (DESI) DR2 Bright Galaxy Survey (BGS) in the g, r, z, and $w1$ bands over $0.002\lt z\lt 0.6$. Our analysis uses updated k-corrections and evolutionary corrections, including new polynomial kcorrection fits derived from BGS Year 1 data that supersede earlier GAMA-based prescriptions. Exploiting the statistical power of DESI, we measure LFs to very faint magnitudes, reaching $^{0.1}M_r-5\log h\sim -10$. Independent measurements from the North and South survey regions show excellent agreement around the LF knee, but the very small statistical uncertainties reveal that simple analytic forms fail to capture the full LF shape. The bright end departs from a pure exponential decline, while the faint end exhibits complex, non-powerlaw behaviour, including a pronounced upturn at $^{0.1}M_r-5\log h\gtrsim -15$, which is stronger for red galaxies than for blue. We show that our LFs are largely... https://escholarship.org/uc/item/4qd5v5q6 Tue, 4 Aug 2026 00:00:00 +0000 Moore, Samuel G Cole, Shaun Wilson, Michael Norberg, Peder Moustakas, John Aguilar, J Ahlen, S Anand, A Bianchi, D Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A de la Macorra, A Dey, Arjun Dey, Biprateep Ferraro, S Font-Ribera, A Forero-Romero, JE Gaztanaga, E Gontcho, S Gontcho A Gutierrez, G Herrera-Alcantar, HK Honscheid, K Ishak, M Joyce, R Juneau, S Kehoe, R Kisner, T Koposov, SE Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M Le Guillou, L Levi, ME Lucey, JR Manera, M Meisner, A Miquel, R Nadathur, S Percival, WJ Poppett, C Prada, F Ross, AJ Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Wechsler, RH Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/4js3503r On 2025 August 18, the LIGO–Virgo–KAGRA collaboration reported a subthreshold gravitational-wave candidate detection consistent with a subsolar-mass neutron star merger, denoted S250818k. An optical transient, AT2025ulz, was discovered within the localization region. AT2025ulz initially appeared to meet the expected behavior of kilonova emission, the telltale signature of a binary neutron star merger. The transient subsequently rebrightened after ∼5 days and was classified as a Type IIb supernova. In this work, we analyze the observations of its host galaxy obtained by the Dark Energy Spectroscopic Instrument (DESI). From the DESI spectrum, we obtain a secure redshift of z = 0.084840 ± 0.000006. If S250818k has an astrophysical origin, this places the transient within 2σ of the gravitational-wave distance and results in an integral overlap between the gravitational-wave alert and the transient location of log10I≈3.9−4.2 . Our analysis of the host galaxy’s spectral energy distribution... https://escholarship.org/uc/item/4js3503r Tue, 4 Aug 2026 00:00:00 +0000 Hall, Xander J Palmese, Antonella O’Connor, Brendan Gruen, Daniel Busmann, Malte Gassert, Julius Hu, Lei Hernandez, Ignacio Magaña Aguilar, Jessica Nicole Amsellem, Ariel Ahlen, Steven Banovetz, John BenZvi, Segev Bianchi, Davide Brooks, David Castander, Francisco Javier Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 Cuceu, Andrei https://orcid.org/0000-0002-2169-0595 Dey, Arjun Doel, Peter Fabà-Moreno, Jennifer Ferraro, Simone https://orcid.org/0000-0003-4992-7854 Font-Ribera, Andreu Forero-Romero, Jaime E Gutierrez, Gaston Le Guillou, Laurent Joyce, Dick Kisner, Theodore Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Lahav, Ofer Lamman, Claire Landriau, Martin https://orcid.org/0000-0003-1838-8528 Levi, Michael https://orcid.org/0000-0003-1887-1018 de la Macorra, Axel Manera, Marc Meisner, Aaron Miquel, Ramon Moustakas, John Nadathur, Seshadri Prada, Francisco Pérez-Ràfols, Ignasi Rossi, Graziano Sanchez, Eusebio Schlegel, David https://orcid.org/0000-0002-5042-5088 Schubnell, Michael Sprayberry, David Tarlé, Gregory Weaver, Benjamin Alan Zhou, Rongpu https://orcid.org/0000-0001-5381-4372 Zou, Hu Collaboration, The Dark Energy Spectroscopic Instrument https://escholarship.org/uc/item/32p4s5xx The intergalactic medium (IGM) around a quasar is shaped by its dense environment and by its excess ionizing radiation, which form a “quasar proximity zone” whose size and anisotropy depend on the quasar’s halo mass, luminosity, age, and radiation geometry. Using over 10,000 quasar pairs from the Dark Energy Spectroscopic Instrument (DESI) Year 1 data, with projected comoving separations r⊥ < 2h−1 Mpc, we investigate how the proximity zone of foreground quasars at z ∼ 2–3.5 affects Lyα absorption in their background quasars. The large DESI sample enables unprecedented precision in measuring this “transverse proximity” effect, allowing a detailed investigation of the signal’s dependence on the projected separation of quasar pairs and the luminosity of the foreground quasar. We find that enhanced gas clustering near quasars dominates over their ionizing effect, leading to stronger absorption on neighboring sightlines. Under the assumption that quasar ionizing luminosity is isotropic... https://escholarship.org/uc/item/32p4s5xx Tue, 4 Aug 2026 00:00:00 +0000 Hada, Ryuichiro Martini, Paul Weinberg, David H Zheng, Zheng Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Herrera-Alcantar, HK Honscheid, K Ishak, M Joyce, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Meisner, A Miquel, R Muñoz-Gutiérrez, A Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/2x236352 The Lyman-α (Lyα) forest is a key tracer of large-scale structure at redshifts z > 2, traditionally studied using the spectra of luminous but relatively rare quasars. In this work, we explore the viability of using the fainter yet significantly more abundant Lyman Break Galaxies (LBGs) as alternative background sources for Lyα forest studies. We analyze 4,151 Lyα forest skewers extracted from LBG spectra obtained in the DESI pilot surveys conducted in the COSMOS and XMM-LSS fields. From this dataset, we present the first measurement of the Lyα forest auto-correlation function derived exclusively from LBG spectra, probing comoving separations up to 48 h -1 Mpc at an effective redshift of z eff = 2.70. The measured LBG Lyα forest auto-correlation is consistent with that derived from DESI DR2 quasar Lyα forest spectra at a comparable redshift, validating the use of LBGs as reliable background sources for Lyα forest analyses. In addition, we measure the cross-correlation between... https://escholarship.org/uc/item/2x236352 Tue, 4 Aug 2026 00:00:00 +0000 Herrera-Alcantar, Hiram K Armengaud, Eric Yèche, Christophe Gordon, Calum Casas, Laura Font-Ribera, Andreu Magneville, Christophe Ravoux, Corentin Aguilar, J Ahlen, S Anand, A https://orcid.org/0000-0003-2923-1585 Brooks, D Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 Dawson, KS de la Macorra, A Dey, Arjun Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gonzalez-Morales, AX Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hahn, C Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Martini, P Meisner, A Miquel, R Muñoz-Gutiérrez, A Nadathur, S Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/2rd9f0bn Reconstruction of the baryon acoustic oscillation (BAO) signal has been a standard procedure in BAO analyses over the past decade and has helped to improve the BAO parameter precision by a factor of ∼2 on average. The Dark Energy Spectroscopic Instrument (DESI) BAO analysis for the first year (DR1) data uses the “standard” reconstruction framework, in which the displacement field is estimated from the observed density field by solving the linearized continuity equation in redshift space, and galaxy and random positions are shifted in order to partially remove non-linearities. There are several approaches to solving for the displacement field in real survey data, including the multigrid (MG), iterative Fast Fourier Transform (iFFT), and iterative Fast Fourier Transform particle (iFFTP) algorithms. In this work, we analyze these algorithms and compare them with various metrics including two-point statistics and the displacement itself using realistic DESI mocks. We focus on three... https://escholarship.org/uc/item/2rd9f0bn Tue, 4 Aug 2026 00:00:00 +0000 Chen, X Ding, Z Paillas, E Nadathur, S Seo, H Chen, S Padmanabhan, N White, M https://orcid.org/0000-0001-9912-5070 de Mattia, A McDonald, P https://orcid.org/0000-0001-8346-8394 Ross, AJ Variu, A Rosell, A Carnero Hadzhiyska, B Hanif, MMS Forero-Sánchez, D Ahlen, S Alves, O Andrade, U BenZvi, S Bianchi, D Brooks, D Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Dey, Biprateep Fanning, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Garcia-Quintero, C Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Hahn, C Honscheid, K Juneau, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Levi, ME https://orcid.org/0000-0003-1887-1018 Meisner, A Mena-Fernández, J Miquel, R Moustakas, J Muñoz-Gutiérrez, A Nikakhtar, F Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rashkovetskyi, M Rossi, G Ruggeri, R Sanchez, E Saulder, C Schlegel, D Schubnell, M Smith, A Sprayberry, D Tarlé, G Valcin, D https://orcid.org/0000-0003-0129-0620 Vargas-Magaña, M Weaver, BA Yuan, S Zhou, R https://orcid.org/0000-0001-5381-4372 https://escholarship.org/uc/item/1wg83331 We present a measurement of the non-Gaussian four-point correlation function (4PCF) from the DESI DR1 luminous red galaxy (LRG) sample. For the gravitationally induced parity-even 4PCF, we detect a signal with a significance of using our fiducial setup. We assess the robustness of this detection through a series of validation tests, including auto and cross-correlation analyses, sky partitioning across multiple patch combinations, and variations in radial scale cuts. Due to the low completeness of the sample, we find that differences in fiber assignment implementation schemes can significantly impact estimation of the covariance and introduce biases in the data vector. After correcting for these effects, all tests yield consistent results. This is one of the first measurements of the connected 4PCF on the DESI LRG sample; the good agreement between the simulation and the data implies that the amplitude of the density fluctuation inferred from the connected 4PCF is consistent... https://escholarship.org/uc/item/1wg83331 Tue, 4 Aug 2026 00:00:00 +0000 Hou, J Cahn, RN Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Doel, P Ferraro, S Forero-Romero, JE Gaztañaga, E Le Guillou, L Gutierrez, G Honscheid, K Huterer, D Ishak, M Joyce, R Juneau, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lamman, C Landriau, M de la Macorra, A Manera, M de Mattia, A Miquel, R Mueller, E Nadathur, S Niz, G Percival, WJ Prada, F Pérez-Ràfols, I Ross, AJ Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Slepian, Z Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/1k88d64c We derive constraints on the neutrino mass using a variety of recent cosmological datasets, including DESI BAO, the full-shape analysis of the DESI matter power spectrum and the one-dimensional power spectrum of the Lyman-α forest (P1D) from eBOSS quasars as well as the cosmic microwave background (CMB). The constraints are obtained in the frequentist formalism by constructing profile likelihoods and applying the Feldman-Cousins prescription to compute confidence intervals. This method avoids potential prior and volume effects that may arise in a comparable Bayesian analysis. Parabolic fits to the profiles allow one to distinguish changes in the upper limits from variations in the constraining power σ of the different data combinations. We find that all profiles in the ΛCDM model are cut off by the ∑mν ≥ 0 bound, meaning that the corresponding parabolas reach their minimum in the unphysical sector. The most stringent 95% C.L. upper limit is obtained by the combination of DESI... https://escholarship.org/uc/item/1k88d64c Tue, 4 Aug 2026 00:00:00 +0000 Chebat, D Yèche, C Armengaud, E Schöneberg, N Walther, M de Mattia, A Rohlf, J Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Hahn, C Herrera-Alcantar, HK Howlett, C Huterer, D Ishak, M Jimenez, J Joyce, R Juneau, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Magneville, C Manera, M Miquel, R Moustakas, J Niz, G Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/1524x8cw Using the Dark Energy Spectroscopic Instrument (DESI) Milky Way Survey, we examine the six-dimensional space of the anticenter region of the Milky Way stellar disk (150° < Galactic longitude < 220°) using 61,883 main-sequence turnoff stars. We focus on two well-known stellar overdensities in the anticenter: the Monoceros Ring (MRi) and Anticenter Stream (ACS). We find that the MRi overdensity has kinematic signatures consistent with a tidally induced spiral arm, a type of dynamic spiral arm created by an interaction with a satellite galaxy, most likely the Sagittarius dwarf spheroidal galaxy (Sgr). We use the kinematics of the MRi to calculate the two most recent passage times of Sgr, finding 0.25 ± 0.09 Gyr and 1.10 ± 0.23 Gyr from the present day. We validate that the ACS is kinematically decoupled from the MRi because they are moving in opposite radial and vertical directions. We find that the kinematics associated with the ACS extends beyond our defined overdensity.... https://escholarship.org/uc/item/1524x8cw Tue, 4 Aug 2026 00:00:00 +0000 Lambert, Mika https://orcid.org/0000-0002-2527-8899 Rockosi, Constance M Koposov, Sergey E Li, Ting S Valluri, Monica Beraldo e Silva, Leandro Li, Songting Amarante, João AS Byström, Amanda Medina, Gustavo E Sandford, Nathan R Najita, Joan Kizhuprakkat, Namitha Aguilar, Jessica N Ahlen, Steven Bianchi, Davide Brooks, David Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 Dawson, Kyle de la Macorra, Axel Doel, Peter Forero-Romero, Jaime E Gaztañaga, Enrique Gontcho, Satya Gontcho A Gutierrez, Gaston Joyce, Richard Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Lamman, Claire Landriau, Martin https://orcid.org/0000-0003-1838-8528 Le Guillou, Laurent Manera, Marc Meisner, Aaron Miquel, Ramon Moustakas, John Myers, Adam Nadathur, Seshadri Percival, Will Prada, Francisco Pérez-Ràfols, Ignasi Rossi, Graziano Sanchez, Eusebio Schlegel, David https://orcid.org/0000-0002-5042-5088 Schubnell, Michael Silber, Joseph H https://orcid.org/0000-0002-3461-0320 Sprayberry, David Tarlé, Gregory Weaver, Benjamin A Zhou, Rongpu https://orcid.org/0000-0001-5381-4372 Zou, Hu https://escholarship.org/uc/item/13n1x48m We calibrate the Tully–Fisher relation (TFR) with data from the DESI Peculiar Velocity (PV) Survey taken during the Survey Validation (SV) period of the DESI galaxy redshift survey. Placing spectroscopic fibers on the centers and major axes of spatially extended spiral galaxies identified in the 2020 Siena Galaxy Atlas using the DESI Legacy Surveys, we measure the rotational velocities at 0.33R26 for 1155 (1128 + 27 dwarf) spiral galaxies observed during SV. Using 39 spiral galaxies observed in the Coma cluster, we find a slope for the TFR of −8.32 ± 0.15 AB mag in the r band, with a scatter about the TFR of 1.12 ± 0.03 AB mag. We calibrate the zero-point of the TFR using galaxies with independent distances measured using type Ia supernovae (SNe Ia) via the cosmological distance ladder. From the SN Ia distances, we measure a zero-point of −19.21−0.31+0.30 AB mag in the r band. We produce a public catalog of the distances to these 1128 spiral galaxies observed during DESI SV as... https://escholarship.org/uc/item/13n1x48m Tue, 4 Aug 2026 00:00:00 +0000 Douglass, K BenZvi, S Uberoi, N Howlett, C Saulder, C Said, K Demina, R Aguilar, J Ahlen, S Aldering, G Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 