http://www.rssboard.org/rss-specification 720 https://escholarship.org/uc/ucolick_oapolicydeposits/rss Recent eScholarship items from Open Access Policy Deposits Mon, 29 Jun 2026 11:15:57 +0000 https://escholarship.org/uc/item/44b7j2bq We carried out spectroscopic monitoring of 21 low-redshift Seyfert 1 galaxies using the Kast double spectrograph on the 3 m Shane telescope at Lick Observatory from 2016 April to 2017 May. Targeting active galactic nuclei (AGNs) with luminosities of λ L λ (5100 Å) ≈ 1044 erg s−1 and predicted Hβ lags of ∼20–30 days or black hole masses of 107–108.5 M ⊙, our campaign probes luminosity-dependent trends in broad-line region (BLR) structure and dynamics as well as to improve calibrations for single-epoch estimates of quasar black hole masses. Here we present the first results from the campaign, including Hβ emission-line light curves, integrated Hβ lag times (8–30 days) measured against V-band continuum light curves, velocity-resolved reverberation lags, line widths of the broad Hβ components, and virial black hole mass estimates (107.1–108.1 M ⊙). Our results add significantly to the number of existing velocity-resolved lag measurements and reveal a diversity of BLR gas kinematics... https://escholarship.org/uc/item/44b7j2bq Wed, 18 Mar 2026 00:00:00 +0000 Vivian, U Barth, Aaron J https://orcid.org/0000-0002-3026-0562 Vogler, H Alexander Guo, Hengxiao Treu, Tommaso https://orcid.org/0000-0002-8460-0390 Bennert, Vardha N Canalizo, Gabriela https://orcid.org/0000-0003-4693-6157 Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Gates, Elinor https://orcid.org/0000-0002-3739-0423 Hamann, Frederick Joner, Michael D Malkan, Matthew A https://orcid.org/0000-0001-6919-1237 Pancoast, Anna Williams, Peter R Woo, Jong-Hak Abolfathi, Bela Abramson, LE Armen, Stephen F Bae, Hyun-Jin Bohn, Thomas Boizelle, Benjamin D Bostroem, Azalee Brandel, Andrew Brink, Thomas G Channa, Sanyum Cooper, MC https://orcid.org/0000-0003-1371-6019 Cosens, Maren Donohue, Edward Fillingham, Sean P González-Buitrago, Diego Halevi, Goni Halle, Andrew Hood, Carol E Horne, Keith Horst, J Chuck de Kouchkovsky, Maxime Kuhn, Benjamin Kumar, Sahana Leonard, Douglas C Loveland, Donald Manzano-King, Christina McHardy, Ian Michel, Raúl Olaes, Melanie Kae B Park, Daeseong Park, Songyoun Pei, Liuyi Ross, Timothy W Runco, Jordan N Samuel, Jenna Sánchez, Javier Scott, Bryan Sexton, Remington O Shin, Jaejin Shivvers, Isaac Spencer, Chance L Stahl, Benjamin E Stegman, Samantha Stomberg, Isak Valenti, Stefano https://orcid.org/0000-0001-8818-0795 Villafaña, L Walsh, Jonelle L Yuk, Heechan Zheng, WeiKang https://escholarship.org/uc/item/1pm0r30z We present a homogeneous spectroscopic dataset of 22,339 stars in 78 Milky Way dwarf galaxy satellites and globular clusters. All data were taken with the Keck II telescope and Deep Extragalactic Imaging Multiobject Spectrograph (DEIMOS) using the 1200G grating (spectral resolution R ≃ 6000). Based on a uniform data reduction of 411 DEIMOS masks, we present a catalog of individual stellar radial velocities, equivalent-width-based [Fe/H] metallicities, and membership estimates. The Milky Way satellites range from MV = 2 to −14 (M⋆ = 101.5–107.5 M⊙); the majority of individual stars presented in these systems have magnitudes between 17 > r > 22. We additionally present redshifts for 2097 compact background galaxies and QSOs in the same magnitude range. The data were reduced to 1D spectra using PypeIt, which provides near Poisson-statistics-level sky subtraction. Radial velocities were determined via dmost, a forward modeling method first presented here, which combines both... https://escholarship.org/uc/item/1pm0r30z Thu, 12 Mar 2026 00:00:00 +0000 Geha, Marla Pelliccia, Debora https://orcid.org/0000-0002-3007-0013 Prochaska, J Xavier Cerny, William Davies, Frederick B Hennawi, Joseph Holden, Brad https://orcid.org/0000-0002-6153-3076 Reichwein, Dusty Westfall, Kyle B https://orcid.org/0000-0003-1809-6920 https://escholarship.org/uc/item/5st188ws We have modeled the velocity-resolved reverberation response of the Hβ broad emission line in nine Seyfert 1 galaxies from the Lick Active Galactic Nucleus (AGN) Monitoring Project 2016 sample, drawing inferences on the geometry and structure of the low-ionization broad-line region (BLR) and the mass of the central supermassive black hole. Overall, we find that the Hβ BLR is generally a thick disk viewed at low to moderate inclination angles. We combine our sample with prior studies and investigate line-profile shape dependence, such as log10(FWHM/σ) , on BLR structure and kinematics and search for any BLR luminosity-dependent trends. We find marginal evidence for an anticorrelation between the profile shape of the broad Hβ emission line and the Eddington ratio, when using the rms spectrum. However, we do not find any luminosity-dependent trends, and conclude that AGNs have diverse BLR structure and kinematics, consistent with the hypothesis of transient AGN/BLR conditions rather... https://escholarship.org/uc/item/5st188ws Wed, 11 Mar 2026 00:00:00 +0000 Villafaña, Lizvette Williams, Peter R Treu, Tommaso https://orcid.org/0000-0002-8460-0390 Brewer, Brendon J Barth, Aaron J https://orcid.org/0000-0002-3026-0562 Vivian, U Bennert, Vardha N Vogler, H Alexander Guo, Hengxiao Bentz, Misty C Canalizo, Gabriela https://orcid.org/0000-0003-4693-6157 Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Gates, Elinor https://orcid.org/0000-0002-3739-0423 Hamann, Frederick Joner, Michael D Malkan, Matthew A https://orcid.org/0000-0001-6919-1237 Woo, Jong-Hak Abolfathi, Bela Abramson, LE Armen, Stephen F Bae, Hyun-Jin Bohn, Thomas Boizelle, Benjamin D Bostroem, K Azalee Brandel, Andrew Brink, Thomas G Channa, Sanyum Cooper, MC https://orcid.org/0000-0003-1371-6019 Cosens, Maren Donohue, Edward Fillingham, Sean P González-Buitrago, Diego Halevi, Goni Halle, Andrew Hood, Carol E Horne, Keith Horst, J Chuck de Kouchkovsky, Maxime Kuhn, Benjamin Kumar, Sahana Leonard, Douglas C Loveland, Donald Manzano-King, Christina McHardy, Ian Michel, Raúl Olaes, Melanie Kae B Park, Daeseong Park, Songyoun Pei, Liuyi Ross, Timothy W Runco, Jordan N Sánchez, Javier Scott, Bryan Sexton, Remington O Shin, Jaejin Shivvers, Isaac Spencer, Chance L Stahl, Benjamin E Stegman, Samantha Stomberg, Isak Valenti, Stefano https://orcid.org/0000-0001-8818-0795 Walsh, Jonelle L Yuk, Heechan Zheng, WeiKang https://escholarship.org/uc/item/3rt576z3 We have modeled the velocity-resolved reverberation response of the H\b{eta} broad emission line in nine Seyfert 1 galaxies from the Lick Active Galactic Nucleus (AGN) Monitioring Project 2016 sample, drawing inferences on the geometry and structure of the low-ionization broad-line region (BLR) and the mass of the central supermassive black hole. Overall, we find that the H\b{eta} BLR is generally a thick disk viewed at low to moderate inclination angles. We combine our sample with prior studies and investigate line-profile shape dependence, such as log10(FWHM/{\sigma}), on BLR structure and kinematics and search for any BLR luminosity-dependent trends. We find marginal evidence for an anticorrelation between the profile shape of the broad H\b{eta} emission line and the Eddington ratio, when using the root-mean-square spectrum. However, we do not find any luminosity-dependent trends, and conclude that AGNs have diverse BLR structure and kinematics, consistent with the hypothesis... https://escholarship.org/uc/item/3rt576z3 Wed, 11 Mar 2026 00:00:00 +0000 Villafaña, Lizvette Williams, Peter R Treu, Tommaso https://orcid.org/0000-0002-8460-0390 Brewer, Brendon J Barth, Aaron J https://orcid.org/0000-0002-3026-0562 Vivian, U Bennert, Vardha N Vogler, H Alexander Guo, Hengxiao Bentz, Misty C Canalizo, Gabriela Filippenko, Alexei V Gates, Elinor https://orcid.org/0000-0002-3739-0423 Hamann, Frederick Joner, Michael D Malkan, Matthew A https://orcid.org/0000-0001-6919-1237 Woo, Jong-Hak Abolfathi, Bela