Davis, TM Dawson, KS de la Macorra, A Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Hahn, C Honscheid, K Ishak, M Joyce, R Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M https://orcid.org/0000-0003-1838-8528 Levi, ME https://orcid.org/0000-0003-1887-1018 Lucey, J Martini, P Meisner, A Miquel, R Moustakas, J Palanque-Delabrouille, N Percival, WJ Prada, F Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/0zs4h0qz We present a new measurement of the Hubble constant, H0, following the gravitational-wave event GW170817 and Dark Energy Spectroscopic Instrument (DESI) observations. A standard siren measurement with a nearby (luminosity distance ∼40 Mpc) event such as GW170817 is typically sensitive to the peculiar motion of the host galaxy owing to local dynamics. Previous measurements from this event have taken advantage of peculiar velocity measurements of nearby galaxies, including a handful of objects in the galaxy group that the host of the event, NGC 4993, has been associated with. Still, the group’s properties and NGC 4993’s membership were debated. We present DESI observations of thousands of galaxies in the vicinity of NGC 4993, resulting in 39 group galaxies and a fivefold increase in galaxies compared to previous observations, with many contributing to a peculiar velocity measurement. Examining the local dynamics, our observations support the presence of a galaxy group of which NGC... https://escholarship.org/uc/item/0zs4h0qz Tue, 4 Aug 2026 00:00:00 +0000 Amsellem, AJ Palmese, A Douglass, K Howlett, C Karp, JSM Hernandez, I Magaña Moustakas, J Wechsler, RH Aguilar, J Ahlen, S BenZvi, S Bianchi, D Brooks, D Carr, A Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 Davis, TM de la Macorra, A Dey, A Dey, B Doel, P Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Honscheid, K Ishak, M Joyce, R Kehoe, R Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A https://orcid.org/0009-0003-5658-2601 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Manwadkar, V Meisner, A Miquel, R Myers, AD Nadathur, S Niz, G Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Raichoor, A https://orcid.org/0000-0001-5999-7923 Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Zhou, R https://orcid.org/0000-0001-5381-4372 COLLABORATION, THE DESI https://escholarship.org/uc/item/5x86k8x4 We present a cosmological analysis combining full-shape (FS) clustering measurements from the Dark Energy Spectroscopic Instrument (DESI) DR1 with baryon acoustic oscillation (BAO) measurements from DESI DR2. To achieve a robust combination that accounts for the correlation between the two data releases, we employ the ShapeFit compression method and estimate the joint covariance using EZmocks. This compressed approach inherently mitigates the prior volume effects that have previously dominated Bayesian constraints from DESI data with minimal external priors. Consequently, we obtain — for the first time within a Bayesian framework — reliable DESI-only constraints on extensions to ΛCDM using only a Big Bang Nucleosynthesis prior on the baryon density and a wide prior on the spectral index. In flat ΛCDM, we find Ω m = 0.3035 ± 0.0085, h = 0.6876 ± 0.0059, and σ 8 = 0.822 ± 0.034. For the w 0 wa CDM dynamical dark energy model, we measure w 0 = -0.49 ± 0.25 and wa = -1.52 ± 0.77,... https://escholarship.org/uc/item/5x86k8x4 Tue, 28 Jul 2026 00:00:00 +0000 Forero-Sánchez, D Gil-Marín, H Verde, L Ding, Z Ross, AJ Rosell, A Carnero Aguilar, J Ahlen, S Bailey, S https://orcid.org/0000-0003-4162-6619 Bianchi, D Blake, C Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Canning, R Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cole, S Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Dey, Arjun Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hahn, C Herrera-Alcantar, HK Honscheid, K Huterer, D Ishak, M Joyce, R Juneau, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kneib, J Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Meisner, A Miquel, R Moustakas, J Niz, G Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlafly, EF https://orcid.org/0000-0002-3569-7421 Schlegel, D Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhao, C Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/5zn0x153 We explore the potential of cross-correlating galaxies and peculiar velocities on non-linear scales to enhance cosmological constraints. Leveraging the A BACUS S UMMIT simulation suite and the halo occupation distribution (HOD) formalism, we trained emulator models to describe the non-linear clustering of galaxies and velocities in redshift space. Our analysis demonstrates that combining galaxy and peculiar velocity clustering provides tighter constraints on both HOD and cosmological parameters, particularly on σ 8 and w 0 . We further applied our models to realistic mock catalogues, reproducing the expected density and peculiar velocity errors of type-Ia supernovae, Tully-Fisher and fundamental plane measurements for the combined ZTF and DESI measurements. While systematic biases arise in the HOD parameters, the cosmological constraints remain unbiased, yielding a 3.8% precision measurement on fσ 8 compared to 4.7% when using galaxy clustering alone. We demonstrate that while... https://escholarship.org/uc/item/5zn0x153 Wed, 22 Jul 2026 00:00:00 +0000 Dumerchat, T Bautista, J Ravoux, C Aguilar, J Ahlen, S BenZvi, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Hahn, C Howlett, C Ishak, M Joyce, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lamman, C Landriau, M Le Guillou, L Manera, M Miquel, R Nadathur, S Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/1kh2n1k6 Recent advances in deformable mirrors based on monolithic piezoelectric substrates, such as lithium niobate, have the potential to improve the image quality of X-ray optical systems on synchrotron and free-electron laser beamlines and microscopes. However, the quantitative relationship between design parameters and the deformed shape has not been readily available in the literature. We present an analytical model, validated through finite element analysis, enabling calculation of tangential and sagittal curvatures based on mirror dimensions, crystallographic orientation, and applied voltage. We demonstrate that through the selection of material orientation, it is possible to achieve different deformed shapes (sphere, cylinder, or hyperbolic paraboloid). This methodology can be generalized to other piezoelectric materials and substrate-integrated actuator systems. https://escholarship.org/uc/item/1kh2n1k6 Wed, 22 Jul 2026 00:00:00 +0000 Marzari, Francesco Cutler, Grant https://orcid.org/0000-0003-2570-3952 Goldberg, Kenneth A https://orcid.org/0000-0001-9984-5780 https://escholarship.org/uc/item/1jk5j89r An integrated detection system, consists of a thin diamond sensor incorporated into a compact signal loop, coupled in turn to an application-specific integrated circuit readout chip, has been tested for the first time, using ps-duration electron pulses from the Next Linear Collider Test Accelerator at the SLAC National Accelerator Laboratory. For readout frame rates as high as 120 kHz, the detection system is shown to achieve a linear dynamic range of and a bandwidth of 4–5 GHz, with no ringing seen on the tail of the output pulse. These results represent the best-performing multi-GHz ionizing particle detection system achieved to date. https://escholarship.org/uc/item/1jk5j89r Wed, 22 Jul 2026 00:00:00 +0000 Ferezghi, Mohammadreza Mohseni Grace, Carl Gulley, Mark Jacobson, Bryce Kim, Dongsung Martinez-McKinney, Forest McDaniel, James McHale, Sean Morris, Tyler Mudford, Samuel Padilla, Rene Prakash, Tarun Prebys, Eric Schumm, Bruce A Shin, Kyung-Wook Smedley, John Tiernan, Aidan Wilder, Max https://escholarship.org/uc/item/77w3p3jg The discovery of joint sources of high-energy neutrinos and gravitational waves has been a primary target for the LIGO, Virgo, KAGRA, and IceCube observatories. The joint detection of high-energy neutrinos and gravitational waves would provide insight into cosmic processes, from the dynamics of compact object mergers and stellar collapses to the mechanisms driving relativistic outflows. The joint detection of multiple cosmic messengers can also elevate the significance of the common observation even when some or all of the constituent messengers are subthreshold, i.e., not significant enough to declare their detection individually. Using data from the LIGO, Virgo, and IceCube observatories, including subthreshold events, we searched for common sources of gravitational waves and high-energy neutrinos during the third observing run of the Advanced LIGO and Advanced Virgo detectors. Our search did not identify significant joint sources. We derive constraints on the rate densities... https://escholarship.org/uc/item/77w3p3jg Thu, 16 Jul 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, S BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Countryman, ST Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Ding, T Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eldridge, C Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR https://escholarship.org/uc/item/3jw844j1 Electron Cyclotron Resonance Ion Sources (ECRISs) that utilize Nb-Ti superconducting coils for 28 GHz frequencies have been operating effectively for over twenty years. However, transitioning to higher frequencies demands stronger magnetic fields, and the conventional racetrack-and-solenoid ECRIS structures have reached their maximum capability with Nb-Ti. To address this, a Mixed Axial and Radial field System Demonstrator (MARS-D) is being developed at Lawrence Berkeley National Laboratory (LBNL). This system features an innovative Closed-Loop Coil (CLC) design that optimizes the use of the conductor fields, enabling the application of Nb-Ti in the next-generation 45 GHz ECRISs. The fabrication of the hexagonal CLC is particularly challenging due to its complex winding path and shape, the stiffness of the Nb-Ti superconducting wire, and the small bending radius. To address these challenges, a series of unique fixtures and tools, as well as a pre-over-bending method, were developed... https://escholarship.org/uc/item/3jw844j1 Wed, 1 Jul 2026 00:00:00 +0000 Xu, Lianrong Benitez, Janilee https://orcid.org/0000-0002-4596-1484 Duran, Jaime Cruz Ferracin, Paolo Juchno, Mariusz Phair, Larry https://orcid.org/0000-0003-0706-5512 Todd, Damon https://orcid.org/0009-0000-6684-8141 Wang, Li Xie, Daniel Yang, Ye https://orcid.org/0000-0001-6845-9297 https://escholarship.org/uc/item/0rz293xt We report improved measurements of the all flavor astrophysical neutrino spectrum with IceCube by combining complementary neutrino samples in two independent analyses. Both analyses show evidence of a harder spectrum at energies below ∼30  TeV compared to higher energies where the spectrum is well characterized by a power law. The spectrum is better described by a log parabola or a broken power law, the latter being the preferred model. Both, however, reject a single power law over an energy range 5 TeV-10 PeV with a significance >4σ, providing new constraints on properties of cosmic neutrino sources. https://escholarship.org/uc/item/0rz293xt Thu, 25 Jun 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Arguelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Boser, S Botner, O Bottcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Diaz-Velez, JC DiKerby, S Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsasser, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/7gh6f6vg The IceCube Upgrade is an extension of the existing IceCube Neutrino Observatory and will be deployed in the 2025–2026 austral summer. It will significantly improve the sensitivity of the detector to atmospheric neutrino oscillations. The existing 86-string IceCube array contains a dense in-fill known as DeepCore which is optimized to measure neutrinos with energies down to a few GeV. The IceCube Upgrade will consist of seven new densely instrumented strings placed within the DeepCore volume to further enhance the performance in the GeV energy range. The additional strings will feature new optical modules, each containing multiple photomultiplier tubes (PMTs), in contrast to the existing modules that each contain a single PMT. This will more than triple the number of PMT channels with respect to the current IceCube configuration, allowing for improved detection efficiency and reconstruction performance at GeV energies. We describe necessary updates to simulation, event selection,... https://escholarship.org/uc/item/7gh6f6vg Wed, 24 Jun 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/36h516fc The IceCube South Pole Neutrino Observatory has discovered the presence of a diffuse astrophysical neutrino flux at energies of TeV and beyond using neutrino induced muon tracks and cascade events from neutrino interactions. We present two analyses sensitive to neutrino events in the energy range 1 TeV to 10 PeV, using more than 10 years of IceCube data. Both analyses consistently reject a neutrino spectrum following a single power-law with a significance of >4σ in favor of a broken power law. We describe the methods implemented in the two analyses, the spectral constraints obtained, and the validation of the robustness of the results. Additionally, we report the detection of a muon neutrino in the medium energy starting events sample, or MESE, with an energy of 11.4-2.53+2.46 PeV, the highest energy neutrino observed by IceCube to date. The results presented here show insights into the spectral shape of astrophysical neutrinos, which has important implications for inferring... https://escholarship.org/uc/item/36h516fc Wed, 24 Jun 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Arguelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Boser, S Botner, O Bottcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Diaz-Velez, JC DiKerby, S Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsasser, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/58z6z10q Next-generation neutrinoless double-beta ( $\mathbf {0}\boldsymbol { u }\boldsymbol {\beta }\boldsymbol {\beta }$ ) decay searches require a large detector/isotope mass and very low radioactive backgrounds. The upcoming LEGEND-1000 experiment (Large Enriched Germanium Experiment for Neutrinoless double-beta Decay) constitute a ton-scale array of several hundred high-purity germanium (HPGe) detectors enriched in 76Ge, the isotope of interest. It aims to reach a sensitivity beyond $10\mathbf {^{28}}$ years on the $\mathbf {0}\boldsymbol { u }\boldsymbol {\beta }\boldsymbol {\beta }$ decay half-life of 76Ge, necessitating an order of magnitude reduction in background with respect to the state of the art. This will require the implementation of a dedicated application specific integrated circuit (ASIC) preamplifier that will significantly lower background contribution compared to the conventional low-mass front end (LMFE) employed in the Majorana Demonstrator and LEGEND-200 experiments... https://escholarship.org/uc/item/58z6z10q Fri, 5 Jun 2026 00:00:00 +0000 Drobizhev, Alexey https://orcid.org/0009-0004-7262-3028 Gnani, Dario https://orcid.org/0000-0003-0464-9176 Grace, Carl Matsumoto, Ryutaro Papadopoulou, Aikaterini https://orcid.org/0000-0001-9440-6076 Poon, Alan https://orcid.org/0000-0003-2684-6402 Schlueter, Lisa Schuetz, Ann-Kathrin Wright, Will Turqueti, Marcos https://orcid.org/0000-0002-3892-1353 https://escholarship.org/uc/item/8vm1k5vr Recently, IceCube reported neutrino emission from the Seyfert galaxy NGC 1068. Using 13.1 yr of IceCube data, we present a follow-up search for neutrino sources in the northern sky. NGC 1068 remains the most significant neutrino source among 110 preselected gamma-ray emitters while also being spatially compatible with the most significant location in the northern sky. Its energy spectrum is characterized by an unbroken power-law with spectral index γ = 3.4 ± 0.2. Consistent with previous results, the observed neutrino flux exceeds its gamma-ray counterpart by at least 2 orders of magnitude. Motivated by this disparity and the high X-ray luminosity of the source, we selected 47 X-ray-bright Seyfert galaxies from the Swift/BAT spectroscopic survey that were not included in the list of gamma-ray emitters. When testing this collection for neutrino emission, we observe a 3.3σ excess from an ensemble of 11 sources, with NGC 1068 excluded from the sample. Our results strengthen the evidence... https://escholarship.org/uc/item/8vm1k5vr Wed, 27 May 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Ding, T Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/26p4j7fc The IceCube Neutrino Observatory has observed extragalactic astrophysical neutrinos with an apparently isotropic distribution. Only a small fraction of the observed astrophysical neutrinos can be explained by known sources. Neutrino production is thought to occur in energetic environments that are ultimately powered by the gravitational collapse of dense regions of the large-scale mass distribution in the universe. Whatever their identity, neutrino sources likely trace this large-scale mass distribution. The clustering of neutrinos with a tracer of the large-scale structure may provide insight into the distribution of neutrino sources with respect to redshift and the identity of neutrino sources. We implement a two-point angular cross correlation of the Northern sky track events with an infrared galaxy catalog derived from the Wide-field Infrared Survey Explorer (WISE) and Two Micron All Sky Survey (2MASS) source catalogs, which trace the nearby large-scale structure. No statistically... https://escholarship.org/uc/item/26p4j7fc Wed, 27 May 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Ding, T Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/6333c24f IceCube recently reported the observation of TeV neutrinos from the nearby Seyfert galaxy NGC 1068, and the corresponding neutrino flux is significantly higher than the upper limit implied by observations of GeV–TeV gamma rays. This suggests that neutrinos are produced near the supermassive black hole, where the radiation density is high enough to obscure gamma rays. We use a set of muon neutrinos with interaction vertices inside the detector, which have good sensitivity to sources in the southern sky, from IceCube data recorded between 2011 and 2021. We then search for individual and collective neutrino signals from 14 Seyfert galaxies in the southern sky selected from the Swift Burst Alert Telescope AGN Spectroscopic Survey. Using the correlations between keV X-rays and TeV neutrinos predicted by disk–corona models, and assuming production characteristics similar to NGC 1068, a collective neutrino signal search reveals an excess of 6.7−3.2+4.0 events, which is inconsistent with... https://escholarship.org/uc/item/6333c24f Fri, 15 May 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, S BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Ding, T Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eldridge, C Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/1g79m654 The large-scale structure of the Universe and its evolution encapsulate a wealth of cosmological information. A powerful means of unlocking this knowledge lies in measuring the auto-power spectrum and/or the cross-power spectrum of the galaxy density and momentum fields, followed by the estimation of cosmological parameters based on these spectrum measurements. In this study, we generalize the cross-power spectrum model to accommodate scenarios in which the density and momentum fields are derived from distinct galaxy surveys. The growth rate of the large-scale structures of the Universe, commonly represented as fσ 8 , was extracted by jointly fitting the monopole and quadrupole moments of the auto-density power spectrum, the monopole of the auto-momentum power spectrum, and the dipole of the cross-power spectrum. Our estimators, theoretical models, and parameter-fitting framework were tested using mocks, confirming their robustness and accuracy in retrieving the fiducial growth... https://escholarship.org/uc/item/1g79m654 Thu, 14 May 2026 00:00:00 +0000 Qin, F Blake, C Howlett, C Turner, RJ Lodha, K Bautista, J Lai, Y Amsellem, AJ Aguilar, J Ahlen, S Bianchi, D Brooks, D BenZvi, S Carr, A Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A de la Macorra, A Douglass, K Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Herrera-Alcantar, HK Honscheid, K Huterer, D Ishak, M Joyce, R Kim, AG https://orcid.org/0000-0001-6315-8743 Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Miquel, R Moustakas, J Muñoz-Gutiérrez, A Nadathur, S Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Ross, C Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Said, K Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zarrouk, P Zhou, R Zou, H https://escholarship.org/uc/item/5850m6j7 Vibrations from experimental setups and the environment are a persistent source of noise for low-temperature calorimeters searching for rare events, including neutrinoless double beta (0νββ) decay or dark matter interactions. Such noise can significantly limit experimental sensitivity to the physics case under investigation. Here, we report the detection of marine microseismic vibrations using mK-scale calorimeters. This study employs a multi-device analysis correlating data from CUORE, the leading experiment in the search for 0νββ decay with mK-scale calorimeters, and the Copernicus Earth Observation program, revealing the seasonal impact of Mediterranean Sea activity on CUORE’s energy thresholds, resolution, and sensitivity over four years. The detection of marine microseisms underscores the need to address faint environmental noise in ultra-sensitive experiments. Understanding how such noise couples to the detector and developing mitigation strategies is essential for next-generation... https://escholarship.org/uc/item/5850m6j7 Wed, 6 May 2026 00:00:00 +0000 Adams, DQ Alduino, C Alfonso, K Armatol, A Avignone, FT Azzolini, O Bari, G Bellini, F Benato, G Beretta, M Biassoni, M Branca, A Brofferio, C Bucci, C Camilleri, J Caminata, A Campani, A Cao, J Capelli, C Capelli, S Cappelli, L Cardani, L Carniti, P Casali, N Celi, E Chiesa, D Clemenza, M Copello, S Cremonesi, O Creswick, RJ D’Addabbo, A Dafinei, I Dell’Oro, S Domizio, S Di Lorenzo, S Di Fang, DQ Faverzani, M Ferri, E Ferroni, F Fiorini, E Franceschi, MA Freedman, SJ Fu, SH Fujikawa, BK Ghislandi, S Giachero, A Girola, M Gironi, L Giuliani, A Gorla, P Gotti, C Guillaumon, PV Gutierrez, TD Han, K Hansen, EV Heeger, KM Helis, DL Huang, HZ https://orcid.org/0000-0002-6760-2394 Hurst, MT Keppel, G Kolomensky, Yu G Kowalski, R Liu, R Ma, L Ma, YG Marini, L Maruyama, RH Mayer, D Mei, Y Moore, MN Napolitano, T Nastasi, M Nones, C Norman, EB https://orcid.org/0000-0002-8876-5897 Nucciotti, A Nutini, I O’Donnell, T Olmi, M Oregui, BT Pagan, S Pagliarone, CE Pagnanini, L Pallavicini, M Pattavina, L Pavan, M Pessina, G Pettinacci, V Pira, C Pirro, S Pottebaum, EG Pozzi, S Previtali, E Puiu, A Quitadamo, S Ressa, A Rosenfeld, C Schmidt, B Serino, R Shaikina, A Sharma, V https://escholarship.org/uc/item/66x0511j In 2021 May the Dark Energy Spectroscopic Instrument (DESI) collaboration began a 5 yr spectroscopic redshift survey to produce a detailed map of the evolving three-dimensional structure of the Universe between z = 0 and z ≈ 4. DESI’s principal scientific objectives are to place precise constraints on the equation of state of dark energy, the gravitationally driven growth of large-scale structure, and the sum of the neutrino masses, and to explore the observational signatures of primordial inflation. We present DESI DR1, which consists of all data acquired during the first 13 months of the DESI main survey, as well as a uniform reprocessing of the DESI Survey Validation data, which were previously made public in the DESI Early Data Release. The DR1 main survey includes high-confidence redshifts for 18.7M objects, of which 13.1M are spectroscopically classified as galaxies, 1.6M as quasars, and 4M as stars, making DR1 the largest sample of extragalactic redshifts ever assembled.... https://escholarship.org/uc/item/66x0511j Tue, 5 May 2026 00:00:00 +0000 Collaboration, DESI Karim, M Abdul Adame, AG Aguado, D Aguilar, J Ahlen, S Alam, S Aldering, G Alexander, DM Alfarsy, R Allen, L Prieto, C Allende Alves, O Anand, A https://orcid.org/0000-0003-2923-1585 Andrade, U Armengaud, E Avila, S Aviles, A Awan, H Bailey, S https://orcid.org/0000-0003-4162-6619 Lizancos, A Baleato Ballester, O Bault, A Bautista, J Bean, R Behera, J BenZvi, S Silva, L Beraldo E Bermejo-Climent, JR Beutler, F Bianchi, D Blake, C Blum, R Bolton, AS Bonici, M Brieden, S Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Buckley-Geer, E Burtin, E Byström, A Canning, R Rosell, A Carnero Carr, A Carrilho, P Casas, L Castander, FJ Cereskaite, R Cervantes-Cota, JL Chaussidon, E Chaves-Montero, J Chen, S Chen, X Circosta, C Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cole, S Cooper, AP Cousinou, M-C Cuceu, A https://orcid.org/0000-0002-2169-0595 Davis, TM Dawson, KS de Belsunce, R de la Cruz, R de la Macorra, A de Mattia, A Deiosso, N Della Costa, J Demina, R Demirbozan, U DeRose, J Dey, A Dey, B Ding, J Ding, Z Doel, P Douglass, K Dowicz, M Ebina, H Edelstein, J Eisenstein, DJ Elbers, W Emas, N Escoffier, S Fagrelius, P Fan, X Fanning, K Favole, G Fawcett, VA Fernández-García, E Ferraro, S https://orcid.org/0000-0003-4992-7854 Findlay, N Font-Ribera, A Forero-Romero, JE Forero-Sánchez, D Frenk, CS Gänsicke, BT Galbany, L García-Bellido, J Garcia-Quintero, C Garrison, LH https://escholarship.org/uc/item/113230xt Recent advances in cosmological observations have provided an unprecedented opportunity to investigate the distribution of baryons relative to the underlying matter. In this work, we show that the gas is more extended than the dark matter, and the amount of baryonic feedback at z≲1 disfavors low-feedback models such as that of state-of-the-art hydrodynamical simulation IllustrisTNG compared with high-feedback models such as that of the original Illustris simulation. This has important implications for bridging the gap between theory and observations and understanding galaxy formation and evolution. Furthermore, a better grasp of the baryon-dark matter link is critical to future cosmological analyses, which are currently impeded by our limited knowledge of baryonic feedback. Here, we measure the kinematic Sunyaev-Zel’dovich (kSZ) effect from the Atacama Cosmology Telescope, stacked on the luminous red galaxy sample of the Dark Energy Spectroscopic Instrument (DESI) imaging survey.... https://escholarship.org/uc/item/113230xt Tue, 5 May 2026 00:00:00 +0000 Hadzhiyska, B Ferraro, S Guachalla, B Ried Schaan, E Aguilar, J Ahlen, S Battaglia, N Bond, JR Brooks, D Calabrese, E Choi, SK https://orcid.org/0000-0002-9113-7058 Claybaugh, T https://orcid.org/0000-0002-5024-6987 Coulton, WR Dawson, K Devlin, M Dey, B Doel, P Duivenvoorden, AJ Dunkley, J Farren, GS https://orcid.org/0000-0001-5704-1127 Font-Ribera, A Forero-Romero, JE Gallardo, PA Gaztañaga, E Gontcho, S Gontcho Gralla, M Le Guillou, L Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hill, JC Hložek, R Honscheid, K Juneau, S Kehoe, R Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M Liu, RH Louis, T MacCrann, N de Macorra, A Madhavacheril, M Manera, M Meisner, A Miquel, R Moodley, K Moustakas, J Mroczkowski, T Naess, S Newman, J Niemack, MD Niz, G Page, L Palanque-Delabrouille, N Partridge, B Percival, WJ Prada, F Qu, FJ Rossi, G Sanchez, E Schlegel, D Schubnell, M Sherwin, B Sehgal, N Seo, H Sifón, C Spergel, D Sprayberry, D Staggs, S Tarlé, G Vargas, C Vavagiakis, EM Weaver, BA Wollack, EJ Zhou, R Zou, H https://escholarship.org/uc/item/2jt500hd We present a 9.3σ detection of the pairwise kinematic Sunyaev-Zel’dovich (kSZ) effect by combining a sample of 913,286 Luminous Red Galaxies (LRGs) from the Dark Energy Spectroscopic Instrument Data Release 1 (DESI DR1) catalog and coadded Atacama Cosmology Telescope (ACT DR6) and Planck cosmic microwave background (CMB) temperature maps. This represents the highest-significance pairwise kSZ measurement to date. The analysis uses three ACT CMB temperature maps: coadded 150 GHz, total frequency maps, and a component separated Internal Linear Combination (ILC) map, all of which cover 19,000 square degrees of the sky from Advanced ACTPol observations conducted between 2017 and 2022. Comparison of the results of these three maps serves as a consistency check for potential foreground contamination that may depend on the observation frequency. An estimate of the best-fit mass-averaged optical depth is obtained by comparing the pairwise kSZ curve with the linear theory prediction of... https://escholarship.org/uc/item/2jt500hd Thu, 23 Apr 2026 00:00:00 +0000 Gong, Yulin Gallardo, Patricio A Bean, Rachel Moore, Jenna Vavagiakis, Eve M Battaglia, Nicholas Hadzhiyska, Boryana Hsu, Yun-Hsin Aguilar, Jessica Nicole Ahlen, Steven Bianchi, Davide Brooks, David Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 Canning, Rebecca Devlin, Mark Doel, Peter de la Macorra, Axel Ferraro, Simone Font-Ribera, Andreu Forero-Romero, Jaime E Gaztañaga, Enrique Gutierrez, Gaston Gontcho, Satya Gontcho A Guy, Julien https://orcid.org/0000-0001-9822-6793 Honscheid, Klaus Howlett, Cullan Liu, R Henry Ishak, Mustapha Joyce, Dick Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Lamman, Claire Levi, Michael Landriau, Martin Manera, Marc Meisner, Aaron Miquel, Ramon Niemack, Michael D Nadathur, Seshadri Percival, Will Prada, Francisco Rossi, Graziano Guachalla, Bernardita Ried Sanchez, Eusebio Seo, Hee-Jong Sprayberry, David Schlegel, David Sifón, Cristóbal Schubnell, Michael Silber, Joseph Harry https://orcid.org/0000-0002-3461-0320 Tarlé, Gregory Weaver, Benjamin Alan Zhou, Rongpu Zou, Hu https://escholarship.org/uc/item/9jw307fh Since the emergence of laser-plasma accelerators (LPAs), substantial work has been dedicated to using LPAs to drive free-electron lasers (FELs) for a broad range of applications. Despite recent breakthroughs, which have proven the fundamental feasibility of operating FELs with an LPA source, stable FEL operation over multiple hours without operator input had yet to be achieved. In this work, we report significant improvements to the stability of a hundred terawatt laser system, resulting in successful demonstration of reliable, long-term operation of an LPA-driven FEL in the self-amplified spontaneous emission (SASE) regime at 420 nm. The LPA source delivered 100 MeV electron beams at 1 Hz with high stability over more than 10 h, enabling over 8 h of continuous FEL operation without operator input. The acquired data were subsequently used to investigate correlations between the measured undulator radiation and parameters of the drive laser, plasma source,... https://escholarship.org/uc/item/9jw307fh Wed, 22 Apr 2026 00:00:00 +0000 Kohrell, F Barber, SK Doss, CE