Abramson, LE Armen, Stephen F Bae, Hyun-Jin Bohn, Thomas Boizelle, Benjamin D Bostroem, Azalee Brandel, Andrew Brink, Thomas G Channa, Sanyum Cooper, MC Cosens, Maren Donohue, Edward Fillingham, Sean P Gonzalez-Buitrago, Diego Halevi, Goni Halle, Andrew Hood, Carol E Horne, Keith Horst, J Chuck Kouchkovsky, Maxime de Kuhn, Benjamin Kumar, Sahana Leonard, Douglas C Loveland, Donald Manzano-King, Christina McHardy, Ian Michel, Raul Olaes, Melanie Kae B Park, Daeseong Park, Songyoun Pei, Liuyi Ross, Timothy W Runco, Jordan N Samuel, Jenna Sanchez, Javier Scott, Bryan Sexton, Remington O Shin, Jaejin Shivvers, Isaac Spencer, Chance L Stahl, Benjamin E Stegman, Samantha Stomberg, Isak Valenti, Stefano Walsh, Jonelle L Yuk, Heechan Zheng, WeiKang 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 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/0000-0003-0667-5941 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 https://escholarship.org/uc/item/74d8z25d Integral field spectroscopy (IFS) is a powerful tool for understanding the formation of galaxies across cosmic history. We present the observing strategy and first results of MSA-3D, a novel JWST program using multi-object spectroscopy in a slit-stepping strategy to produce IFS data cubes. The program observed 43 normal star-forming galaxies at redshifts 0.5 ≲ z ≲ 1.5, corresponding to the epoch when spiral thin-disk galaxies of the modern Hubble sequence are thought to emerge, obtaining kiloparsec-scale maps of rest-frame optical nebular emission lines with spectral resolution R ≃ 2700. Here we describe the multiplexed slit-stepping method, which is >15 times more efficient than the NIRSpec IFS mode for our program. As an example of the data quality, we present a case study of an individual galaxy at z = 1.104 (stellar mass M* = 1010.3M⊙, star formation rate, SFR = 3M⊙ yr−1) with prominent face-on spiral structure. We show that the galaxy exhibits a rotationally supported... https://escholarship.org/uc/item/74d8z25d Wed, 19 Nov 2025 00:00:00 +0000 Barišić, Ivana Jones, Tucker https://orcid.org/0000-0001-5860-3419 Mortensen, Kris Nanayakkara, Themiya Chen, Yuguang Sanders, Ryan Bullock, James S https://orcid.org/0000-0003-4298-5082 Bundy, Kevin Faucher-Giguère, Claude-André Glazebrook, Karl Henry, Alaina Ju, Mengting Malkan, Matthew https://orcid.org/0000-0001-6919-1237 Morishita, Takahiro Obreschkow, Danail Roy, Namrata Salcedo, Juan M Espejo Shapley, Alice E Treu, Tommaso https://orcid.org/0000-0002-8460-0390 Wang, Xin https://orcid.org/0009-0006-8812-5175 Westfall, Kyle B https://orcid.org/0000-0003-1809-6920 https://escholarship.org/uc/item/21g9j2dv The Keck Adaptive Secondary Mirror (KASM) project is planned as a core component of adaptive optics (AO) improvements for the Keck 1 telescope. KASM will provide image quality enhancements to all instrument locations, while also enabling correction of the ground layer turbulence for wide field instruments, and the foundation for a visible light diffraction-limited AO system. KASM is intended to replace the original telescope secondary mirror (M2) and will support both adaptive optics correction and purely passive (seeing-limited) observing modes of operation. The concept for KASM has been developed considering both voice coil and hybrid variable reluctance actuator technology. A metrology and calibration setup for off-sky use has been developed to verify KASM performance both prior to installation and once at the telescope. https://escholarship.org/uc/item/21g9j2dv Tue, 3 Dec 2024 00:00:00 +0000 Hinz, Philip M Holden, Brad https://orcid.org/0000-0002-6153-3076 Stelter, R Deno Radovan, Matt Hunter, Aaron Savage, Maureen Kupke, Renate Dillon, Daren Lu, Jessica https://orcid.org/0000-0001-9611-0009 Chun, Mark Wizinowich, Peter Dekany, Richard Bouchez, Antonin Sallum, Steph https://escholarship.org/uc/item/91w478p4 Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counter-rotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counter-rotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions... https://escholarship.org/uc/item/91w478p4 Fri, 6 Sep 2024 00:00:00 +0000 Chen, Yan-Mei Shi, Yong Tremonti, Christy A Bershady, Matt Merrifield, Michael Emsellem, Eric Jin, Yi-Fei Huang, Song Fu, Hai Wake, David A Bundy, Kevin Stark, David Lin, Lihwai Argudo-Fernandez, Maria Bergmann, Thaisa Storchi Bizyaev, Dmitry Brownstein, Joel Bureau, Martin Chisholm, John Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, Kai-Ke Riffel, Rogemar A Thomas, Daniel Wang, Lan Westfall, Kyle https://orcid.org/0000-0003-1809-6920 Yan, Ren-Bin https://escholarship.org/uc/item/5qs0n1bc Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. III https://escholarship.org/uc/item/5qs0n1bc Thu, 15 Aug 2024 00:00:00 +0000 Kassis, Marc F Alvarez, Carlos Baker, Ashley D Bailey, John I Banyal, Ravinder K Bertz, Rob Beichman, Charles A Bouchez, Antonin H Brown, Aaron M Brown, Matthew K Bundy, Kevin A Campbell, Randall D Chun, Mark R Cooke, Jeffrey Deich, William T Dekany, Richard G Doppmann, Greg Fassnacht, Christopher Ferrara, Jocelyn Fitzgerald, Michael P Fremling, Christoffer Fucik, Jason R Gibson, Steven R Gillingham, Peter R Glazebrook, Karl Greffe, Timothee Halverson, Samuel P Hill, Grant M Hillenbrand, Lynne Hinz, Philip M Holden, Bradford P https://orcid.org/0000-0002-6153-3076 Howard, Andrew W Huber, Daniel Jones, Tucker A Jordan, Carolyn Jovanovic, Nemanja J Kain, Isabel J Kasliwal, Mansi M Kirby, Evan Konopacky, Quinn M Krishnan, Shanti Kulkarni, Shrinivas R Kupke, Renate Lanclos, Kyle Larkin, James E Lilley, Scott J Lingvay, Larry Lu, Jessica R Lyke, James E MacDonald, Nicholas Martin, Christopher Mather, John C Matuszewski, Mateusz Mawet, Dimitri P McGurk, Rosalie C Marin, Eduardo Meeks, Robert L Millar-Blanchaer, Maxwell A Nash, Reston B Neill, James D O'Meara, John M Pahuja, Rishi Peretz, Eliad Prusinski, Nikolaus Radovan, Matthew V Rider, Kodi A Roberts, Mitsuko K Rockosi, Constance M Rubenzahl, Ryan Sallum, Stephanie E Sandford, Dale Savage, Maureen L Skemer, Andrew J Smith, Roger Steidel, Charles Steiner, Jonathan Stelter, Richard D Walawender, Josh Westfall, Kyle B Wizinowich, Peter L Wright, Shelley A Wold, Truman Zimmer, Jake https://escholarship.org/uc/item/9j94n9g9 We report the discovery of a large (∼ 8500 km diameter) infrared-bright storm at Neptune's equator in June 2017. We tracked the storm over a period of 7 months with high-cadence infrared snapshot imaging, carried out on 14 nights at the 10 m Keck II telescope and 17 nights at the Shane 120 inch reflector at Lick Observatory. The cloud feature was larger and more persistent than any equatorial clouds seen before on Neptune, remaining intermittently active from at least 10 June to 31 December 2017. Our Keck and Lick observations were augmented by very high-cadence images from the amateur community, which permitted the determination of accurate drift rates for the cloud feature. Its zonal drift speed was variable from 10 June to at least 25 July, but remained a constant 237.4 ± 0.2 m s−1 from 30 September until at least 15 November. The pressure of the cloud top was determined from radiative transfer calculations to be 0.3-0.6 bar; this value remained constant over the course of... https://escholarship.org/uc/item/9j94n9g9 Tue, 23 Jul 2024 00:00:00 +0000 Molter, Edward https://orcid.org/0000-0003-3799-9033 de Pater, Imke Luszcz-Cook, Statia Hueso, Ricardo Tollefson, Joshua Alvarez, Carlos Sánchez-Lavega, Agustín Wong, Michael H Hsu, Andrew I Sromovsky, Lawrence A Fry, Patrick M Delcroix, Marc Campbell, Randy de Kleer, Katherine Gates, Elinor https://orcid.org/0000-0002-3739-0423 Lynam, Paul David Ammons, S Mark Coy, Brandon Park Duchene, Gaspard https://orcid.org/0000-0002-5092-6464 Gonzales, Erica J Hirsch, Lea Magnier, Eugene A Ragland, Sam Rich, R Michael Wang, Feige https://escholarship.org/uc/item/7m06d2jp The observations from the Dark Energy Spectroscopic Instrument (DESI) will significantly increase the numbers