https://orcid.org/0000-0001-5042-2744 Jensen, K Schröder, S Berger, C Eisentraut, Z Nakamura, K https://orcid.org/0000-0001-9842-7114 Gonsalves, AJ https://orcid.org/0000-0002-2567-7582 Isono, F Plateau, GR van Mourik, RA Gracia-Linares, M Labun, L Hegelich, BM Milton, SV Geddes, CGR Osterhoff, J https://orcid.org/0000-0002-7684-0140 Esarey, EH Schroeder, CB https://orcid.org/0000-0002-9610-0166 Grüner, F van Tilborg, J https://escholarship.org/uc/item/7849z8p9 The second data release (DR2) of the Dark Energy Spectroscopic Instrument (DESI), containing data from the first three years of observations, doubles the number of Lyman-α (Lyα) forest spectra in DR1 and it provides the largest dataset of its kind. To ensure a robust validation of the baryonic acoustic oscillation (BAO) analysis using Lyα forests, we have made significant updates compared to DR1 to both the mocks and the analysis framework used in the validation. In particular, we present CoLoRe-QL, a new set of Lyα mocks that use a quasilinear input power spectrum to incorporate the nonlinear broadening of the BAO peak. We have also increased the number of realizations used in the validation to 400, compared to the 150 realizations used in DR1. Finally, we present a detailed study of the impact of quasar redshift errors on the BAO measurement, and we compare different strategies to mask damped Lyman-α absorbers in our spectra. The BAO measurement from the Lyα dataset of DESI... https://escholarship.org/uc/item/7849z8p9 Thu, 16 Apr 2026 00:00:00 +0000 Casas, L Herrera-Alcantar, HK Chaves-Montero, J Cuceu, A https://orcid.org/0000-0002-2169-0595 Font-Ribera, A Lokken, M Abdul-Karim, M Ramírez-Pérez, C Alonso, D Aguilar, J Ahlen, S Andrade, U Armengaud, E Aviles, A Bailey, S https://orcid.org/0000-0003-4162-6619 BenZvi, S Bianchi, D Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Canning, R Rosell, A Carnero Charles, M Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 Dawson, KS de la Macorra, A de Mattia, A Dey, Arjun Dey, Biprateep Ding, Z Doel, P Eisenstein, DJ Elbers, W Ferraro, S Forero-Romero, JE Garcia-Quintero, C Garrison, Lehman H Gaztañaga, E Gil-Marín, H Gontcho, S Gontcho A Gonzalez-Morales, AX Gordon, C Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Herbold, M Honscheid, K Howlett, C Huterer, D Ishak, M Juneau, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Landriau, M Le Goff, JM Le Guillou, L Leauthaud, A Levi, ME Li, Q Manera, M Martini, P Meisner, A Mena-Fernández, J Miquel, R Moustakas, J Santos, D Muñoz Myers, AD Nadathur, S Napolitano, L Niz, G Noriega, HE Paillas, E Palanque-Delabrouille, N Percival, WJ Pieri, Matthew M Poppett, C Prada, F Pérez-Ràfols, I Ravoux, C Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Sinigaglia, F Sprayberry, D Tan, T Tarlé, G Taylor, P Turner, W Vargas-Magaña, M Walther, M Weaver, BA Wolfson, M Yèche, C Zarrouk, P Zhou, R https://escholarship.org/uc/item/9hh8w4jf In the IceCube Neutrino Observatory, a signal of astrophysical neutrinos is obscured by backgrounds from atmospheric neutrinos and muons produced in cosmic-ray interactions. IceCube event selections used to isolate the astrophysical neutrino signal often focus on the morphology of the light patterns recorded by the detector. The analyses presented here use the new IceCube Enhanced Starting Track Event Selection (ESTES), which identifies events likely generated by muon–neutrino interactions within the detector geometry, focusing on neutrino energies of 1–500 TeV with a median angular resolution of 1.4 ° . Selecting for starting-track events filters out not only the atmospheric-muon background but also the atmospheric-neutrino background in the southern sky. This improves IceCube’s muon–neutrino sensitivity to southern-sky neutrino sources, especially for Galactic sources that are not expected to produce a substantial flux of neutrinos above 100 TeV. In this work, the ESTES sample... https://escholarship.org/uc/item/9hh8w4jf Fri, 10 Apr 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X V., A Balagopal Baricevic, M Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Beise, J Bellenghi, C BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Brostean-Kaiser, J Brusa, L Burley, RT Butterfield, D Campana, MA Caracas, I Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Deng, S Desai, A Desiati, P de Vries, KD de Wasseige, G DeYoung, T Diaz, A Díaz-Vélez, JC Dierichs, P Dittmer, M Domi, A Draper, L Dujmovic, H Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Mentawi, S El Elsässer, D Engel, R Erpenbeck, H Esmail, W Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N Fiedlschuster, S https://escholarship.org/uc/item/2w59861v The Advanced Light Source (ALS) at LBNL is upgrading several LLRF systems for its Linac and Sub-Harmonic Bunchers, where it is desired to have a unified LLRF system design to support various RF frequencies (at 125MHz, 500MHz and 3GHz) and configurations. This paper demonstrates an open-source, direct sampling RFSoC based LLRF system design, featuring: sample-to-sample Multi-Tile Synchronization, deterministic latency, digital up/down conversion, arbitrary waveform generation and acquisition, in-pulse closed loop control, timing and EPICS integration, modular RF frontend and hardware designs. Measured RF characteristics show that the RFSoC based LLRF system is able to meet the system requirements. https://escholarship.org/uc/item/2w59861v Tue, 31 Mar 2026 00:00:00 +0000 Du, Qiang https://orcid.org/0000-0002-2196-9801 Murthy, Shreeharshini Moore, Victoria Lopez, Angel Jurado Chin, Michael Basak, Shree Subhasish Nett, David Flugstad, Benjamin https://escholarship.org/uc/item/6h19k6jc To reach high collision energy for future high-energy particle colliders, like the Future Circular Collider (FCC) or the Muon Collider, it is required to achieve high field strength of the bending dipoles. Currently, the practical limit for Nb$_{\text{3}}$ Sn technology is around 16 T and, in order to further increase the magnetic field, the superconducting magnet community is considering High Temperature Superconductors (HTS), in particular Bi-2212 and REBCO conductors. However, their relevant higher cost has led the community to consider a hybrid approach where HTS materials are used in the high field region of the coils with so-called insert coils, and Low Temperature Superconductors are involved in the lower field part ($< $ 16 T) with so-called outsert coils. This paper describes the conceptual mechanical design of a 20 T hybrid cos$\theta$ dipole configuration. The high stress levels that the structure is facing due to the high magnetic field are discussed. Moreover,... https://escholarship.org/uc/item/6h19k6jc Tue, 24 Mar 2026 00:00:00 +0000 D'Addazio, Marika Ferracin, Paolo Marinozzi, Vittorio Ravaioli, Emmanuele Vallone, Giorgio https://orcid.org/0000-0003-0716-8116 Savoldi, Laura https://escholarship.org/uc/item/3fh431f8 Despite extensive efforts, discovery of high-energy astrophysical neutrino sources remains elusive. We present an event-level simultaneous maximum likelihood analysis of tracks and cascades using IceCube data collected from 2008 April 6 to 2022 May 23 to search the whole sky for neutrino sources, and using a source catalog, for coincidence of neutrino emission with gamma-ray emission. This is the first time a simultaneous fit of different detection channels is used to conduct a time-integrated all-sky scan with IceCube. Combining all-sky tracks, with superior pointing power and sensitivity in the northern sky, with all-sky cascades, with good energy resolution and sensitivity in the southern sky, we have developed the most sensitive point-source search to date by IceCube that targets the entire sky. The most significant point in the northern sky aligns with NGC 1068, a Seyfert II galaxy, which, from the catalog search, shows a 3.5σ excess over background after accounting for trials.... https://escholarship.org/uc/item/3fh431f8 Mon, 23 Mar 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Ali, S Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X Baines-Holmes, J V., A Balagopal Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Behrens, P Beise, J Bellenghi, C Benkel, B BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bodo, I Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Burley, RT Butterfield, D Campana, MA Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Borja, DA Coloma Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Delmeulle, T Deng, S Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC DiKerby, S Dittmer, M Domi, A Draper, L Dueser, L Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Elsässer, D Engel, R Erpenbeck, H Esmail, W Eulig, S Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N https://escholarship.org/uc/item/29k195dm High-temperature REBa$_{2}$Cu$_{3}$O$_{7-x}$ (REBCO) superconductors are a route to increase the field of accelerator magnets beyond the 15-16T practical limit of Nb$_{3}$Sn. REBCO cabled in a CORC geometry is a promising fit for this application, enabling the design of low inductance magnets with conductor transposition. However, the use of CORC in coils with the tight conductor bending radii typical of accelerator magnets remains a key challenge, with on-going research both on the conductor development and coil design fronts seeking to address this issue. In this work we explore the tradeoffs between circular and elliptic aperture canted-cosine-theta (CCT) coils when the conductor minimum bending radius is a key consideration, concluding that aperture ellipticity is an important free parameter in the optimization of magnetically efficient CORC dipole magnets. In particular, we show that elliptic bore designs enable a regime of smaller aperture HTS coils, an important result... https://escholarship.org/uc/item/29k195dm Thu, 19 Mar 2026 00:00:00 +0000 Brouwer, L https://orcid.org/0000-0003-2170-7278 Yan, Y https://orcid.org/0000-0001-9647-5622 Wang, X https://orcid.org/0000-0001-7065-8615 Croteau, JF Ferracin, P Fernandez, JL Rudeiros Saravanan, A https://orcid.org/0009-0006-9154-6632 https://escholarship.org/uc/item/2ks5b3d4 Liquid argon time projection chambers (LArTPCs) rely on highly pure argon to ensure that ionization electrons produced by charged particles reach readout arrays. ProtoDUNE Single-Phase (ProtoDUNE-SP) was an approximately 700-ton liquid argon detector intended to prototype the Deep Underground Neutrino Experiment (DUNE) Far Detector Horizontal Drift module. It contains two drift volumes bisected by the cathode plane assembly, which is biased to create an almost uniform electric field in both volumes. The DUNE Far Detector modules must have robust cryogenic systems capable of filtering argon and supplying the TPC with clean liquid. This paper will explore comparisons of the argon purity measured by the purity monitors with those measured using muons in the TPC from October 2018 to November 2018. A new method is introduced to measure the liquid argon purity in the TPC using muons crossing both drift volumes of ProtoDUNE-SP. For extended periods on the timescale of weeks, the drift... https://escholarship.org/uc/item/2ks5b3d4 Mon, 16 Mar 2026 00:00:00 +0000 Abbaslu, S Abud, A Abed Acciarri, R Accorsi, LP Acero, MA Adames, MR Adamov, G Adamowski, M Adriano, C Akbar, F Alemanno, F Alex, NS Allison, K Alrashed, M Alton, A Alvarez, R Alves, T Aman, A Amar, H Amedo, P Anderson, J Andrade, DA Andreopoulos, C Andreotti, M Andrews, MP Andrianala, F Andringa, S Anjarazafy, F Ansarifard, S Antic, D Antoniassi, M Aranda-Fernandez, A Arellano, L Diaz, E Arrieta Arroyave, MA Arteropons, M Asaadi, J Ascencio, M Ashkenazi, A Asner, D Asquith, L Atkin, E Auguste, D Aurisano, A Aushev, V Autiero, D Gómez, D Ávila Azam, MB Azfar, F Back, A Back, JJ Bae, Y Bagaturia, I Bagby, L Baigarashev, D Balasubramanian, S Balboni, A Baldi, P https://orcid.org/0000-0003-0636-7930 Baldini, W Baldonedo, J Baller, B Bambah, B Barao, F Barbu, D Barenboim, G Alzás, P Barham Barker, GJ Barkhouse, W Barr, G Barros, A Barros, N Barrow, D Barrow, JL Basharina-Freshville, A Bashyal, A Basque, V Bassani, M Basu, D Batchelor, C Bathe-Peters, L Battat, JBR Battisti, F Bautista, J Bay, F Alba, JLL Bazo Beacom, JF Bechetoille, E Behera, B Belchior, E Bell, B Bell, G Bellantoni, L Bellettini, G Bellini, V Beltramello, O Belyaev, A Montiel, C Benitez Benjamin, D Neves, F Bento Berger, J https://escholarship.org/uc/item/1kc9d803 A demonstrative NbTi based Mixed Axial and Radial field System (MARS-D) is being developed for a next-Generation Electron Cyclotron Resonance Ion Source (ECRIS) at Lawrence Berkeley National Laboratory (LBL), which employs a novel closed-loop coil design scheme that more efficiently utilizes conductor fields and extend the application of NbTi for high frequency (up to 45 GHz) ECR operation. The NbTi MARS-D magnet consists of a single hexagonally shaped closed-loop coil and a set of auxiliary solenoids. A cryostat for cooling the MARS-D magnet is under design at LBL. The MARS-D magnet working around 4.2 K will be bath-cooled in liquid helium using multiple two-stage cryocoolers. An intermediate temperature thermal radiation shield is adopted to reduce the heat leakage imposed on 4.2 K coil cold mass from room temperature. The thermal shield is conduction-cooled by the first-stage cold heads of four two-stage cryocoolers and the cold head of a single-stage cryocooler shared with... https://escholarship.org/uc/item/1kc9d803 Wed, 11 Mar 2026 00:00:00 +0000 Wang, L Benitez, JY https://orcid.org/0000-0002-4596-1484 Duran, JC Todd, D Xu, L Yang, Y https://orcid.org/0000-0001-6845-9297 https://escholarship.org/uc/item/0zd8109d The current Electron Cyclotron Resonance Ion Sources (ECRISs), constructed with Nb-Ti wires and the conventional racetrack-and-solenoid structure, have achieved operating frequencies up to 28 GHz and utilized about 90% of the critical current of the Nb-Ti wire. A Mixed Axial and Radial field System Demonstrator (MARS-D) is being developed at Lawrence Berkeley National Laboratory (LBNL). This system, which consists of an innovative hexagonal Closed-Loop Coil (CLC) and a set of solenoids, can generate higher magnetic fields (up to 150% ) while requiring only about 50% of the superconducting wire, enabling Nb-Ti wires to be used in the next-generation 45 GHz ECRIS. However, the assembly and cooling of such an efficient and compact magnet are particularly challenging due to the small radial gap between the CLC and solenoids, as well as the tight operating temperature margin. To address these challenges, a structure was developed that combines a three-section radially split solenoid... https://escholarship.org/uc/item/0zd8109d Wed, 11 Mar 2026 00:00:00 +0000 Xu, Lianrong Benitez, Janilee https://orcid.org/0000-0002-4596-1484 Duran, Jaime Cruz Ferracin, Paolo Juchno, Mariusz Phair, Larry https://orcid.org/0000-0003-0706-5512 Todd, Damon Wang, Li Yang, Ye https://orcid.org/0000-0001-6845-9297 https://escholarship.org/uc/item/7ft016v9 The complexity of information processing in the brain requires development of technologies that can provide spatial and temporal resolution by means of dense electrode arrays paired with high-channel count signal acquisition electronics. In this work, we describe a highly flexible neural readout application-specific integrated circuit (ASIC) that successfully integrates 512 channels on a dense 8.2mm x 6.8mm 2D layout. Each DC coupled channel features a gain and bandwidth programmable analog front-end, and 14b 30kS/s analog-to-digital conversion. The chip was fabricated in a 0.18um 1.8V CMOS technology and dissipates a total of 125mW. The chip is bump-bonded on a base circuit board, creating an ultralight 350mg flexible module, which can be used in a single or multi-module system with a variety of electrode arrays. https://escholarship.org/uc/item/7ft016v9 Tue, 10 Mar 2026 00:00:00 +0000 Papadopoulou, Aikaterini https://orcid.org/0000-0001-9440-6076 Hermiz, John Grace, Carl Denes, Peter https://escholarship.org/uc/item/2x40p1jm A 16-channel analog front-end integrated circuit (IC) for interfacing an image sensor with single-ended analog output to a differential-input digitizer is presented. The IC is designed for image sensors used in single-electron counting direct detection cameras with applications in cryogenic electron microscopy (cryo-EM), but it’s high flexibility allows usage with a variety of sensors. An operational transconductance amplifier (OTA) and a transimpedance amplifier (TIA) replace the traditional instrumentation amplifier, to allow power reduction and decoupling of the gain and bandwidth stages. This allows for a tunable gain in order to exploit the digitizer full-scale range, and an independent bandwidth tuning capability to accommodate a variety of sensors. Additionally, the front-end supports a very wide input common-mode range, and provides offset correction capability as well as frame marker operation. The chip is fabricated in a commercially available 180nm CMOS technology using... https://escholarship.org/uc/item/2x40p1jm Tue, 10 Mar 2026 00:00:00 +0000 Papadopoulou, Aikaterini https://orcid.org/0000-0001-9440-6076 Grace, Carl Denes, Peter Karcher, Armin https://escholarship.org/uc/item/1qk3t2w5 A dual strong-arm (DSA) comparator is designed targeting at low-voltage operation in deeply-scaled technologies. The addition of a second regenerative latch helps reduce both offset sensitivity and offset while maintaining comparable or better performance as a conventional double-tail latch across a wide range of voltages. A large comparator offset measurement array is fabricated in a 28nm FDSOI process. The DSA offset is measured to be 8.5mV across 6 dies, approximately 30% lower than the conventional topology at iso-area and iso-capacitance conditions. It is also shown to scale well with supply and common-mode voltage, achieving up to 65% lower offset across the voltage range. https://escholarship.org/uc/item/1qk3t2w5 Tue, 10 Mar 2026 00:00:00 +0000 Papadopoulou, Aikaterini https://orcid.org/0000-0001-9440-6076 Milovanović, Vladimir Nikolić, Borivoje https://escholarship.org/uc/item/0sj1h6rn Erratum: DESI 2024 V: Full-Shape Galaxy Clustering from Galaxies and Quasars https://escholarship.org/uc/item/0sj1h6rn Tue, 10 Mar 2026 00:00:00 +0000 Adame, AG Aguilar, J Ahlen, S Alam, S Alexander, DM Alvarez, M Alves, O Anand, A https://orcid.org/0000-0003-2923-1585 Andrade, U Armengaud, E Avila, S Aviles, A Awan, H Bailey, S https://orcid.org/0000-0003-4162-6619 Baltay, C Bault, A Behera, J BenZvi, S Beutler, F Bianchi, D Blake, C Blum, R Brieden, S Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Buckley-Geer, E Burtin, E Calderon, R Canning, R Rosell, A Carnero Cereskaite, R Cervantes-Cota, JL Chabanier, S Chaussidon, E Chaves-Montero, J Chen, S Chen, X Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cole, S Cuceu, A https://orcid.org/0000-0002-2169-0595 Davis, TM Dawson, K de la Macorra, A de Mattia, A Deiosso, N Dey, A Dey, B Ding, Z Doel, P Edelstein, J Eftekharzadeh, S Eisenstein, DJ Elliott, A Fagrelius, P Fanning, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Ereza, J Findlay, N Flaugher, B Font-Ribera, A Forero-Sánchez, D Forero-Romero, JE Garcia-Quintero, C Garrison, LH Gaztañaga, E Gil-Marín, H Gontcho, S Gontcho A Gonzalez-Morales, AX Gonzalez-Perez, V Gordon, C Green, D Gruen, D Gsponer, R Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hadzhiyska, B Hahn, C Hanif, MMS Herrera-Alcantar, HK Honscheid, K Howlett, C Huterer, D Iršič, V Ishak, M Juneau, S Karaçaylı, NG Kehoe, R Kent, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kong, H Koposov, SE Kremin, A https://orcid.org/0000-0001-6356-7424 Krolewski, A Lai, Y Lan, T-W Landriau, M https://orcid.org/0000-0003-1838-8528 Lang, D Lasker, J Le Goff, JM Le Guillou, L https://escholarship.org/uc/item/30b6q2d1 The Lyman-α forests observed in the spectra of high-redshift quasars can be used as a tracer of the cosmological matter density to study baryon acoustic oscillations (BAO) and the Alcock-Paczynski effect. Extraction of cosmological information from these studies requires modeling of the forest correlations. While the models depend most importantly on the bias parameters of the intergalactic medium (IGM), they also depend on the numbers and characteristics of high-column-density systems (HCDs) ranging from Lyman-limit systems with column densities log N HI/1cm-2 > 17 to damped Lyman-α systems (DLAs) with log N HI/1cm-2 > 20.2. These HCDs introduce broad damped absorption characteristic of a Voigt profile. Consequently they imprint a component on the power spectrum whose modes in the radial direction are suppressed, leading to a scale-dependent bias. Using mock data sets of known HCD content, we test a model that describes this effect in terms of the distribution of column... https://escholarship.org/uc/item/30b6q2d1 Thu, 5 Mar 2026 00:00:00 +0000 Tan, T Rich, J Chaussidon, E Le Goff, JM Balland, C Armengaud, E Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Doel, P Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Herrera-Alcantar, HK Honscheid, K Ishak, M Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Martini, P Miquel, R Nadathur, S Palanque-Delabrouille, N Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Walther, M Weaver, BA Zou, H https://escholarship.org/uc/item/9hs8m826 Emission Line Galaxies (ELGs) are one of the main tracers that the Dark Energy Spectroscopic Instrument (DESI) uses to probe the universe. However, they are afflicted by strong spurious correlations between target density and observing conditions known as imaging systematics. In this paper, we present the imaging systematics mitigation applied to the DESI Data Release 1 (DR1) large-scale structure catalogs used in the DESI 2024 cosmological analyses. We also explore extensions of the fiducial treatment. This includes a combined approach, through forward image simulations (Obiwan) in conjunction with neural network-based regression, to obtain an angular selection function that mitigates the imaging systematics observed in the DESI DR1 ELGs target density. We further derive a line of sight selection function from the forward model that removes the strong redshift dependence between imaging systematics and low redshift ELGs. Combining both angular and redshift-dependent systematics,... https://escholarship.org/uc/item/9hs8m826 Wed, 4 Mar 2026 00:00:00 +0000 Rosado-Marín, AJ Ross, AJ Seo, H Rezaie, M Kong, H de Mattia, A Zhou, R https://orcid.org/0000-0001-5381-4372 Aguilar, J Ahlen, S Alves, O Bianchi, D Brooks, D Burtin, E Chaussidon, E Chen, X Claybaugh, T https://orcid.org/0000-0002-5024-6987 Dawson, KS de la Macorra, A Dey, A Doel, P Fanning, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Hahn, C Hanif, MMS Howlett, C Juneau, S Kehoe, R Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Krolewski, A Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Meisner, A Mena-Fernández, J Miquel, R Moustakas, J Newman, JA Paillas, E Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Raichoor, A https://orcid.org/0000-0001-5999-7923 Rossi, G Ruggeri, R Sanchez, E Schlafly, EF https://orcid.org/0000-0002-3569-7421 Schlegel, D Schubnell, M Sprayberry, D Vargas-Magaña, M Weaver, BA Yu, J Zou, H https://escholarship.org/uc/item/8xn4v0s5 Understanding whether cosmic acceleration arises from a cosmological constant or a dynamical component is a central goal of cosmology, and the Dark Energy Spectroscopic Instrument (DESI) enables stringent tests with high-precision distance measurements. Here we analyse measurements of baryon acoustic oscillations in DESI Data Release 1 and Data Release 2 and consider type Ia supernovae and a distance prior for the cosmic microwave background. With the larger statistical power and wider redshift coverage of Data Release 2, the preference for dynamical dark energy does not diminish relative to Data Release 1. Using both a shape-function reconstruction and non-parametric approaches with a Horndeski-motivated correlation prior, we find that the equation of state for dark energy w(z) varies with redshift. Baryon acoustic oscillation data alone yield modest constraints, but in combination with independent supernova compilations and the prior for the cosmic microwave background, they... https://escholarship.org/uc/item/8xn4v0s5 Wed, 4 Mar 2026 00:00:00 +0000 Gu, Gan Wang, Xiaoma Wang, Yuting Zhao, Gong-Bo Pogosian, Levon Koyama, Kazuya Peacock, John A Cai, Zheng Cervantes-Cota, Jorge L Ishak, Mustapha Shafieloo, Arman Zhao, Ruiyang Ahlen, Steven Bianchi, Davide Brooks, David Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 Cole, Shaun de la Macorra, Axel de Mattia, Arnaud Doel, Peter Ferraro, Simone https://orcid.org/0000-0003-4992-7854 Forero-Romero, Jaime E Gaztañaga, Enrique Gontcho A Gontcho, Satya Gutierrez, Gaston Hahn, ChangHoon Howlett, Cullan Kehoe, Robert Kirkby, David https://orcid.org/0000-0002-8828-5463 Kneib, Jean-Paul Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Lahav, Ofer Landriau, Martin https://orcid.org/0000-0003-1838-8528 Le Guillou, Laurent Leauthaud, Alexie Levi, Michael https://orcid.org/0000-0003-1887-1018 Manera, Marc Meisner, Aaron Miquel, Ramon Moustakas, John Muñoz-Gutiérrez, Andrea Nadathur, Seshadri Newman, Jeffrey A Palanque-Delabrouille, Nathalie Percival, Will Prada, Francisco Pérez-Ràfols, Ignasi Rossi, Graziano Samushia, Lado Sanchez, Eusebio Schlegel, David https://orcid.org/0000-0002-5042-5088 Seo, Hee-Jong Sprayberry, David Tarlé, Gregory Walther, Michael Weaver, Benjamin Alan Zarrouk, Pauline Zhao, Cheng Zhou, Rongpu https://orcid.org/0000-0001-5381-4372 Zou, Hu https://escholarship.org/uc/item/4rs1v5wf The US High-Luminosity LHC Accelerator Upgrade Project (AUP) is responsible for delivering cryo-assemblies for the Q1Q3 quadrupole optical components of the High Luminosity LHC upgrade at CERN. Total of 10 cryo-assemblies containing two Nb3Sn quadrupole magnets per cold mass will be delivered within this program. After the successful test of the first pre-series cryo-assembly in 2023, two more cryo-assemblies were tested at Fermilab's horizontal test facility. Production overview and the test results of the LQXFAB02 and LQXFAB03 cryo-assemblies are summarized in this paper. After the first test, to increase the capability of the horizontal test facility, various improvements have been made. These improvements are also described in this paper. https://escholarship.org/uc/item/4rs1v5wf Wed, 4 Mar 2026 00:00:00 +0000 Chlachidze, Guram Ambrosio, Giorgio Anerella, Michael Apollinari, Giorgio Baldini, Maria DiMarco, Joseph Feher, Sandor Ferracin, Paolo Nikolic, Vladica Nobrega, Fred Orozco, Charles Orris, Darryl Prestemon, Soren https://orcid.org/0000-0002-1937-4040 Rabehl, Roger Stoynev, Stoyan Vouris, Antonios https://escholarship.org/uc/item/4cw6j0rf The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-Zel’dovich effect (kSZ). We precisely measure this effect (S/N≈10) via velocity stacking with 825,283 spectroscopically confirmed luminous red galaxies (LRG) from the Dark Energy Spectroscopic Instrument Year 1 (DESI Y1) survey, which overlap with the Atacama Cosmology Telescope (ACT) Data Release 6 temperature maps over ≥4,000 deg2. We explore the kSZ dependence with various galaxy parameters and find no significant trend with redshift but clear trends with stellar mass and absolute magnitude in g, r, and z bands. Our analysis suggests that the gas extends beyond the dark matter halo (99.5% confidence level, i.e., probability to exceed (PTE)=0.005). We find a tentative preference for hydrodynamical simulation models with stronger feedback that drives gas further out (Illustris z=0.5, PTE=0.37) over... https://escholarship.org/uc/item/4cw6j0rf Wed, 4 Mar 2026 00:00:00 +0000 Guachalla, Bernardita Ried Schaan, Emmanuel Hadzhiyska, Boryana Ferraro, Simone https://orcid.org/0000-0003-4992-7854 Aguilar, Jessica N Ahlen, Steven Battaglia, Nicholas Bianchi, Davide Bond, Richard Brooks, David Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 Coulton, William R de la Macorra, Axel Devlin, Mark J Dey, Arjun Doel, Peter Dunkley, Jo Fanning, Kevin Forero-Romero, Jaime Gaztañaga, Enrique Gontcho, Satya Gontcho A Gutierrez, Gaston Guy, Julien https://orcid.org/0000-0001-9822-6793 Hill, J Colin Honscheid, Klaus Juneau, Stephanie Kisner, Theodore Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Lambert, Andrew Landriau, Martin https://orcid.org/0000-0003-1838-8528 Le Guillou, Laurent MacCrann, Niall Manera, Marc Meisner, Aaron Miquel, Ramon Moodley, Kavilan Moustakas, John Mroczkowski, Tony Myers, Adam D Niemack, Michael D Niz, Gustavo Palanque-Delabrouille, Nathalie Percival, Will Pérez-Ràfols, Ignasi Poppett, Claire Prada, Francisco Qu, Frank J Rossi, Graziano Sanchez, Eusebio Schlegel, David Schubnell, Michael Seo, Hee-Jong Sifón, Cristóbal Spergel, David N Sprayberry, David Tarlé, Gregory Vargas-Magaña, Mariana Vavagiakis, Eve M Weaver, Benjamin A Wollack, Edward J Zarrouk, Pauline https://escholarship.org/uc/item/4849h0w9 We present the one-dimensional Lyman-α forest power spectrum measurement derived from the data release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI). The measurement of the Lyman-α forest power spectrum along the line of sight from high-redshift quasar spectra provides information on the shape of the linear matter power spectrum, neutrino masses, and the properties of dark matter. In this work, we use a Fast Fourier Transform (FFT)-based estimator, which is validated on synthetic data in a companion paper. Compared to the FFT measurement performed on the DESI early data release, we improve the noise characterization with a cross-exposure estimator and test the robustness of our measurement using various data splits. We also refine the estimation of the uncertainties and now present an estimator for the covariance matrix of the measurement. Furthermore, we compare our results to previous high-resolution and eBOSS measurements. In another companion paper, we present... https://escholarship.org/uc/item/4849h0w9 Wed, 4 Mar 2026 00:00:00 +0000 Ravoux, Corentin Abdul-Karim, Marie-Lynn Le Goff, Jean-Marc Armengaud, Eric Aguilar, Jessica N Ahlen, Steven Bailey, Stephen https://orcid.org/0000-0003-4162-6619 Bianchi, Davide Brodzeller, Allyson https://orcid.org/0000-0002-8934-0954 Brooks, David Chaves-Montero, Jonás Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 Cuceu, Andrei https://orcid.org/0000-0002-2169-0595 de Belsunce, Roger de la Macorra, Axel Dey, Arjun Ding, Zhejie Doel, Peter Ferraro, Simone https://orcid.org/0000-0003-4992-7854 Font-Ribera, Andreu Forero-Romero, Jaime E Gaztañaga, Enrique Karaçaylı, Naim Göksel Gontcho, Satya Gontcho A Gutierrez, Gaston Guy, Julien https://orcid.org/0000-0001-9822-6793 Herrera-Alcantar, Hiram K Ishak, Mustapha Kehoe, Robert Kirkby, David https://orcid.org/0000-0002-8828-5463 Kisner, Theodore Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Landriau, Martin https://orcid.org/0000-0003-1838-8528 Le Guillou, Laurent Levi, Michael E https://orcid.org/0000-0003-1887-1018 