of known extremely metal-poor stars by a factor of ∼10, improving the sample statistics to study the early chemical evolution of the Milky Way and the nature of the first stars. In this paper we report follow-up observations with high signal-to-noise ratio of nine metal-poor stars identified during the DESI commissioning with the Optical System for Imaging and Low-Resolution Integrated Spectroscopy (OSIRIS) instrument on the 10.4 m Gran Telescopio Canarias. The analysis of the data using a well-vetted methodology confirms the quality of the DESI spectra and the performance of the pipelines developed for the data reduction and analysis of DESI data. https://escholarship.org/uc/item/7m06d2jp Thu, 30 May 2024 00:00:00 +0000 Prieto, Carlos Allende Aguado, David S Hernández, Jonay I González Rebolo, Rafael Najita, Joan Manser, Christopher J Rockosi, Constance Slepian, Zachary Mezcua, Mar Valluri, Monica Ezzeddine, Rana Koposov, Sergey E Cooper, Andrew P Dey, Arjun Gänsicke, Boris T Li, Ting S Cunha, Katia Zou, Siwei Aguilar, Jessica Nicole Ahlen, Steven Brooks, David Claybaugh, Todd Cole, Shaun Eftekharzadeh, Sarah Fanning, Kevin Forero-Romero, Jaime Gontcho, Satya Gontcho A Honscheid, Klaus Jablonka, Pascale Kehoe, Robert Kisner, Theodore Landriau, Martin https://orcid.org/0000-0003-1838-8528 de la Macorra, Axel Meisner, Aaron Miquel, Ramón Moustakas, John Nie, Jundan Poppett, Claire Prada, Francisco Rezaie, Mehdi Rossi, Graziano Sánchez, Eusebio Schubnell, Michael Sharples, Ray Siudek, Malgorzata Smith, Verne V Tarlé, Gregory Vincenzo, Fiorenzo Weaver, Benjamin Alan Zhou, Zhimin Zou, Hu https://escholarship.org/uc/item/00r9191z Barnard’s star is a red dwarf, and has the largest proper motion (apparent motion across the sky) of all known stars. At a distance of 1.8 parsecs1, it is the closest single star to the Sun; only the three stars in the α Centauri system are closer. Barnard’s star is also among the least magnetically active red dwarfs known2,3 and has an estimated age older than the Solar System. Its properties make it a prime target for planetary searches; various techniques with different sensitivity limits have been used previously, including radial-velocity imaging4–6, astrometry7,8 and direct imaging9, but all ultimately led to negative or null results. Here we combine numerous measurements from high-precision radial-velocity instruments, revealing the presence of a low-amplitude periodic signal with a period of 233 days. Independent photometric and spectroscopic monitoring, as well as an analysis of instrumental systematic effects, suggest that this signal is best explained as arising from... https://escholarship.org/uc/item/00r9191z Tue, 19 Sep 2023 00:00:00 +0000 Ribas, I Tuomi, M Reiners, A Butler, RP Morales, JC Perger, M Dreizler, S Rodríguez-López, C González Hernández, JI Rosich, A Feng, F Trifonov, T Vogt, SS Caballero, JA Hatzes, A Herrero, E Jeffers, SV Lafarga, M Murgas, F Nelson, RP Rodríguez, E Strachan, JBP Tal-Or, L Teske, J Toledo-Padrón, B Zechmeister, M Quirrenbach, A Amado, PJ Azzaro, M Béjar, VJS Barnes, JR Berdiñas, ZM Burt, J Coleman, G Cortés-Contreras, M Crane, J Engle, SG Guinan, EF Haswell, CA Henning, Th Holden, B https://orcid.org/0000-0002-6153-3076 Jenkins, J Jones, HRA Kaminski, A Kiraga, M Kürster, M Lee, MH López-González, MJ Montes, D Morin, J Ofir, A Pallé, E Rebolo, R Reffert, S Schweitzer, A Seifert, W Shectman, SA Staab, D Street, RA Suárez Mascareño, A Tsapras, Y Wang, SX Anglada-Escudé, G https://escholarship.org/uc/item/8v69h64n The Slug Nebula is one of the largest and most luminous Lyman-alpha (LyA) nebulae discovered to date, extending over 450 kiloparsecs (kpc) around the bright quasar UM287 at z=2.283. Characterized by high surface brightnesses over intergalactic scales, its LyA emission may either trace high-density ionized gas ("clumps") or large column densities of neutral material. To distinguish between these two possibilities, information from a non-resonant line such as Halpha is crucial. Therefore, we analyzed a deep MOSFIRE observation of one of the brightest LyA emitting regions in the Slug Nebula with the goal of detecting associated Halpha emission. We also obtained a deep, moderate resolution LyA spectrum of the nearby brightest region of the Slug. We detected an Halpha flux of F_(Halpha)= 2.62 +/- 0.47 x 10^-17 erg/cm^2/s (SB_(Halpha)=2.70 +/- 0.48 x 10^-18 erg/cm^2/s/sq") at the expected spatial and spectral location. Combining the Halpha detection with its corresponding LyA flux (determined... https://escholarship.org/uc/item/8v69h64n Thu, 14 Sep 2023 00:00:00 +0000 Leibler, Camille N Cantalupo, Sebastiano Holden, Bradford P https://orcid.org/0000-0002-6153-3076 Madau, Piero https://orcid.org/0000-0002-6336-3293 https://escholarship.org/uc/item/20s178w7 HD 3167 is a bright (V = 8.9), nearby K0 star observed by the NASA K2 mission (EPIC 220383386), hosting two small, short-period transiting planets. Here we present the results of a multi-site, multi-instrument radial-velocity campaign to characterize the HD 3167 system. The masses of the transiting planets are 5.02 ±0.38 M+for HD 3167 b, a hot super-Earth with a likely rocky composition (ρb = 5.60 +2.15-1.43= g cm-3), and 9.80 +1.30-1.24 M+for HD 3167 c, a warm sub-Neptune with a likely substantial volatile complement (pc = 1.97 0.94-0.59 g cm-3). We explore the possibility of atmospheric composition analysis and determine that planet c is amenable to transmission spectroscopy measurements, and planet b is a potential thermal emission target. We detect a third, non-transiting planet, HD 3167 d, with a period of 8.509 ±0.045 d (between planets b and c) and a minimum mass of 6.90 ±0.71 M⊕. We are able to constrain the mutual inclination of planet d with planets b and c: we rule... https://escholarship.org/uc/item/20s178w7 Thu, 5 Jan 2023 00:00:00 +0000 Christiansen, Jessie L Vanderburg, Andrew Burt, Jennifer Fulton, BJ Batygin, Konstantin Benneke, Björn Brewer, John M Charbonneau, David Ciardi, David R Cameron, Andrew Collier Coughlin, Jeffrey L Crossfield, Ian JM Dressing, Courtney https://orcid.org/0000-0001-8189-0233 Greene, Thomas P Howard, Andrew W Latham, David W Molinari, Emilio Mortier, Annelies Mullally, Fergal Pepe, Francesco Rice, Ken Sinukoff, Evan Sozzetti, Alessandro Thompson, Susan E Udry, Stéphane Vogt, Steven S Barman, Travis S Batalha, Natasha E Bouchy, François Buchhave, Lars A Butler, R Paul Cosentino, Rosario Dupuy, Trent J Ehrenreich, David Fiorenzano, Aldo Hansen, Brad MS Henning, Thomas Hirsch, Lea Holden, Bradford P Isaacson, Howard T https://orcid.org/0000-0002-0531-1073 Johnson, John A Knutson, Heather A Kosiarek, Molly López-Morales, Mercedes Lovis, Christophe Malavolta, Luca Mayor, Michel Micela, Giuseppina Motalebi, Fatemeh Petigura, Erik Phillips, David F Piotto, Giampaolo Rogers, Leslie A Sasselov, Dimitar Schlieder, Joshua E Ségransan, Damien Watson, Christopher A Weiss, Lauren M https://escholarship.org/uc/item/77f6c5hq We analyze spatially resolved and co-added SDSS-IV MaNGA spectra with signal-to-noise ratio ∼100 from 2200 passive central galaxies (z ∼ 0.05) to understand how central galaxy assembly depends on stellar mass (M *) and halo mass (M h ). We control for systematic errors in M h by employing a new group catalog from Tinker and the widely used Yang et al. catalog. At fixed M *, the strengths of several stellar absorption features vary systematically with M h . Completely model-free, this is one of the first indications that the stellar populations of centrals with identical M * are affected by the properties of their host halos. To interpret these variations, we applied full spectral fitting with the code alf. At fixed M *, centrals in more massive halos are older, show lower [Fe/H], and have higher [Mg/Fe] with 3.5σ confidence. We conclude that halos not only dictate how much M * galaxies assemble but also modulate their chemical enrichment histories. Turning to our analysis at fixed... https://escholarship.org/uc/item/77f6c5hq Fri, 16 Dec 2022 00:00:00 +0000 Oyarzún, Grecco A Bundy, Kevin Westfall, Kyle B https://orcid.org/0000-0003-1809-6920 Tinker, Jeremy L Belfiore, Francesco Argudo-Fernández, Maria Zheng, Zheng Conroy, Charlie Masters, Karen L Wake, David Law, David R McDermid, Richard M Aragón-Salamanca, Alfonso Parikh, Taniya Yan, Renbin Bershady, Matthew Sánchez, Sebastián F Andrews, Brett H Fernández-Trincado, José G Lane, Richard R Bizyaev, D Boardman, Nicholas Fraser Lacerna, Ivan Brownstein, JR Drory, Niv Zhang, Kai https://escholarship.org/uc/item/7zs2q9fv We present a Bayesian inference on the neutral hydrogen fraction of the intergalactic medium (IGM), x small HI, at z ∼6-8 using the properties of Lyman break galaxies (LBGs) during the epoch of reionization. We use large samples of LBG candidates at 5.5 ≤ z ≤ 8.2 with spectroscopy from Keck/DEIMOS and Keck/MOSFIRE. For each galaxy, we incorporate either the Lyman-α (Lyα) equivalent width (EW) for detections or the EW limit spectrum for non-detections to parametrize the EW distribution at various ultraviolet brightnesses for a given redshift. Using our reference sample of galaxy candidates from the ionized universe at z ∼6.0, we are able to infer x small HI at two redshifts: z ∼6.7 and z ∼7.6. This work includes intrinsically faint, gravitationally lensed galaxies at z ∼6.0 in order to constrain the intrinsic faint-end Lyα EW distribution and provide a comparable population of galaxies to counterparts in our sample that are at higher redshift. The inclusion of faint galaxy candidates,... https://escholarship.org/uc/item/7zs2q9fv Wed, 14 Dec 2022 00:00:00 +0000 Bolan, Patricia Lemaux, Brian C Mason, Charlotte Bradač, Maruša Treu, Tommaso https://orcid.org/0000-0002-8460-0390 Strait, Victoria Pelliccia, Debora Pentericci, Laura Malkan, Matthew https://orcid.org/0000-0001-6919-1237 https://escholarship.org/uc/item/2qw2m22g This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the complete release of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which reached its goal of surveying over 10,000 nearby galaxies. The complete release of the MaNGA Stellar Library accompanies this data, providing observations of almost 30,000 stars through the MaNGA instrument during bright time. DR17 also contains the complete release of the Apache Point Observatory Galactic Evolution Experiment 2 survey that publicly releases infrared spectra of over 650,000 stars. The main sample from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), as well as the subsurvey Time Domain Spectroscopic Survey data were fully released in DR16. New single-fiber optical spectroscopy released in DR17 is from the SPectroscipic IDentification of ERosita Survey subsurvey and the eBOSS-RM program.... https://escholarship.org/uc/item/2qw2m22g Wed, 24 Aug 2022 00:00:00 +0000 Abdurro’uf Accetta, Katherine Aerts, Conny Aguirre, Víctor Silva Ahumada, Romina Ajgaonkar, Nikhil Ak, N Filiz Alam, Shadab Prieto, Carlos Allende Almeida, Andrés Anders, Friedrich Anderson, Scott F Andrews, Brett H Anguiano, Borja Aquino-Ortíz, Erik Aragón-Salamanca, Alfonso Argudo-Fernández, Maria Ata, Metin Aubert, Marie Avila-Reese, Vladimir Badenes, Carles Barbá, Rodolfo H Barger, Kat Barrera-Ballesteros, Jorge K Beaton, Rachael L Beers, Timothy C Belfiore, Francesco Bender, Chad F Bernardi, Mariangela Bershady, Matthew A Beutler, Florian Bidin, Christian Moni Bird, Jonathan C Bizyaev, Dmitry Blanc, Guillermo A Blanton, Michael R Boardman, Nicholas Fraser Bolton, Adam S Boquien, Médéric Borissova, Jura Bovy, Jo Brandt, WN Brown, Jordan Brownstein, Joel R Brusa, Marcella Buchner, Johannes Bundy, Kevin Burchett, Joseph N Bureau, Martin Burgasser, Adam https://orcid.org/0000-0002-6523-9536 Cabang, Tuesday K Campbell, Stephanie Cappellari, Michele Carlberg, Joleen K Wanderley, Fábio Carneiro Carrera, Ricardo Cash, Jennifer Chen, Yan-Ping Chen, Wei-Huai Cherinka, Brian Chiappini, Cristina Choi, Peter Doohyun Chojnowski, S Drew Chung, Haeun Clerc, Nicolas Cohen, Roger E Comerford, Julia M Comparat, Johan da Costa, Luiz Covey, Kevin Crane, Jeffrey D Cruz-Gonzalez, Irene Culhane, Connor Cunha, Katia Dai, Y Sophia Damke, Guillermo Darling, Jeremy Davidson, James W Davies, Roger Dawson, Kyle De Lee, Nathan Diamond-Stanic, Aleksandar M Cano-Díaz, Mariana Sánchez, Helena Domínguez Donor, John Duckworth, Chris Dwelly, Tom Eisenstein, Daniel J Elsworth, Yvonne P Emsellem, Eric Eracleous, Mike Escoffier, Stephanie Fan, Xiaohui Farr, Emily Feng, Shuai Fernández-Trincado, José G Feuillet, Diane Filipp, Andreas Fillingham, Sean P Frinchaboy, Peter M https://escholarship.org/uc/item/4058w3z1 The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is a dual-hemisphere, near-infrared (NIR), spectroscopic survey with the goal of producing a chemodynamical mapping of the Milky Way. The targeting for APOGEE-2 is complex and has evolved with time. In this paper, we present the updates and additions to the initial targeting strategy for APOGEE-2N presented in Zasowski et al. (2017). These modifications come in two implementation modes: (i) “Ancillary Science Programs” competitively awarded to Sloan Digital Sky Survey IV PIs through proposal calls in 2015 and 2017 for the pursuit of new scientific avenues outside the main survey, and (ii) an effective 1.5 yr expansion of the survey, known as the Bright Time Extension (BTX), made possible through accrued efficiency gains over the first years of the APOGEE-2N project. For the 23 distinct ancillary programs, we provide descriptions of the scientific aims, target selection, and how to identify these targets within... https://escholarship.org/uc/item/4058w3z1 Wed, 20 Apr 2022 00:00:00 +0000 Beaton, Rachael L Oelkers, Ryan J Hayes, Christian R Covey, Kevin R Chojnowski, SD De Lee, Nathan Sobeck, Jennifer S Majewski, Steven R Cohen, Roger E Fernández-Trincado, José Longa-Peña, Penélope O’Connell, Julia E Santana, Felipe A Stringfellow, Guy S Zasowski, Gail Aerts, Conny Anguiano, Borja Bender, Chad Cañas, Caleb I Cunha, Katia Donor, John Fleming, Scott W Frinchaboy, Peter M Feuillet, Diane Harding, Paul Hasselquist, Sten Holtzman, Jon A Johnson, Jennifer A Kollmeier, Juna A Kounkel, Marina Mahadevan, Suvrath Price-Whelan, Adrian M Rojas-Arriagada, Alvaro Román-Zúñiga, Carlos Schlafly, Edward F https://orcid.org/0000-0002-3569-7421 Schultheis, Mathias Shetrone, Matthew https://orcid.org/0000-0003-0509-2656 Simon, Joshua D Stassun, Keivan G Stutz, Amelia M Tayar, Jamie Teske, Johanna Tkachenko, Andrew Troup, Nicholas Albareti, Franco D Bizyaev, Dmitry Bovy, Jo Burgasser, Adam J https://orcid.org/0000-0002-6523-9536 Comparat, Johan Downes, Juan José Geisler, Doug Inno, Laura Manchado, Arturo Ness, Melissa K Pinsonneault, Marc H Prada, Francisco Roman-Lopes, Alexandre Simonian, Gregory VA Smith, Verne V Yan, Renbin Zamora, Olga https://escholarship.org/uc/item/4d77d3hk The Hobby–Eberly Telescope (HET) Dark Energy Experiment (HETDEX) is undertaking a blind wide-field low-resolution spectroscopic survey of 540 deg2 of sky to identify and derive redshifts for a million Lyα-emitting galaxies in the redshift range 1.9 < z < 3.5. The ultimate goal is to measure the expansion rate of the universe at this epoch, to sharply constrain cosmological parameters and thus the nature of dark energy. A major multiyear Wide-Field Upgrade (WFU) of the HET was completed in 2016 that substantially increased the field of view to 22′ diameter and the pupil to 10 m, by replacing the optical corrector, tracker, and Prime Focus Instrument Package and by developing a new telescope control system. The new, wide-field HET now feeds the Visible Integral-field Replicable Unit Spectrograph (VIRUS), a new low-resolution integral-field spectrograph (LRS2), and the Habitable Zone Planet Finder, a precision near-infrared radial velocity spectrograph. VIRUS consists of 156... https://escholarship.org/uc/item/4d77d3hk Tue, 19 Apr 2022 00:00:00 +0000 Hill, Gary J Lee, Hanshin