Manera, Marc Martini, Paul Meisner, Aaron Miquel, Ramon Montero-Camacho, Paulo Muñoz-Gutiérrez, Andrea Nadathur, Seshadri Niz, Gustavo Palanque-Delabrouille, Nathalie Pan, Zhiwei Percival, Will J Pérez-Ràfols, Ignasi Pieri, Matthew M Prada, Francisco Rossi, Graziano Sanchez, Eusebio Saulder, Christoph Schlegel, David Schubnell, Michael Seo, Hee-Jong Silber, Joseph H https://orcid.org/0000-0002-3461-0320 Siudek, Małgorzata Sprayberry, David Tan, Ting Tang, Ji-Jia Tarlé, Gregory Walther, Michael Weaver, Benjamin A Yèche, Christophe Yu, Jiaxi Zhou, Rongpu https://orcid.org/0000-0001-5381-4372 Zou, Hu https://escholarship.org/uc/item/40f8n98p The Dark Energy Spectroscopic Instrument (DESI) is a massively parallel spectroscopic survey on the Mayall telescope at Kitt Peak, which has released measurements of baryon acoustic oscillations determined from over 14 million extragalactic targets. We combine DESI Data Release 2 with CMB datasets to search for evidence of matter conversion to dark energy (DE), focusing on a scenario mediated by stellar collapse to cosmologically coupled black holes (CCBHs). In this physical model, which has the same number of free parameters as ΛCDM, DE production is determined by the cosmic star formation rate density (SFRD), allowing for distinct early- and late-time cosmologies. Using two SFRDs to bracket current observations, we find that the CCBH model: accurately recovers the cosmological expansion history, agrees with early-time baryon abundance measured by BBN, reduces tension with the local distance ladder, and relaxes constraints on the summed neutrino mass ∑m_{ν}. For these SFRDs,... https://escholarship.org/uc/item/40f8n98p Wed, 4 Mar 2026 00:00:00 +0000 Ahlen, SP Aviles, A Cartwright, B Croker, KS Elbers, W Farrah, D Fernandez, N Niz, G Rohlf, JW Tarlé, G Windhorst, RA Aguilar, J Andrade, U Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A de Mattia, A Dey, B Doel, P Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Huterer, D Ishak, M Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Miquel, R Moustakas, J Pérez-Ràfols, I Prada, F Rossi, G Sanchez, E Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Walther, M Weaver, BA Wechsler, RH Zou, H https://escholarship.org/uc/item/3255929v We present updated constraints on the parameters of an axion dark energy model, for which we took into account the properties of its characteristic potential and its full cosmological evolution. We show that the values of the axion parameters appear sufficiently constrained by the data, including the latest DESI DR1, and are consistent with the theoretical expectations of a field mass ma in the ultralight regime log(mac2/eV)≃-32.60±0.12, and an effective energy scale fa close to the reduced Planck energy log(fa/MPl)≃-0.28±0.19. Our results also support the idea of dynamical dark energy, although Bayesian evidence still favors the phenomenological dark energy model w0wa over the axion dark energy, with the Bayes factor indicating moderate and weak strength of the evidence, respectively, when the models are compared to the cosmological constant Λ. However, the results suggest that axion dark energy remains a well-motivated model and its parameters may be better constrained if the... https://escholarship.org/uc/item/3255929v Wed, 4 Mar 2026 00:00:00 +0000 Ureña-López, LA Lozano-Rodríguez, F Román-Herrera, JO Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Dey, Arjun Ferraro, S Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Honscheid, K Howlett, C Ishak, M Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Lambert, A Landriau, M Le Guillou, L Manera, M Meisner, A Miquel, R Moustakas, J Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/2v5013dn Correlations of fluctuations of the flux in Lyman-α forests of high-redshift quasars have been observed by the Baryonic Acoustic Oscillation Spectroscopy Survey (BOSS) and the Dark Energy Spectroscopy Instrument (DESI) survey where they have revealed the effects of baryon acoustic oscillations (BAO). In order to fit the correlation functions to a physical model and thereby constrain cosmological parameters, it is necessary to take into account the effects of fitting the observed spectra to a template about which the fluctuations are measured. In this paper we use mock spectra to test the distortion matrix technique that has been used since the final BOSS data release to appropriately distort the models. We show that while percent-level effects on the derived forest bias parameters may be present, the technique works sufficiently well that the determination of the BAO peak position is not affected at the percent level. We introduce modifications in the technique used by DESI that... https://escholarship.org/uc/item/2v5013dn Wed, 4 Mar 2026 00:00:00 +0000 Busca, Nicolas Rich, James Bautista, Julian Cuceu, Andrei Font-Ribera, Andreu Guy, Julien https://orcid.org/0000-0001-9822-6793 Herrera-Alcantar, Hiram K Stermer, Julianna Balland, Christophe Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Doel, P Ferraro, S Forero-Romero, JE Gaztañaga, E Gordon, C Gutierrez, G Ishak, M Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M Le Guillou, L Magneville, C Martini, P Miquel, R Nadathur, S Palanque-Delabrouille, N Prada, F Pérez-Ràfols, I Ravoux, C Rossi, G Sanchez, E Schlegel, D Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhou, R Zou, H https://escholarship.org/uc/item/1n83m1h6 The Hobby–Eberly Dark Energy Experiment (HETDEX) is an untargeted spectroscopic galaxy survey that uses Lyα-emitting galaxies (LAEs) as tracers of 1.9 < z < 3.5 large-scale structure. Most detections consist of a single emission line, whose identity is inferred via a Bayesian analysis of ancillary data. To determine the accuracy of these line identifications, HETDEX detections were observed with the Dark Energy Spectroscopic Instrument (DESI). In two DESI pointings, high-confidence spectroscopic redshifts are obtained for 1157 sources, including 982 LAEs. The DESI spectra are used to evaluate the accuracy of the HETDEX object classifications and tune the methodology to achieve the HETDEX science requirement of ≲2% contamination of the LAE sample by low-redshift emission-line galaxies, while still assigning 96% of the true Lyα emission sample with the correct spectroscopic redshift. We compare emission-line measurements between the two experiments assuming a simple Gaussian... https://escholarship.org/uc/item/1n83m1h6 Wed, 4 Mar 2026 00:00:00 +0000 Landriau, Martin https://orcid.org/0000-0003-1838-8528 Cooper, Erin Mentuch Davis, Dustin Gebhardt, Karl Ciardullo, Robin Armengaud, Éric Dey, Arjun Raichoor, Anand https://orcid.org/0000-0001-5999-7923 Schlegel, David J https://orcid.org/0000-0002-5042-5088 Wilson, Michael Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Ferraro, S https://orcid.org/0000-0003-4992-7854 Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Hahn, C Honscheid, K Howlett, C Ishak, M Juneau, S Kehoe, R Kisner, T Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Le Guillou, L Levi, Michael E https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Miquel, R Moustakas, J Nadathur, S Pérez-Ràfols, I Poppett, C Prada, F Rossi, G Sanchez, E Schubnell, M Sprayberry, D Tarlé, G Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H Farrow, Daniel J Hill, Gary J Jeong, Donghui Liu, Chenxu Saito, Shun Schneider, Donald P https://escholarship.org/uc/item/1ch809d5 We present cosmological constraints on deviations from general relativity (GR) from the first-year of clustering observations from the Dark Energy Spectroscopic Instrument (DESI) in combination with other available datasets including the CMB data from Planck with CMB-lensing from Planck and ACT, BBN constraints on the physical baryon density, the galaxy weak lensing and clustering from DESY3 and supernova data from DESY5. We first consider the μ(a,k)–Σ(a,k) modified gravity (MG) parameterization (as well as η(a,k)) in a ΛCDM and a w 0 wa CDM cosmological backgrounds. Using a functional form for time-only evolution gives μ 0 = 0.11+0.44 -0.54 from DESI(FS+BAO)+BBN and a wide prior on ns . Using DESI(FS+BAO)+CMB+DESY3+DESY5-SN, we obtain μ 0 = 0.05 ± 0.22 and Σ0 = 0.008 ± 0.045 and similarly μ 0 = 0.02+0.19 -0.24 and η 0 = 0.09+0.36 -0.60, in an ΛCDM background. In w 0 wa CDM we obtain μ 0 = -0.24+0.32 -0.28 and Σ0 = 0.006 ± 0.043, consistent with GR, and we still find a preference... https://escholarship.org/uc/item/1ch809d5 Wed, 4 Mar 2026 00:00:00 +0000 Ishak, M Pan, J Calderon, R Lodha, K Valogiannis, G Aviles, A Niz, G Yi, L Zheng, C Garcia-Quintero, C de Mattia, A Medina-Varela, L Cervantes-Cota, JL Andrade, U Huterer, D Noriega, HE Zhao, G Shafieloo, A Fang, W Ahlen, S Bianchi, D Brooks, D Burtin, E Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cole, S de la Macorra, A Dey, A Fanning, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gil-Marín, H Gontcho, S Gontcho A Gutierrez, G Hahn, C Honscheid, K Howlett, C Juneau, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Leauthaud, A Levi, ME https://orcid.org/0000-0003-1887-1018 Meisner, A Miquel, R Moustakas, J Newman, JA Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Ross, AJ Rossi, G Sanchez, E Schlegel, D Schubnell, M Seo, H Sprayberry, D Tarlé, G Vargas-Magaña, M Weaver, BA Wechsler, RH Yèche, C Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/0z2063j6 The spectroscopic data from DESI Data Release 1 (DR1) galaxies enables the analysis of 3D clustering by fitting galaxy power spectra and reconstructed correlation functions in redshift space. Given low measurements of the amplitude of structure from cosmic shear at z ∼ 1, redshift space distortions (RSD) + Baryon Acoustic Oscillation (BAO) signals from DESI galaxies combined with weak lensing can break degeneracies and provide a tight alternative constraint on the z ∼ 1 amplitude of structure. In this paper we perform joint analyses that combine full-shape + post-reconstruction information from the DESI DR1 BGS and LRG samples along with angular cross-correlations with Planck PR4 and ACT DR6 CMB lensing maps. We show that adding galaxy-lensing cross-correlations tightens clustering amplitude constraints, improving σ 8 uncertainties by 30% over RSD+BAO alone. We also include angular galaxy-galaxy and galaxy-lensing spectra using photometric samples from the DESI Legacy Survey to... https://escholarship.org/uc/item/0z2063j6 Wed, 4 Mar 2026 00:00:00 +0000 Maus, M White, M https://orcid.org/0000-0001-9912-5070 Sailer, N Lizancos, A Baleato Ferraro, S https://orcid.org/0000-0003-4992-7854 Chen, S DeRose, J Aguilar, J Ahlen, S BenZvi, S Bianchi, D Brooks, D Burtin, E Castander, FJ Chaussidon, E Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A de Mattia, A Doel, P Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Honscheid, K Howlett, C Ishak, M Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Miquel, R Nadathur, S Newman, JA Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Ross, AJ Rossi, G Samushia, L Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zarrouk, P Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/092750c5 The peak of the matter power spectrum, known as the turnover (TO) scale, is determined by the horizon size at the time of matter-radiation equality. This scale can serve as a standard ruler, independent of other features in the matter power spectrum, such as baryon acoustic oscillations (BAO). Here, we present the first detection of the turnover in the galaxy autopower spectrum, utilizing the distribution of quasars and luminous red galaxies (LRG) measured by the Dark Energy Spectroscopic Instrument (DESI) during its first year of survey operations in a model-independent manner. To avoid confirmation bias, we first analyze the data using data blinding methods designed for the DESI baryon acoustic oscillation, redshift space distortion and scale-dependent bias signals. We measure the angle-averaged dilation distance DV(z=1.651)=(38.1±2.5)rH from the quasars and DV(z=0.733)=(21.8±1.0)rH from the LRG sample in units of the horizon rH at the matter-radiation-equality epoch. Combining... https://escholarship.org/uc/item/092750c5 Wed, 4 Mar 2026 00:00:00 +0000 Bahr-Kalus, B Parkinson, D Lodha, K Mueller, E Chaussidon, E de Mattia, A Forero-Sánchez, D Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A de la Macorra, A Doel, P Font-Ribera, A Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Honscheid, K Huterer, D Ishak, M Kehoe, R Kent, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Landriau, M Le Guillou, L Magneville, C Manera, M Martini, P Meisner, A Miquel, R Moustakas, J Nadathur, S Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Ross, AJ Rossi, G Samushia, L Sanchez, E Schlegel, D Schubnell, M Seo, H Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhou, R Zou, H https://escholarship.org/uc/item/03q290h9 Over several dedicated programs that include targets beyond the main cosmological samples, the Dark Energy Spectroscopic Instrument collected spectra for 304,970 unique objects in two fields centered on the COSMOS and XMM-LSS fields. In this work, we develop spectroscopic redshift robustness criteria for those spectra, validate these criteria using visual inspection, and provide two custom value-added catalogs with our redshift characterizations. With these criteria, we reliably classify 212,935 galaxies below z < 1.6, 9713 quasars, and 35,222 stars. The resulting catalogs achieve a redshift purity exceeding 99.4% across all galaxy samples. As a critical element in characterizing the selection function, we provide the description of 70 different algorithms that were used to select these targets from imaging data. To facilitate joint imaging/spectroscopic analyses, we provide row-matched photometry from the Dark Energy Camera, Hyper-Suprime Cam, and public COSMOS2020 photometric... https://escholarship.org/uc/item/03q290h9 Wed, 4 Mar 2026 00:00:00 +0000 Ratajczak, J Dawson, KS Weaverdyck, N https://orcid.org/0000-0001-9382-5199 Aguilar, J Ahlen, S Armengaud, E Bailey, S https://orcid.org/0000-0003-4162-6619 Bianchi, D Blanco, D Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Dey, Arjun Dey, Biprateep Doel, P Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hagen, T Herrera-Alcantar, HK Honscheid, K Huterer, D Ishak, M Jimenez, J Joyce, R Juneau, S Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Koposov, SE Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Lambert, A Lamman, C Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Leauthaud, A Lee, J Levi, ME https://orcid.org/0000-0003-1887-1018 Li, Q Longhurst, I Luo, Y https://orcid.org/0000-0001-7729-6629 Manera, M Martini, P McCullough, J Meisner, A Miquel, R Moustakas, J Nadathur, S Newman, JA Palanque-Delabrouille, N Percival, WJ Poppett, C Prada, F Pérez-Ràfols, I Raichoor, A https://orcid.org/0000-0001-5999-7923 Ravoux, C Rossi, G Hernandez, Y Salcedo Sanchez, E Saulder, C Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Seo, H Sprayberry, D Tarlé, G Weaver, BA Wechsler, RH White, M https://orcid.org/0000-0001-9912-5070 Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/8gg3z5b3 We present the measurements and cosmological implications of the galaxy two-point clustering using over 4.7 million unique galaxy and quasar redshifts in the range 0.1 < z < 2.1 divided into six redshift bins over a ∼ 7,500 square degree footprint, from the first year of observations with the Dark Energy Spectroscopic Instrument (DESI Data Release 1). By fitting the full power spectrum, we