MacQueen, Phillip J Kelz, Andreas Drory, Niv Vattiat, Brian L Good, John M Ramsey, Jason Kriel, Herman Peterson, Trent DePoy, DL Gebhardt, Karl Marshall, JL Tuttle, Sarah E Bauer, Svend M Chonis, Taylor S Fabricius, Maximilian H Froning, Cynthia Häuser, Marco Indahl, Briana L Jahn, Thomas Landriau, Martin https://orcid.org/0000-0003-1838-8528 Leck, Ron Montesano, Francesco Prochaska, Travis Snigula, Jan M Zeimann, Greg Bryant, Randy Damm, George Fowler, JR Janowiecki, Steven Martin, Jerry Mrozinski, Emily Odewahn, Stephen Rostopchin, Sergey Shetrone, Matthew https://orcid.org/0000-0003-0509-2656 Spencer, Renny Cooper, Erin Mentuch Armandroff, Taft Bender, Ralf Dalton, Gavin Hopp, Ulrich Komatsu, Eiichiro Nicklas, Harald Ramsey, Lawrence W Roth, Martin M Schneider, Donald P Sneden, Chris Steinmetz, Matthias https://escholarship.org/uc/item/38s3v07s We describe the survey design, calibration, commissioning, and emission-line detection algorithms for the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX). The goal of HETDEX is to measure the redshifts of over a million Lyα emitting galaxies between 1.88 < z < 3.52, in a 540 deg2 area encompassing a comoving volume of 10.9 Gpc3. No preselection of targets is involved; instead the HETDEX measurements are accomplished via a spectroscopic survey using a suite of wide-field integral field units distributed over the focal plane of the telescope. This survey measures the Hubble expansion parameter and angular diameter distance, with a final expected accuracy of better than 1%. We detail the project’s observational strategy, reduction pipeline, source detection, and catalog generation, and present initial results for science verification in the Cosmological Evolution Survey, Extended Groth Strip, and Great Observatories Origins Deep Survey North fields. We demonstrate that... https://escholarship.org/uc/item/38s3v07s Tue, 19 Apr 2022 00:00:00 +0000 Gebhardt, Karl Cooper, Erin Mentuch Ciardullo, Robin Acquaviva, Viviana Bender, Ralf Bowman, William P Castanheira, Barbara G Dalton, Gavin Davis, Dustin de Jong, Roelof S DePoy, DL Devarakonda, Yaswant Dongsheng, Sun Drory, Niv Fabricius, Maximilian Farrow, Daniel J Feldmeier, John Finkelstein, Steven L Froning, Cynthia S Gawiser, Eric Gronwall, Caryl Herold, Laura Hill, Gary J Hopp, Ulrich House, Lindsay R Janowiecki, Steven Jarvis, Matthew Jeong, Donghui Jogee, Shardha Kakuma, Ryota Kelz, Andreas Kollatschny, W Komatsu, Eiichiro Krumpe, Mirko Landriau, Martin https://orcid.org/0000-0003-1838-8528 Liu, Chenxu Niemeyer, Maja Lujan MacQueen, Phillip Marshall, Jennifer Mawatari, Ken McLinden, Emily M Mukae, Shiro Nagaraj, Gautam Ono, Yoshiaki Ouchi, Masami Papovich, Casey Sakai, Nao Saito, Shun Schneider, Donald P Schulze, Andreas Shanmugasundararaj, Khavvia Shetrone, Matthew https://orcid.org/0000-0003-0509-2656 Sneden, Chris Snigula, Jan Steinmetz, Matthias Thomas, Benjamin P Thomas, Brianna Tuttle, Sarah Urrutia, Tanya Wisotzki, Lutz Wold, Isak Zeimann, Gregory Zhang, Yechi https://escholarship.org/uc/item/54d8z4h9 We present a 0.4-8 μm multi-wavelength photometric catalog in the Extended Groth Strip (EGS) field. This catalog is built on the Hubble Space Telescope (HST) WFC3 and ACS data from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS), and it incorporates the existing HST data from the All-wavelength Extended Groth strip International Survey (AEGIS) and the 3D-HST program. The catalog is based on detections in the F160W band reaching a depth of F160W = 26.62 AB (90% completeness, point sources). It includes the photometry for 41,457 objects over an area of ≈ 206 arcmin2 in the following bands: HST/ACS F606W and F814W; HST WFC3 F125W, F140W, and F160W; Canada-France-Hawaii Telescope (CFHT)/Megacam u∗, g′, r′, i′ and z′; CFHT/WIRCAM J, H, and K S; Mayall/NEWFIRM J1, J2, J3, H1, H2, and K; Spitzer IRAC 3.6, 4.5, 5.8, and 8.0 μm. We are also releasing value-added catalogs that provide robust photometric redshifts and stellar mass measurements. The catalogs are... https://escholarship.org/uc/item/54d8z4h9 Tue, 14 Dec 2021 00:00:00 +0000 Stefanon, Mauro Yan, Haojing Mobasher, Bahram Barro, Guillermo Donley, Jennifer L Fontana, Adriano Hemmati, Shoubaneh Koekemoer, Anton M Lee, BoMee Lee, Seong-Kook Nayyeri, Hooshang Peth, Michael Pforr, Janine Salvato, Mara Wiklind, Tommy Wuyts, Stijn Ashby, Matthew LN Castellano, Marco Conselice, Christopher J Cooper, Michael C https://orcid.org/0000-0003-1371-6019 Cooray, Asantha R Dolch, Timothy Ferguson, Henry Galametz, Audrey Giavalisco, Mauro Guo, Yicheng Willner, Steven P Dickinson, Mark E Faber, Sandra M Fazio, Giovanni G Gardner, Jonathan P Gawiser, Eric Grazian, Andrea Grogin, Norman A Kocevski, Dale Koo, David C https://orcid.org/0000-0003-3385-6799 Lee, Kyoung-Soo Lucas, Ray A McGrath, Elizabeth J Nandra, Kirpal Newman, Jeffrey A van der Wel, Arjen https://escholarship.org/uc/item/2mv66329 We present geometric and dynamical modeling of the broad line region (BLR) for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The data set includes photometric and spectroscopic monitoring in the optical and ultraviolet, covering the Hβ, C iv, and Ly broad emission lines. We find an extended disk-like Hβ BLR with a mixture of near-circular and outflowing gas trajectories, while the C iv and Ly BLRs are much less extended and resemble shell-like structures. There is clear radial structure in the BLR, with C iv and Ly emission arising at smaller radii than the Hβ emission. Using the three lines, we make three independent black hole mass measurements, all of which are consistent. Combining these results gives a joint inference of . We examine the effect of using the V band instead of the UV continuum light curve on the results and find a size difference that is consistent with the measured UV-optical time lag, but the other structural and kinematic... https://escholarship.org/uc/item/2mv66329 Mon, 14 Jun 2021 00:00:00 +0000 Williams, PR Pancoast, A Treu, T https://orcid.org/0000-0002-8460-0390 Brewer, BJ Peterson, BM Barth, AJ https://orcid.org/0000-0002-3026-0562 Malkan, MA https://orcid.org/0000-0001-6919-1237 De Rosa, G Horne, Keith Kriss, GA Arav, N Bentz, MC Cackett, EM Bontà, E Dalla Dehghanian, M Done, C Ferland, GJ Grier, CJ Kaastra, J Kara, E Kochanek, CS Mathur, S Mehdipour, M Pogge, RW Proga, D Vestergaard, M Waters, T Adams, SM Anderson, MD Arévalo, P Beatty, TG Bennert, VN Bigley, A Bisogni, S Borman, GA Boroson, TA Bottorff, MC Brandt, WN Breeveld, AA Brotherton, M Brown, JE Brown, JS Canalizo, G Carini, MT Clubb, KI Comerford, JM Corsini, EM Crenshaw, DM Croft, S Croxall, KV Deason, AJ De Lorenzo-Cáceres, A Denney, KD Dietrich, M Edelson, R Efimova, NV Ely, J Evans, PA Fausnaugh, MM Filippenko, AV https://orcid.org/0000-0003-3460-0103 Flatland, K Fox, OD Gardner, E Gates, EL Gehrels, N Geier, S Gelbord, JM Gonzalez, L Gorjian, V Greene, JE Grupe, D Gupta, A Hall, PB Henderson, CB Hicks, S Holmbeck, E Holoien, TW-S Hutchison, T Im, M Jensen, JJ Johnson, CA Joner, MD Jones, J Kaspi, S Kelly, PL Kennea, JA Kim, M Kim, S Kim, SC King, A Klimanov, SA Knigge, C Krongold, Y Lau, MW Lee, JC Leonard, DC Li, Miao Lira, P Lochhaas, C Ma, Zhiyuan https://escholarship.org/uc/item/9n74h9fq In preparation for the Dark Energy Spectroscopic Instrument (DESI), a new top end was installed on the Mayall 4-meter telescope at Kitt Peak National Observatory. The refurbished telescope and the DESI instrument were successfully commissioned on sky between 2019 October and 2020 March. Here we describe the pointing, tracking and imaging performance of the Mayall telescope equipped with its new DESI prime focus corrector, as measured by six guider cameras sampling the outer edge of DESI's focal plane. Analyzing ∼500,000 guider images acquired during commissioning, we find a median delivered image FWHM of 1.1 arcseconds (in the r-band at 650 nm), with the distribution extending to a best-case value of ∼0.6 arcseconds. The point spread function is well characterized by a Moffat profile with a power-law index of β ≈ 3.5 and little dependence of β on FWHM. The shape and size of the PSF delivered by the new corrector at a field angle of 1.57 degrees are very similar to those measured... https://escholarship.org/uc/item/9n74h9fq Wed, 17 Mar 2021 00:00:00 +0000 Meisner, Aaron M Abareshi, Behzad Dey, Arjun Rockosi, Connie M Joyce, Richard R Sprayberry, David Besuner, Robert W Honscheid, Klaus Kirkby, David P https://orcid.org/0000-0002-8828-5463 Kong, Hui Landriau, Martin Levi, Michael E Li, Ting S Marshall, Bob Martini, Paul Ross, Ashley J Brooks, David Doel, Peter Duan, Yutong Gaztanaga, Enrique Magneville, Christophe Prada, Francisco Schubnell, Michael Tarle, Gregory https://escholarship.org/uc/item/7h46n1q2 ABSTRACT We present BVRI and unfiltered light curves of 93 Type Ia supernovae (SNe Ia) from the Lick Observatory Supernova Search (LOSS) follow-up program conducted between 2005 and 2018. Our sample consists of 78 spectroscopically normal SNe Ia, with the remainder divided between distinct subclasses (3 SN 1991bg-like, 3 SN 1991T-like, 4 SNe Iax, 2 peculiar, and 3 super-Chandrasekhar events), and has a median redshift of 0.0192. The SNe in our sample have a median coverage of 16 photometric epochs at a cadence of 5.4 d, and the median first observed epoch is ∼4.6 d before maximum B-band light. We describe how the SNe in our sample are discovered, observed, and processed, and we compare the results from our newly developed automated photometry pipeline to those from the previous processing pipeline used by LOSS. After investigating potential biases, we derive a final systematic uncertainty of 0.03 mag in BVRI for our data... https://escholarship.org/uc/item/7h46n1q2 Thu, 17 Dec 2020 00:00:00 +0000 Stahl, Benjamin E Zheng, WeiKang de Jaeger, Thomas Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Bigley, Andrew Blanchard, Kyle Blanchard, Peter K Brink, Thomas G Cargill, Samantha K Casper, Chadwick Channa, Sanyum Choi, Byung Yun Choksi, Nick Chu, Jason Clubb, Kelsey I Cohen, Daniel P Ellison, Michael Falcon, Edward Fazeli, Pegah Fuller, Kiera Ganeshalingam, Mohan Gates, Elinor L https://orcid.org/0000-0002-3739-0423 Gould, Carolina Halevi, Goni Hayakawa, Kevin T Hestenes, Julia Jeffers, Benjamin T Joubert, Niels Kandrashoff, Michael T Kim, Minkyu Kim, Haejung Kislak, Michelle E Kleiser, Io Kong, Jason J de Kouchkovsky, Maxime Krishnan, Daniel Kumar, Sahana Leja, Joel Leonard, Erin J Li, Gary Z Li, Weidong Lu, Philip Mason, Michelle N Molloy, Jeffrey Pina, Kenia Rex, Jacob Ross, Timothy W Stegman, Samantha Tang, Kevin Thrasher, Patrick Wang, Xianggao Wilkins, Andrew Yuk, Heechan Yunus, Sameen Zhang, Keto https://escholarship.org/uc/item/9j80t4m1 This paper documents the 16th data release (DR16) from the Sloan Digital Sky Surveys (SDSS), the fourth and penultimate from the fourth phase (SDSS-IV). This is the first release of data from the Southern Hemisphere survey of the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new data from APOGEE-2 North are also included. DR16 is also notable as the final data release for the main cosmological program of the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and all raw and reduced spectra from that project are released here. DR16 also includes all the data from the Time Domain Spectroscopic Survey and new data from the SPectroscopic IDentification of ERosita Survey programs, both of which were co-observed on eBOSS plates. DR16 has no new data from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey (or the MaNGA Stellar Library “MaStar”). We also preview future SDSS-V operations (due to start in 2020), and summarize plans for the... https://escholarship.org/uc/item/9j80t4m1 Tue, 18 Aug 2020 00:00:00 +0000 Ahumada, Romina Prieto, Carlos Allende Almeida, Andrés Anders, Friedrich Anderson, Scott F Andrews, Brett H Anguiano, Borja Arcodia, Riccardo Armengaud, Eric Aubert, Marie Avila, Santiago Avila-Reese, Vladimir Badenes, Carles Balland, Christophe Barger, Kat Barrera-Ballesteros, Jorge K Basu, Sarbani Bautista, Julian Beaton, Rachael L Beers, Timothy C Benavides, B Izamar T Bender, Chad F Bernardi, Mariangela Bershady, Matthew Beutler, Florian Bidin, Christian Moni Bird, Jonathan Bizyaev, Dmitry Blanc, Guillermo A Blanton, Michael R Boquien, Médéric Borissova, Jura Bovy, Jo Brandt, WN Brinkmann, Jonathan Brownstein, Joel R Bundy, Kevin Bureau, Martin Burgasser, Adam https://orcid.org/0000-0002-6523-9536 Burtin, Etienne Cano-Díaz, Mariana Capasso, Raffaella Cappellari, Michele Carrera, Ricardo Chabanier, Solène https://orcid.org/0000-0002-5692-5243 Chaplin, William Chapman, Michael Cherinka, Brian Chiappini, Cristina Choi, Peter Doohyun Chojnowski, S Drew Chung, Haeun Clerc, Nicolas Coffey, Damien Comerford, Julia M Comparat, Johan da Costa, Luiz Cousinou, Marie-Claude Covey, Kevin Crane, Jeffrey D Cunha, Katia da Silva Ilha, Gabriele Dai, Yu Sophia Damsted, Sanna B Darling, Jeremy Davidson, James W Davies, Roger Dawson, Kyle De, Nikhil de la Macorra, Axel De Lee, Nathan de Andrade Queiroz, Anna Bárbara Machado, Alice Deconto de la Torre, Sylvain Dell’Agli, Flavia du Mas des Bourboux, Hélion Diamond-Stanic, Aleksandar M Dillon, Sean Donor, John Drory, Niv Duckworth, Chris Dwelly, Tom Ebelke, Garrett Eftekharzadeh, Sarah Eigenbrot, Arthur Davis Elsworth, Yvonne P Eracleous, Mike Erfanianfar, Ghazaleh Escoffier, Stephanie Fan, Xiaohui Farr, Emily Fernández-Trincado, José G Feuillet, Diane Finoguenov, Alexis Fofie, Patricia Fraser-McKelvie, Amelia Frinchaboy, Peter M Fromenteau, Sebastien Fu, Hai Galbany, Lluís https://escholarship.org/uc/item/55n6t108 The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the universe using the baryon acoustic oscillations technique. The spectra of 35 million galaxies and quasars over 14,000 square degrees will be measured during a 5-year survey. A new prime focus corrector for the Mayall telescope at Kitt Peak National Observatory will deliver light to 5,000 individually targeted fiber-fed robotic positioners. The fibers in turn feed ten broadband multi-object spectrographs. We describe the ProtoDESI experiment, that was installed and commissioned on the 4-m Mayall telescope from 2016 August 14 to September 30. ProtoDESI was an on-sky technology demonstration with the goal to reduce technical risks associated with aligning optical fibers with targets using robotic fiber positioners and maintaining the stability required to operate DESI. The ProtoDESI prime focus instrument, consisting of three fiber positioners, illuminated fiducials, and... https://escholarship.org/uc/item/55n6t108 Tue, 18 Aug 2020 00:00:00 +0000 Fagrelius, Parker Abareshi, Behzad Allen, Lori Ballester, Otger Baltay, Charles Besuner, Robert Buckley-Geer, Elizabeth Butler, Karen Cardiel, Laia Dey, Arjun Duan, Yutong Elliott, Ann Emmet, William Gershkovich, Irena Honscheid, Klaus Illa, Jose M Jimenez, Jorge Joyce, Richard Karcher, Armin Kent, Stephen Lambert, Andrew https://orcid.org/0009-0003-5658-2601 Lampton, Michael Levi, Michael https://orcid.org/0000-0003-1887-1018 Manser, Christopher Marshall, Robert Martini, Paul Paat, Anthony Probst, Ronald Rabinowitz, David Reil, Kevin Robertson, Amy Rockosi, Connie Schlegel, David https://orcid.org/0000-0002-5042-5088 Schubnell, Michael Serrano, Santiago Silber, Joseph https://orcid.org/0000-0002-3461-0320 Soto, Christian Sprayberry, David Summers, David Tarlé, Greg Weaver, Benjamin A https://escholarship.org/uc/item/1725d2v2 We study the projected spatial offset between the ultraviolet continuum and Ly α emission for 65 lensed and unlensed galaxies in the Epoch of Reionization (5 ≤ z ≤ 7), the first such study at these redshifts, in order to understand the potential for these offsets to confuse estimates of the Ly α properties of galaxies observed in slit spectroscopy. While we find that ∼40 per cent of galaxies in our sample show significant projected spatial offsets ($|\Delta {\rm {Ly}\alpha -\rm {UV}}|$), we find