extend previous DESI DR1 baryon acoustic oscillation (BAO) measurements to include redshift-space distortions and signals from the matter-radiation equality scale. For the first time, this Full-Shape analysis is blinded at the catalogue-level to avoid confirmation bias and the systematic errors are accounted for at the two-point clustering level, which automatically propagates them into any cosmological parameter. When analysing the data in terms of compressed model-agnostic variables, we obtain a combined precision of 4.7% on the amplitude of the redshift space distortion (RSD) signal... https://escholarship.org/uc/item/8gg3z5b3 Tue, 3 Mar 2026 00:00:00 +0000 Adame, AG Aguilar, J Ahlen, S Alam, S Alexander, DM Alvarez, M Alves, O Anand, A https://orcid.org/0000-0003-2923-1585 Andrade, U Armengaud, E Avila, S Aviles, A Awan, H Bailey, S https://orcid.org/0000-0003-4162-6619 Baltay, C Bault, A Behera, J BenZvi, S Beutler, F Bianchi, D Blake, C Blum, R Brieden, S Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Buckley-Geer, E Burtin, E Calderon, R Canning, R Rosell, A Carnero Cereskaite, R Cervantes-Cota, JL Chabanier, S Chaussidon, E Chaves-Montero, J Chen, S Chen, X Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cole, S Cuceu, A https://orcid.org/0000-0002-2169-0595 Davis, TM Dawson, K de la Macorra, A de Mattia, A Deiosso, N Dey, A Dey, B Ding, Z Doel, P Edelstein, J Eftekharzadeh, S Eisenstein, DJ Elliott, A Fagrelius, P Fanning, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Ereza, J Findlay, N Flaugher, B Font-Ribera, A Forero-Sánchez, D Forero-Romero, JE Garcia-Quintero, C Garrison, LH Gaztañaga, E Gil-Marín, H Gontcho, S Gontcho A Gonzalez-Morales, AX Gonzalez-Perez, V Gordon, C Green, D Gruen, D Gsponer, R Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hadzhiyska, B Hahn, C Hanif, MMS Herrera-Alcantar, HK Honscheid, K Howlett, C Huterer, D Iršič, V Ishak, M Juneau, S Karaçaylı, NG Kehoe, R Kent, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kong, H Koposov, SE Kremin, A https://orcid.org/0000-0001-6356-7424 Krolewski, A Lai, Y Lan, T-W Landriau, M https://orcid.org/0000-0003-1838-8528 Lang, D Lasker, J Le Goff, JM Le Guillou, L https://escholarship.org/uc/item/5wc9q1rk We present cosmological results from the measurement of clustering of galaxy, quasar and Lyman-α forest tracers from the first year of observations with the Dark Energy Spectroscopic Instrument (DESI Data Release 1). We adopt the full-shape (FS) modeling of the power spectrum, including the effects of redshift-space distortions, in an analysis which has been thoroughly validated in a series of supporting papers as summarised in [1]. We combine the full-shape information with DESI's DR1 constraints from the baryon acoustic oscillations (BAO) of these tracers. In the flat ΛCDM cosmological model, DESI (FS+BAO), combined with a baryon density prior from Big Bang Nucleosynthesis and a weak prior on the scalar spectral index, determines matter density to Ωm = 0.2962 ± 0.0095, and the amplitude of mass fluctuations to σ 8 = 0.842 ± 0.034. The addition of the cosmic microwave background (CMB) data tightens these constraints to Ωm = 0.3056 ± 0.0049 and σ 8 = 0.8121 ± 0.0053, while further... https://escholarship.org/uc/item/5wc9q1rk Tue, 3 Mar 2026 00:00:00 +0000 Adame, AG Aguilar, J Ahlen, S Alam, S Alexander, DM Prieto, C Allende Alvarez, M Alves, O Anand, A https://orcid.org/0000-0003-2923-1585 Andrade, U Armengaud, E Avila, S Aviles, A Awan, H Bahr-Kalus, B Bailey, S https://orcid.org/0000-0003-4162-6619 Baltay, C Bault, A Behera, J BenZvi, S Beutler, F Bianchi, D Blake, C Blum, R Bonici, M Brieden, S Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Buckley-Geer, E Burtin, E Calderon, R Canning, R Rosell, A Carnero Cereskaite, R Cervantes-Cota, JL Chabanier, S Chaussidon, E Chaves-Montero, J Chebat, D Chen, S Chen, X Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cole, S Cuceu, A https://orcid.org/0000-0002-2169-0595 Davis, TM Dawson, K de la Macorra, A de Mattia, A Deiosso, N Dey, A Dey, B Ding, Z Doel, P Edelstein, J Eftekharzadeh, S Eisenstein, DJ Elbers, W Elliott, A Fagrelius, P Fanning, K Ferraro, S https://orcid.org/0000-0003-4992-7854 Ereza, J Findlay, N Flaugher, B Font-Ribera, A Forero-Sánchez, D Forero-Romero, JE Frenk, CS Garcia-Quintero, C Garrison, LH Gaztañaga, E Gil-Marín, H Gontcho, S Gontcho A Gonzalez-Morales, AX Gonzalez-Perez, V Gordon, C Green, D Gruen, D Gsponer, R Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hadzhiyska, B Hahn, C Hanif, MMS Herrera-Alcantar, HK Honscheid, K Howlett, C Huterer, D Iršič, V Ishak, M Joyce, R Juneau, S Karaçaylı, NG Kehoe, R Kent, S Kirkby, D https://orcid.org/0000-0002-8828-5463 Kong, H Koposov, SE Kremin, A https://orcid.org/0000-0001-6356-7424 Krolewski, A https://escholarship.org/uc/item/5js1s12m We present the largest catalog to date of triply ionized carbon (C iv) absorbers detected in quasar spectra from the Dark Energy Spectroscopic Instrument. Using an automated matched-kernel convolution method with adaptive signal-to-noise thresholds, we identify 101,487 C iv systems in the redshift range 1.4 < z < 4.5 from 300,637 quasar spectra. Completeness is estimated via Monte Carlo simulations, and the catalog is 50% complete at EWC IV ≥ 0.4 Å. The differential equivalent width frequency distribution declines exponentially and shows weak redshift evolution. The absorber incidence per unit comoving path increases by a factor of 2–5 from z ≈ 4.5 to z ≈ 1.4, with stronger redshift evolution for strong systems. Using column densities derived from the apparent optical depth method, we constrain the cosmic mass density of C iv, ΩC IV, which increases by a factor of ∼3.8 from (0.82 ± 0.05) × 10−8 at z ≈ 4.5 to (3.16 ± 0.2) × 10−8 at z ≈ 1.4. From ΩC IV, we estimate a lower... https://escholarship.org/uc/item/5js1s12m Tue, 3 Mar 2026 00:00:00 +0000 Anand, Abhijeet https://orcid.org/0000-0003-2923-1585 Aguilar, J Ahlen, S Bianchi, D Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Canning, R Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Herrera-Alcantar, HK Ishak, M Juneau, S Kehoe, R Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Miquel, R Moustakas, J Muñoz-Gutiérrez, A Napolitano, L Pérez-Ràfols, I Rossi, G Sanchez, E Schlegel, D https://orcid.org/0000-0002-5042-5088 Schubnell, M Sprayberry, D Tarlé, G Temple, MJ Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372 https://escholarship.org/uc/item/4769b7kc The Dark Energy Spectroscopic Instrument (DESI) survey uses an automatic spectral classification pipeline to classify spectra. QuasarNET is a convolutional neural network used as part of this pipeline originally trained using data from the Baryon Oscillation Spectroscopic Survey (BOSS). In this paper we implement an active learning algorithm to optimally select spectra to use for training a new version of the QuasarNET weights file using only DESI data, with the goal of improving classification accuracy. This active learning algorithm includes a novel outlier rejection step using a Self-Organizing Map to ensure we label spectra representative of the larger quasar sample observed in DESI. We perform two iterations of the active learning pipeline, assembling a final dataset of 5600 labeled spectra, a small subset of the approximately 1.3 million quasar targets in DESI's Data Release 1. When splitting the spectra into training and validation subsets we achieve similar performance... https://escholarship.org/uc/item/4769b7kc Tue, 3 Mar 2026 00:00:00 +0000 Green, Dylan Kirkby, David https://orcid.org/0000-0002-8828-5463 Aguilar, J Ahlen, S Alexander, DM Armengaud, E Bailey, S https://orcid.org/0000-0003-4162-6619 Bault, A Bianchi, D Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de Belsunce, R de la Macorra, A Doel, P Fawcett, VA Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Ishak, M Juneau, S Kehoe, R Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lambert, A Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Miquel, R Moustakas, J Myers, AD Palanque-Delabrouille, N Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Saulder, C Schlegel, D Schubnell, M Seo, H Sinigaglia, F Sprayberry, D Tan, T Tarlé, G Weaver, BA Youles, S Yu, J Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/3655d6bp The one-dimensional power spectrum P 1D of Lyα forest offers rich insights into cosmological and astrophysical parameters, including constraints on the sum of neutrino masses, warm dark matter models, and the thermal state of the intergalactic medium. We present the measurement of P 1D using the optimal quadratic maximum likelihood estimator applied to over 300,000 Lyα quasars from Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI) survey. This sample represents the largest to date for P 1D measurements and is larger than the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) by a factor of 1.7. We conduct a meticulous investigation of instrumental and analysis systematics and quantify their impact on P 1D. This includes the development of a cross-exposure estimator that eliminates the need to model the pipeline noise and has strong potential for future P 1D measurements. We also present new insights into metal contamination through the 1D correlation... https://escholarship.org/uc/item/3655d6bp Tue, 3 Mar 2026 00:00:00 +0000 Karaçaylı, Naim Göksel Martini, Paul Aguilar, J Ahlen, S Armengaud, E Bailey, S https://orcid.org/0000-0003-4162-6619 Bault, A Bianchi, D Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Chaves-Montero, J Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Dey, A Dey, B Doel, P Ferraro, S https://orcid.org/0000-0003-4992-7854 Font-Ribera, A Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Hahn, C Herrera-Alcantar, HK Honscheid, K Ishak, M Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kremin, A https://orcid.org/0000-0001-6356-7424 Landriau, M https://orcid.org/0000-0003-1838-8528 Le Goff, JM Le Guillou, L Levi, ME https://orcid.org/0000-0003-1887-1018 Manera, M Meisner, A Miquel, R Montero-Camacho, P Nadathur, S Niz, G Palanque-Delabrouille, N Pan, Z Percival, WJ Pieri, Matthew M Prada, F Pérez-Ràfols, I Ravoux, C Rossi, G Sanchez, E Saulder, C Schlegel, D Schubnell, M Seo, H Siudek, M Sprayberry, D Tan, T Tang, Ji-Jia Tarlé, G Walther, M Weaver, BA Yu, J Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/5157h51h ABSTRACT The Dark Energy Spectroscopic Instrument (DESI) peculiar velocity survey aims to measure the peculiar velocities of early- and late-type galaxies within the DESI footprint using both the Fundamental Plane and optical Tully–Fisher relations. Direct measurements of peculiar velocities can significantly improve constraints on the growth rate of structure, reducing uncertainty by a factor of approximately 2.5 at redshift 0.1 compared to the DESI Bright Galaxy Survey’s redshift space distortion measurements alone. We assess the quality of stellar velocity dispersion measurements from DESI spectroscopic data. These measurements, along with photometric data from the Legacy Survey, establish the Fundamental Plane relation and determine distances and peculiar velocities of early-type galaxies. During survey validation, we obtain spectra for 6698 unique early-type galaxies, up to a photometric redshift of 0.15. 64 per cent of observed galaxies (4267) have relative velocity... https://escholarship.org/uc/item/5157h51h Tue, 24 Feb 2026 00:00:00 +0000 Said, Khaled Howlett, Cullan Davis, Tamara Lucey, John Saulder, Christoph Douglass, Kelly Kim, Alex G https://orcid.org/0000-0001-6315-8743 Kremin, Anthony https://orcid.org/0000-0001-6356-7424 Ross, Caitlin Aldering, Greg Aguilar, Jessica Nicole Ahlen, Steven BenZvi, Segev Bianchi, Davide Brooks, David Claybaugh, Todd https://orcid.org/0000-0002-5024-6987 Dawson, Kyle de la Macorra, Axel Dey, Biprateep Doel, Peter Fanning, Kevin Ferraro, Simone Font-Ribera, Andreu Forero-Romero, Jaime E Gaztañaga, Enrique Gontcho, Satya Gontcho A Guy, Julien https://orcid.org/0000-0001-9822-6793 Honscheid, Klaus Kehoe, Robert Kisner, Theodore Lambert, Andrew Landriau, Martin Le Guillou, Laurent Manera, Marc Meisner, Aaron Miquel, Ramon Moustakas, John Muñoz-Gutiérrez, Andrea Myers, Adam Nie, Jundan Palanque-Delabrouille, Nathalie Percival, Will Prada, Francisco Rossi, Graziano Sanchez, Eusebio Schlegel, David Schubnell, Michael Silber, Joseph Harry https://orcid.org/0000-0002-3461-0320 Sprayberry, David Tarlé, Gregory Magana, Mariana Vargas Weaver, Benjamin Alan Wechsler, Risa Zhou, Zhimin Zou, Hu https://escholarship.org/uc/item/6wr8s2rz We present a new method to search for strong gravitational-lensing systems by pairing spectra that are close together on the sky in a spectroscopic survey. We visually inspect 26,621 spectra in the Dark Energy Spectroscopic Instrument (DESI) Data Release 1 that are selected in this way. We further inspect the 11,848 images corresponding to these spectra in the DESI Legacy Imaging Surveys Data Release 10, and obtain 2046 conventional strong gravitational lens candidates, of which 1906 are new. This constitutes the largest sample of lens candidates identified to date in spectroscopic data. Besides the conventional candidates, we identify a new class of systems that we term “dimple lenses.” These systems have a low-mass foreground galaxy as a lens, typically smaller in angular extent and fainter compared with the lensed background source galaxy, producing subtle surface brightness indentations in the latter. We report the discovery of 318 of these “dimple lens” candidates. We suspect... https://escholarship.org/uc/item/6wr8s2rz Wed, 11 Feb 2026 00:00:00 +0000 Hsu, Yuan-Ming Huang, Xiaosheng Storfer, Christopher J Inchausti, Jose Carlos Schlegel, David https://orcid.org/0000-0002-5042-5088 Moustakas, John Aguilar, J Ahlen, S Anand, A https://orcid.org/0000-0003-2923-1585 Bailey, S https://orcid.org/0000-0003-4162-6619 Bianchi, D Brooks, D Castander, FJ Claybaugh, T https://orcid.org/0000-0002-5024-6987 Cuceu, A https://orcid.org/0000-0002-2169-0595 de la Macorra, A Della Costa, J Dey, Arjun Dey, Biprateep Doel, P Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Huterer, D Joyce, R Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Manera, M Meisner, A Miquel, R Nadathur, S Palanque-Delabrouille, N Percival, WJ Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372 Zou, H https://escholarship.org/uc/item/88s2w2v3 The LEGEND Collaboration is searching for neutrinoless double-beta ( ) decay by operating high-purity germanium detectors enriched in in a low-background liquid argon environment. Building on key technological innovations from the GERmanium Detector Array (GERDA) experiment and the MAJORANA DEMONSTRATOR experiment, LEGEND-200 has performed a first decay search based on 61.0 kg yr of data. Over half of this exposure comes from our highest performing detectors, including newly developed inverted-coaxial detectors, and is characterized by an estimated background level of in the decay signal region. A combined analysis of data from GERDA, the MAJORANA DEMONSTRATOR, and LEGEND-200, characterized by a 90% confidence level exclusion sensitivity of on the half-life of decay, reveals no evidence for a signal and sets a new observed lower limit at (90% confidence level). Assuming the decay is mediated by Majorana neutrinos, this corresponds to an upper limit on the effective... https://escholarship.org/uc/item/88s2w2v3 Tue, 10 Feb 2026 00:00:00 +0000 Acharya, H Ackermann, N Agostini, M Alexander, A Andreoiu, C Araujo, GR Avignone, FT Babicz, M Bae, W