a relatively modest average projected offset of $|\widetilde{\Delta }{\rm {Ly}\alpha -\rm {UV}}|$ = 0.61 ± 0.08 proper kpc for the entire sample. A small fraction of our sample, ∼10 per cent, exhibit offsets in excess of 2 proper kpc, with offsets seen up to ∼4 proper kpc, sizes that are considerably larger than the effective radii of typical galaxies at these redshifts. An internal comparison and a comparison to studies at lower redshift yielded no significant evidence of evolution of... https://escholarship.org/uc/item/1725d2v2 Sun, 9 Aug 2020 00:00:00 +0000 Lemaux, BC Fuller, S Bradač, M Pentericci, L Hoag, A Strait, V Treu, T https://orcid.org/0000-0002-8460-0390 Alvarez, C Bolan, P Gandhi, PJ Huang, K-H Jones, T https://orcid.org/0000-0001-5860-3419 Mason, C Pelliccia, D Ribeiro, B Ryan, RE Schmidt, KB Vanzella, E Khusanova, Y Le Fèvre, O Guaita, L Hathi, NP Koekemoer, A Pforr, J https://escholarship.org/uc/item/5mc2h72z In this contribution, we achieve the primary goal of the active galactic nucleus (AGN) STORM campaign by recovering velocity-delay maps for the prominent broad emission lines (Lyα, C iv, He ii, and Hβ) in the spectrum of NGC 5548. These are the most detailed velocity-delay maps ever obtained for an AGN, providing unprecedented information on the geometry, ionization structure, and kinematics of the broad-line region. Virial envelopes enclosing the emission-line responses show that the reverberating gas is bound to the black hole. A stratified ionization structure is evident. The He ii response inside 5-10 lt-day has a broad single-peaked velocity profile. The Lyα, C iv, and Hβ responses extend from inside 2 to outside 20 lt-day, with double peaks at ±2500 km s-1 in the 10-20 lt-day delay range. An incomplete ellipse in the velocity-delay plane is evident in Hβ. We interpret the maps in terms of a Keplerian disk with a well-defined outer rim at R = 20 lt-day. The far-side response... https://escholarship.org/uc/item/5mc2h72z Wed, 8 Jul 2020 00:00:00 +0000 Horne, Keith De Rosa, G Peterson, BM Barth, AJ https://orcid.org/0000-0002-3026-0562 Ely, J Fausnaugh, MM Kriss, GA Pei, L Bentz, MC Cackett, EM Edelson, R Eracleous, M Goad, MR Grier, CJ Kaastra, J Kochanek, CS Krongold, Y Mathur, S Netzer, H Proga, D Tejos, N Vestergaard, M Villforth, C Adams, SM Anderson, MD Arévalo, P Beatty, TG Bennert, VN Bigley, A Bisogni, S Borman, GA Boroson, TA Bottorff, MC Brandt, WN Breeveld, AA Brotherton, M Brown, JE Brown, JS Canalizo, G Carini, MT Clubb, KI Comerford, JM Corsini, EM Crenshaw, DM Croft, S Croxall, KV Bontà, E Dalla Deason, AJ Dehghanian, M De Lorenzo-Cáceres, A Denney, KD Dietrich, M Done, C Efimova, NV Evans, PA Ferland, GJ Filippenko, AV https://orcid.org/0000-0003-3460-0103 Flatland, K Fox, OD Gardner, E Gates, EL Gehrels, N Geier, S Gelbord, JM Gonzalez, L Gorjian, V Greene, JE Grupe, D Gupta, A Hall, PB Henderson, CB Hicks, S Holmbeck, E Holoien, TW-S Hutchison, T Im, M Jensen, JJ Johnson, CA Joner, MD Jones, J Kaspi, S Kelly, PL Kennea, JA Kim, M Kim, S Kim, SC King, A Klimanov, SA Korista, KT Lau, MW Lee, JC Leonard, DC Li, Miao Lira, P Lochhaas, C Ma, Zhiyuan MacInnis, F Malkan, MA https://orcid.org/0000-0001-6919-1237 Manne-Nicholas, ER Mauerhan, JC https://escholarship.org/uc/item/1j62j00j PypeIt is a Python package for semi-automated reduction of astronomical, spectroscopic data. Its algorithms build on decades-long development of previous data reduction pipelines by the developers (Bernstein, Burles, & Prochaska, 2015; Bochanski et al., 2009). The reduction procedure -- including a complete list of the input parameters and available functionality -- is provided as online documentation hosted by Read the Docs, which is regularly updated. (https://pypeit.readthedocs.io/en/latest/). Release v1.0.3 serves the following spectrographs: Gemini/GNIRS, Gemini/GMOS, Gemini/FLAMINGOS 2, Lick/Kast, Magellan/MagE, Magellan/Fire, MDM/OSMOS, Keck/DEIMOS (600ZD, 830G, 1200G), Keck/LRIS, Keck/MOSFIRE (J and Y gratings tested), Keck/NIRES, Keck/NIRSPEC (low-dispersion), LBT/Luci-I, Luci-II, LBT/MODS (beta), NOT/ALFOSC (grism4), VLT/X-Shooter (VIS, NIR), VLT/FORS2 (300I, 300V), WHT/ISIS. https://escholarship.org/uc/item/1j62j00j Tue, 7 Jul 2020 00:00:00 +0000 Prochaska, J Hennawi, Joseph Westfall, Kyle Cooke, Ryan Wang, Feige Hsyu, Tiffany Davies, Frederick Farina, Emanuele Pelliccia, Debora https://escholarship.org/uc/item/8ff3d7x3 Recent zoom-in cosmological simulations have shown that stellar feedback can flatten the inner density profile of the dark matter halo in low-mass galaxies. A correlation between the stellar/gas velocity dispersion (σstar, σgas) and the specific star formation rate (sSFR) is predicted as an observational test of the role of stellar feedback in re-shaping the dark matter density profile. In this work we test the validity of this prediction by studying a sample of star-forming galaxies at 0.6 < z < 1.0 from the LEGA-C survey, which provides high signal-to-noise measurements of stellar and gas kinematics. We find that a weak but significant correlation between σstar (and σgas) and sSFR indeed exists for galaxies in the lowest mass bin (M* ∼ 1010 M⊙). This correlation, albeit with a ∼35% scatter, holds for different tracers of star formation, and becomes stronger with redshift. This result generally agrees with the picture that at higher redshifts star formation rate was generally... https://escholarship.org/uc/item/8ff3d7x3 Wed, 10 Jun 2020 00:00:00 +0000 Pelliccia, Debora https://orcid.org/0000-0002-3007-0013 Mobasher, Bahram https://orcid.org/0000-0001-5846-4404 Darvish, Behnam Lemaux, Brian C Lubin, Lori M https://orcid.org/0000-0003-2119-8151 Hirtenstein, Jessie Shen, Lu Wu, Po-Feng El-Badry, Kareem Wetzel, Andrew https://orcid.org/0000-0003-0603-8942 Jones, Tucker https://orcid.org/0000-0001-5860-3419 https://escholarship.org/uc/item/7kn6z3zw The Halo Assembly in Lambda Cold Dark Matter: Observations in 7 Dimensions (HALO7D) data set consists of Keck II/DEIMOS spectroscopy and Hubble Space Telescope–measured proper motions of Milky Way halo main-sequence turnoff stars in the CANDELS fields. In this paper, the second in the HALO7D series, we present the proper motions for the HALO7D sample. We discuss our measurement methodology, which makes use of a Bayesian mixture modeling approach for creating the stationary reference frame of distant galaxies. Using the 3D kinematic HALO7D sample, we estimate the parameters of the halo velocity ellipsoid, , and the velocity anisotropy β. Using the full HALO7D sample, we find at kpc. We also estimate the ellipsoid parameters for our sample split into three apparent magnitude bins; the posterior medians for these estimates of β are consistent with one another. Finally, we estimate β in each of the individual HALO7D fields. We find that the velocity anisotropy β can vary from field-to... https://escholarship.org/uc/item/7kn6z3zw Wed, 10 Jun 2020 00:00:00 +0000 Cunningham, Emily C Deason, Alis J Sanderson, Robyn E Sohn, Sangmo Tony Anderson, Jay Guhathakurta, Puragra Rockosi, Constance M van der Marel, Roeland P Loebman, Sarah R Wetzel, Andrew https://orcid.org/0000-0003-0603-8942 https://escholarship.org/uc/item/2531p63m Orbiting planets induce a weak radial velocity (RV) shift in the host star that provides a powerful method of planet detection. Importantly, the RV technique provides information about the exoplanet mass, which is unavailable with the complementary technique of transit photometry. However, RV detection of an Earth-like planet in the ‘habitable zone’1 requires extreme spectroscopic precision that is only possible using a laser frequency comb (LFC)2. Conventional LFCs require complex filtering steps to be compatible with astronomical spectrographs, but a new chip-based microresonator device, the Kerr soliton microcomb3–8, is an ideal match for astronomical spectrograph resolution and can eliminate these filtering steps. Here, we demonstrate an atomic/molecular line-referenced