Bakalyarov, AM Balata, M Barabash, AS Barbeau, PS Barton, CJ Baudis, L Bauer, C Bernieri, E Bezrukov, L Bhimani, KH Biancacci, V Blalock, E Borden, SJ Borghi, G Borra, F Bos, B Boston, A Bothe, V Bouabid, R Brugnera, R Burlac, N Busch, M Calgaro, S Canonica, L Capra, S Carminati, M Carney, RMD Cattadori, C Cesarano, R Chan, Y-D Chapman, JR Chernogorov, A Chiu, P-J Christofferson, CD Clark, ML Colon-Rivera, AI Comellato, T D’Andrea, V Deckert, R Detwiler, JA Di Giacinto, A Di Marco, N Dixon, T Dong, K-M Drobizhev, A Duran, G Efremenko, Yu Elliott, SR Emmanuel, CHJ Engelhardt, E Esch, E Febbraro, MT Ferella, F Fields, DE Fiorini, C Fomina, M Fuad, N Gala, R Galindo-Uribarri, A Gangapshev, A Garfagnini, A Gazzana, S Geraci, A Gessler, L Ghiano, C Gieb, A Giri, S Gold, M Gooch, C Grünauer, G Green, MP Gruszko, J Guinn, I Guiseppe, VE Gurentsov, V Gurov, Y Gusev, K Hackett, B Hagemann, F Haranczyk, M Henkes, F Henning, R Herrera, J Aguilar, D Hervas Hinton, J Hodák, R Hoffmann, HFR Howe, MA Huber, M Hult, M Ianni, A https://escholarship.org/uc/item/6v96v16q Understanding dense matter hydrodynamics is critical for predicting plasma behavior in environments relevant to laser-driven inertial confinement fusion. Traditional diagnostic sources face limitations in brightness, spatiotemporal resolution, and in their ability to detect relevant electromagnetic fields. In this work, we present a dual-probe, multi-messenger laser wakefield accelerator platform combining ultrafast X-rays and relativistic electron beams at 1 Hz, to interrogate a free-flowing water target in vacuum, heated by an intense 200 ps laser pulse. This scheme enables high-repetition-rate tracking the evolution of the interaction using both particle types. Betatron X-rays reveal a cylindrically symmetric shock compression morphology assisted by low-density vapor, resembling foam-layer-assisted fusion targets. The synchronized electron beam detects time-evolving electromagnetic fields, uncovering charge separation and ion species differentiation during plasma expansion... https://escholarship.org/uc/item/6v96v16q Tue, 10 Feb 2026 00:00:00 +0000 Balcazar, Mario D Tsai, Hai-En https://orcid.org/0000-0002-8667-5468 Ostermayr, Tobias M Campbell, Paul Trantham, Matthew R Albert, Félicie Chen, Qiang Colgan, Cary Dyer, Gilliss M Eisentraut, Zachary Esarey, Eric Grace, Elizabeth S Greenwood, Benjamin Gonsalves, Anthony J https://orcid.org/0000-0002-2567-7582 Hakimi, Sahel Jacob, Robert https://orcid.org/0000-0001-6484-9917 Kettle, Brendan King, Paul Krushelnick, Karl Lemos, Nuno Los, Eva E Ma, Yong Mangles, Stuart PD Nees, John Pagano, Isabella M Schroeder, Carl B https://orcid.org/0000-0002-9610-0166 Simpson, Raspberry A Vazquez, Anthony V van Tilborg, Jeroen Geddes, Cameron GR Thomas, Alexander GR Kuranz, Carolyn C https://escholarship.org/uc/item/5kd1h199 This study presents an analysis of seasonal variations in the atmospheric muon neutrino flux, using 11.3 years of data from the IceCube Neutrino Observatory. By leveraging a novel spectral unfolding method, we explore the energy range from 125 GeV to 10 TeV for zenith angles from 90∘ to 110∘, corresponding to the Antarctic atmosphere. Our findings reveal that the differential measurement of the amplitudes of the seasonal variation is consistent with an energy-dependent decrease reaching (-4.5 ± 1.2)% during Austral winter and increase to (+ 3.9 ± 1.3)% during Austral summer relative to the annual average at 10 TeV. While the unfolded flux exceeds the model predictions by up to 30%, the differential measurement of the seasonal to annual average flux remains unaffected. The measured seasonal variations of the muon neutrino spectrum are consistent with theoretical predictions using the MCEq code and the NRLMSISE-00 atmospheric model. https://escholarship.org/uc/item/5kd1h199 Tue, 10 Feb 2026 00:00:00 +0000 Zimmerman, M Zilberman, P Zhelnin, P https://orcid.org/0000-0003-1019-8375 Zhang, Z Zhang, S https://orcid.org/0000-0002-2967-790X Zegarelli, A https://orcid.org/0000-0003-1497-3826 Yuan, T https://orcid.org/0000-0002-7041-5872 Yu, S https://orcid.org/0000-0003-0035-7766 Yu, F https://orcid.org/0000-0002-5775-2452 Young, R Yoshida, S https://orcid.org/0000-0003-2480-5105 Yildizci, E Yanez, JP Xu, XW Wrede, G Wolf, M https://orcid.org/0000-0001-9991-3923 Witthaus, L https://orcid.org/0009-0000-0666-3671 Williams, DR Wiebusch, CH https://orcid.org/0000-0002-6418-3008 Whitehorn, N https://orcid.org/0000-0002-3157-0407 Weyrauch, M Werthebach, J Wendt, C https://orcid.org/0000-0001-8076-8877 Wen, AY https://orcid.org/0009-0009-4869-7867 Weldert, J Weindl, A Weigel, P Weaver, C https://orcid.org/0000-0003-2385-2559 Wang, A https://orcid.org/0009-0006-9420-2667 Walck, C Vijai, A Veske, D Verpoest, S https://orcid.org/0000-0002-3031-3206 Vergara Carrasco, S Vereecken, M Venugopal, M Veitch-Michaelis, J Varsi, F Vara, J van Santen, J https://orcid.org/0000-0002-2412-9728 Vannerom, D van Eijndhoven, N https://orcid.org/0000-0001-5558-3328 Vandenbroucke, J https://orcid.org/0000-0002-9867-6548 Valtonen-Mattila, N https://orcid.org/0000-0002-1830-098X Vaidyanathan, A Upshaw, K Upadhyay, AK https://orcid.org/0000-0003-1957-2626 Unland Elorrieta, MA https://orcid.org/0000-0002-6124-3255 Trettin, A Tosi, D Toscano, S https://orcid.org/0000-0002-1860-2240 Tönnis, C Tollefson, K https://orcid.org/0000-0001-9725-1479 Tilav, S Thwaites, J https://orcid.org/0000-0001-9179-3760 Thompson, WG https://orcid.org/0000-0003-2988-7998 Thiesmeyer, M https://orcid.org/0009-0003-0005-4762 Thakuri, A Terliuk, A Ter-Antonyan, S https://orcid.org/0000-0002-5788-1369 Taboada, I https://orcid.org/0000-0003-3509-3457 Sullivan, GW https://orcid.org/0000-0002-2585-2352 Stuttard, T https://orcid.org/0000-0001-7944-279X Stürwald, T Stezelberger, T https://orcid.org/0000-0003-2676-9574 Stanev, T Stamatikos, M Stachurska, J https://orcid.org/0000-0002-0238-5608 Spiering, C https://orcid.org/0000-0001-7372-0074 Spiczak, GM https://orcid.org/0000-0002-0030-0519 Spannfellner, C Sommani, G https://orcid.org/0000-0002-0094-826X Soldin, P https://orcid.org/0000-0003-1761-2495 Soldin, D https://orcid.org/0000-0003-3005-7879 Søgaard, A Soedingrekso, J Snihur, R Smithers, B https://orcid.org/0000-0003-1273-985X Skrzypek, B https://orcid.org/0000-0002-0910-1057 Silva, M https://orcid.org/0000-0001-6940-8184 Shimizu, N https://orcid.org/0000-0001-6857-1772 Shefali, S Shah, R https://orcid.org/0000-0003-2829-1260 Sevle Myhr, PA https://orcid.org/0009-0005-9103-4410 Seunarine, S https://orcid.org/0000-0003-3272-6896 Seo, M Seikh, M https://orcid.org/0000-0002-4464-7354 Seen, L https://orcid.org/0009-0004-9204-0241 Seckel, D Sclafani, S https://orcid.org/0000-0001-9446-1219 Schwirn, S Schumacher, L https://orcid.org/0000-0001-8945-6722 Schröder, FG https://orcid.org/0000-0001-8495-7210 Schneider, J https://orcid.org/0000-0001-7752-5700 Schmidt, T Schmeisser, N Schlüter, F https://orcid.org/0000-0002-5545-4363 Schlüter, B Schlickmann, L https://orcid.org/0000-0002-9746-6872 Schindler, S https://orcid.org/0000-0001-5507-8890 https://escholarship.org/uc/item/9ct545pv Electrode–electrolyte interfaces are of critical importance in several fields, including renewable energy, corrosion, and environmental chemistry. However, investigating these interfaces under operational conditions poses considerable challenges due to the limitations of the instrumentation employed. While recent advancements in in situ and operando techniques have enhanced our comprehension of the steady-state properties of solid-liquid interfaces, the dynamic behaviors of these systems remain inadequately explored. This study introduces a time-resolved X-ray photoelectron spectroscopy (XPS) technique designed to capture transient reaction intermediates and charging dynamics at electrified interfaces. The presented proof-of-principle study demonstrates that electrochemical processes, represented by an equivalent electrical circuit (EEC) model, can be probed and understood using square wave voltage pulses of a potentiostat synchronized to the modified data acquisition of an XPS... https://escholarship.org/uc/item/9ct545pv Wed, 4 Feb 2026 00:00:00 +0000 Mahl, Johannes https://orcid.org/0000-0003-0989-8665 Gokturk, Pinar Aydogan Hamlyn, Rebecca English, Damon Suzer, Sefik Qian, Jin Crumlin, Ethan J https://escholarship.org/uc/item/4vq7313q IceCube has observed a diffuse astrophysical neutrino flux over the energy region from a few TeV to a few PeV. At PeV energies, the spectral shape is not yet well measured due to the low statistics of the data. This analysis probes the gap between 1 and 10 PeV by using high-energy downgoing muon neutrinos. To reject the large atmospheric muon background, two complementary techniques are combined. The first technique selects events with high stochasticity to reject atmospheric muon bundles whose stochastic energy losses are smoothed due to high muon multiplicity. The second technique vetoes atmospheric muons with the IceTop surface array. Using 9 yrs of data, we found two neutrino candidate events in the signal region, consistent with expectation from background, each with relatively high signal probabilities. A joint maximum likelihood estimation is performed using this sample and an independent 9.5-yr sample of tracks to measure the neutrino spectrum. A likelihood ratio test... https://escholarship.org/uc/item/4vq7313q Wed, 4 Feb 2026 00:00:00 +0000 Abbasi, R Ackermann, M Adams, J Agarwalla, SK Aguilar, JA Ahlers, M Alameddine, JM Amin, NM Andeen, K Argüelles, C Ashida, Y Athanasiadou, S Axani, SN Babu, R Bai, X V., A Balagopal Baricevic, M Barwick, SW https://orcid.org/0000-0003-2050-6714 Bash, S Basu, V Bay, R Beatty, JJ Tjus, J Becker Beise, J Bellenghi, C BenZvi, S Berley, D Bernardini, E Besson, DZ Blaufuss, E Bloom, L Blot, S Bontempo, F Motzkin, JY Book Meneguolo, C Boscolo Böser, S Botner, O Böttcher, J Braun, J Brinson, B Brisson-Tsavoussis, Z Brostean-Kaiser, J Brusa, L Burley, RT Butterfield, D Campana, MA Caracas, I Carloni, K Carpio, J Chattopadhyay, S Chau, N Chen, Z Chirkin, D Choi, S Clark, BA Coleman, A Coleman, P Collin, GH Connolly, A Conrad, JM Corley, R Cowen, DF De Clercq, C DeLaunay, JJ Delgado, D Deng, S Desai, A Desiati, P de Vries, KD de Wasseige, G DeYoung, T Díaz-Vélez, JC Dierichs, P DiKerby, S Dittmer, M Domi, A Draper, L Dujmovic, H Durnford, D Dutta, K DuVernois, MA Ehrhardt, T Eidenschink, L Eimer, A Eller, P Ellinger, E Mentawi, S El Elsässer, D Engel, R Erpenbeck, H Esmail, W Evans, J Evenson, PA Fan, KL Fang, K Farrag, K Fazely, AR Fedynitch, A Feigl, N Fiedlschuster, S https://escholarship.org/uc/item/5hn839qm For the construction of the ATLAS Inner Tracker strip detector, silicon strip sensor modules are glued directly onto carbon fibre support structures using a soft silicone gel. During tests at temperatures below -35°C, several of the sensors were found to crack due to a mismatch in coefficients of thermal expansion between polyimide circuit boards with copper metal layers (glued onto the sensor) and the silicon sensor itself. While module assembly procedures were developed to minimise variations between modules, cold tests showed a wide range of temperatures at which supposedly comparable modules failed. The observed variance (fracture temperatures between -35°C and -70°C) for supposedly comparable modules suggests an undetected variation between modules suspected to be intrinsic to the silicon wafer itself. Therefore, a test programme was developed to investigate the fracture stress of representative sensor wafer cutoffs. This paper presents results for the fracture stress of... https://escholarship.org/uc/item/5hn839qm Wed, 28 Jan 2026 00:00:00 +0000 Abidi, Haider Fadeyev, Vitaliy https://orcid.org/0000-0003-0154-4328 Jones, Tim Kumar, Akhil Lee, Tom Poley, Luise Sawyer, Craig Vallone, Giorgio https://orcid.org/0000-0003-0716-8116 Wonsak, Sven https://escholarship.org/uc/item/6fp2b1hh ABSTRACT The tens of millions of spectra being captured by the Dark Energy Spectroscopic Instrument (DESI) provide tremendous discovery potential. In this work we show how Machine Learning, in particular Variational Autoencoders (VAE), can detect anomalies in a sample of approximately 200 000 DESI spectra comprising galaxies, quasars and stars. We demonstrate that the VAE can compress the dimensionality of a spectrum by a factor of 100, while still retaining enough information to accurately reconstruct spectral features. We detect anomalous spectra as those with high reconstruction error and those which are isolated in the VAE latent representation. The anomalies identified fall into two categories: spectra with artefacts and spectra with unique physical features. Awareness of the former could improve the DESI spectroscopic pipeline; whilst the latter could help us discover new and unusual objects. To further curate the list of outliers identified, we use the Astronomaly package... https://escholarship.org/uc/item/6fp2b1hh Tue, 27 Jan 2026 00:00:00 +0000 Nicolaou, C Nathan, RP Lahav, O Palmese, A Saintonge, A Aguilar, J Ahlen, S Prieto, C Allende Bailey, S https://orcid.org/0000-0003-4162-6619 BenZvi, S Bianchi, D Brodzeller, A https://orcid.org/0000-0002-8934-0954 Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Della Costa, J Dey, Arjun Doel, P Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Honscheid, K Howlett, C Ishak, M Kehoe, R Kirkby, D https://orcid.org/0000-0002-8828-5463 Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lambert, A Landriau, M Le Guillou, L Meisner, A Miquel, R Moustakas, J Nadathur, S Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schubnell, M Siudek, M Sprayberry, D Tarlé, G Weaver, BA Zou, H https://escholarship.org/uc/item/5616n854 We investigate the spatial distribution, kinematics, and metallicity of stars in the Draco dwarf spheroidal galaxy using data from the Dark Energy Spectroscopic Instrument (DESI). We identify 155 high-probability members of Draco using line-of-sight velocity and metallicity information derived from DESI spectroscopy along with Gaia Data Release 3 proper motions. We find a mean line-of-sight velocity of −290.62 ± 0.80 km s−1 with dispersion = 9.57−0.62+0.66 km s−1 and mean metallicity [Fe/H] = −2.10 ± 0.04, consistent with previous results. We also find that Draco has a steep metallicity gradient within the half-light radius, and a metallicity gradient that flattens beyond the half-light radius. We identify eight high-probability members outside the King tidal radius, four of which we identify for the first time. These extratidal stars are not preferentially aligned along the orbit of Draco. We compute an average surface brightness of 34.02 mag arcsec−2 within an elliptical annulus... https://escholarship.org/uc/item/5616n854 Wed, 17 Dec 2025 00:00:00 +0000 Ding, J Rockosi, C Li, Ting S Koposov, SE Riley, AH Wang, W Cooper, AP Kizhuprakkat, N Lambert, M https://orcid.org/0000-0002-2527-8899 Medina, GE Sandford, N Aguilar, J Ahlen, S Bianchi, D Brooks, D Claybaugh, T https://orcid.org/0000-0002-5024-6987 de la Macorra, A Doel, P Forero-Romero, JE Gaztañaga, E Gontcho, S Gontcho A Gutierrez, G Guy, J https://orcid.org/0000-0001-9822-6793 Ishak, M Kehoe, R Kisner, T Kremin, A https://orcid.org/0000-0001-6356-7424 Lahav, O Landriau, M https://orcid.org/0000-0003-1838-8528 Le Guillou, L Meisner, A Miquel, R Moustakas, J Prada, F Pérez-Ràfols, I Rossi, G Sanchez, E Schubnell, M Silber, J https://orcid.org/0000-0002-3461-0320 Sprayberry, D Tarlé, G Weaver, BA Zhou, R https://orcid.org/0000-0001-5381-4372