soliton microcomb for calibration of astronomical spectrographs. These devices can ultimately provide LFC systems that would occupy only a few cubic centimetres9,10, thereby greatly expanding implementation... https://escholarship.org/uc/item/2531p63m Sat, 16 May 2020 00:00:00 +0000 Suh, Myoung-Gyun Yi, Xu Lai, Yu-Hung Leifer, S Grudinin, Ivan S Vasisht, G Martin, Emily C https://orcid.org/0000-0002-0618-5128 Fitzgerald, Michael P https://orcid.org/0000-0002-0176-8973 Doppmann, G Wang, J Mawet, D Papp, Scott B Diddams, Scott A Beichman, C Vahala, Kerry https://escholarship.org/uc/item/16x0j072 ABSTRACT We present catalogues of calibrated photometry and spectroscopic redshifts in the Extended Groth Strip, intended for studies of photometric redshifts (photo-z’s). The data includes ugriz photometry from Canada–France–Hawaii Telescope Legacy Survey (CFHTLS) and Y-band photometry from the Subaru Suprime camera, as well as spectroscopic redshifts from the DEEP2, DEEP3, and 3D-HST surveys. These catalogues incorporate corrections to produce effectively matched-aperture photometry across all bands, based upon object size information available in the catalogue and Moffat profile point spread function fits. We test this catalogue with a simple machine learning-based photometric redshift algorithm based upon Random Forest regression, and find that the corrected aperture photometry leads to significant improvement in photo-z accuracy compared to the original SExtractor catalogues from CFHTLS and Subaru. The deep ugrizY photometry and spectroscopic redshifts are... https://escholarship.org/uc/item/16x0j072 Tue, 12 Nov 2019 00:00:00 +0000 Zhou, Rongpu https://orcid.org/0000-0001-5381-4372 Cooper, Michael C https://orcid.org/0000-0003-1371-6019 Newman, Jeffrey A Ashby, Matthew LN Aird, James Conselice, Christopher J Davis, Marc Dutton, Aaron A Faber, SM Fang, Jerome J Fazio, GG Guhathakurta, Puragra Kocevski, Dale Koo, David C https://orcid.org/0000-0003-3385-6799 Nandra, Kirpal Phillips, Andrew C Rosario, David J Schlafly, Edward F https://orcid.org/0000-0002-3569-7421 Trump, Jonathan R Weiner, Benjamin Willmer, Christopher NA Yan, Renbin https://escholarship.org/uc/item/9fp0m8s1 Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years of operation (2014 July–2017 July). This is the third data release for SDSS-IV, and the 15th from SDSS (Data Release Fifteen; DR15). New data come from MaNGA—we release 4824 data cubes, as well as the first stellar spectra in the MaNGA Stellar Library (MaStar), the first set of survey-supported analysis products (e.g., stellar and gas kinematics, emission-line and other maps) from the MaNGA Data Analysis Pipeline, and a new data visualization and access tool we call “Marvin.” The next data release, DR16, will include new data from both APOGEE-2 and eBOSS; those surveys release no new data here, but we document updates and corrections to their data processing pipelines. The release is cumulative; it also includes the most recent reductions and calibrations of all data taken by SDSS since first light. In... https://escholarship.org/uc/item/9fp0m8s1 Fri, 27 Sep 2019 00:00:00 +0000 Aguado, DS Ahumada, Romina Almeida, Andrés Anderson, Scott F Andrews, Brett H Anguiano, Borja Ortíz, Erik Aquino Aragón-Salamanca, Alfonso Argudo-Fernández, Maria Aubert, Marie Avila-Reese, Vladimir Badenes, Carles Rembold, Sandro Barboza Barger, Kat Barrera-Ballesteros, Jorge Bates, Dominic Bautista, Julian Beaton, Rachael L Beers, Timothy C Belfiore, Francesco Bernardi, Mariangela Bershady, Matthew Beutler, Florian Bird, Jonathan Bizyaev, Dmitry Blanc, Guillermo A Blanton, Michael R Blomqvist, Michael Bolton, Adam S Boquien, Médéric Borissova, Jura Bovy, Jo Brandt, William Nielsen Brinkmann, Jonathan Brownstein, Joel R Bundy, Kevin Burgasser, Adam https://orcid.org/0000-0002-6523-9536 Byler, Nell Diaz, Mariana Cano Cappellari, Michele Carrera, Ricardo Sodi, Bernardo Cervantes Chen, Yanping Cherinka, Brian Choi, Peter Doohyun Chung, Haeun Coffey, Damien Comerford, Julia M Comparat, Johan Covey, Kevin da Silva Ilha, Gabriele da Costa, Luiz Dai, Yu Sophia Damke, Guillermo Darling, Jeremy Davies, Roger Dawson, Kyle de Sainte Agathe, Victoria Machado, Alice Deconto Del Moro, Agnese De Lee, Nathan Diamond-Stanic, Aleksandar M Sánchez, Helena Domínguez Donor, John Drory, Niv du Mas des Bourboux, Hélion Duckworth, Chris Dwelly, Tom Ebelke, Garrett Emsellem, Eric Escoffier, Stephanie Fernández-Trincado, José G Feuillet, Diane Fischer, Johanna-Laina Fleming, Scott W Fraser-McKelvie, Amelia Freischlad, Gordon Frinchaboy, Peter M Fu, Hai Galbany, Lluís Garcia-Dias, Rafael García-Hernández, DA Oehmichen, Luis Alberto Garma Maia, Marcio Antonio Geimba Gil-Marín, Héctor Grabowski, Kathleen Gu, Meng Guo, Hong Ha, Jaewon Harrington, Emily Hasselquist, Sten Hayes, Christian R Hearty, Fred Toledo, Hector Hernandez Hicks, Harry Hogg, David W Holley-Bockelmann, Kelly Holtzman, Jon A Hsieh, Bau-Ching Hunt, Jason AS https://escholarship.org/uc/item/804073m6 We present models of the Hβ-emitting broad-line region (BLR) in seven Seyfert 1 galaxies from the Lick AGN Monitoring Project 2011 sample, drawing inferences on the BLR structure and dynamics as well as the mass of the central supermassive black hole. We find that the BLR is generally a thick disk, viewed close to face-on, with preferential emission back toward the ionizing source. The dynamics in our sample range from near-circular elliptical orbits to inflowing or outflowing trajectories. We measure black hole masses of for PG 1310-108, for Mrk 50, for Mrk 141, for Mrk 279, for Mrk 1511, for NGC 4593, and for Zw 229-015. We use these black hole mass measurements along with cross-correlation time lags and line widths to recover the scale factor f used in traditional reverberation mapping measurements. Combining our results with other studies that use this modeling technique, which brings our sample size to 16, we calculate a scale factor that can be used for measuring black hole... https://escholarship.org/uc/item/804073m6 Tue, 27 Aug 2019 00:00:00 +0000 Williams, Peter R Pancoast, Anna Treu, Tommaso https://orcid.org/0000-0002-8460-0390 Brewer, Brendon J Barth, Aaron J https://orcid.org/0000-0002-3026-0562 Bennert, Vardha N Buehler, Tabitha Canalizo, Gabriela Cenko, S Bradley Clubb, Kelsey I Cooper, Michael C https://orcid.org/0000-0003-1371-6019 Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Gates, Elinor Hoenig, Sebastian F Joner, Michael D Kandrashoff, Michael T Laney, Clifton David Lazarova, Mariana S Li, Weidong Malkan, Matthew A https://orcid.org/0000-0001-6919-1237 Rex, Jacob Silverman, Jeffrey M Tollerud, Erik Walsh, Jonelle L Woo, Jong-Hak https://escholarship.org/uc/item/1h21b72k We model the ultraviolet spectra of the Seyfert 1 galaxy NGC 5548 obtained with the Hubble Space Telescope during the 6 month reverberation mapping campaign in 2014. Our model of the emission from NGC 5548 corrects for overlying absorption and deblends the individual emission lines. Using the modeled spectra, we measure the response to continuum variations for the deblended and absorption-corrected individual broad emission lines, the velocity-dependent profiles of Ly and C iv, and the narrow and broad intrinsic absorption features. We find that the time lags for the corrected emission lines are comparable to those for the original data. The velocity-binned lag profiles of Ly and C iv have a double-peaked structure indicative of a truncated Keplerian disk. The narrow absorption lines show a delayed response to continuum variations corresponding to recombination in gas with a density of ∼105 cm-3. The high-ionization narrow absorption lines decorrelate from continuum variations... https://escholarship.org/uc/item/1h21b72k Wed, 24 Jul 2019 00:00:00 +0000 Kriss, GA De Rosa, G Ely, J Peterson, BM Kaastra, J Mehdipour, M Ferland, GJ Dehghanian, M Mathur, S Edelson, R Korista, KT Arav, N Barth, AJ https://orcid.org/0000-0002-3026-0562 Bentz, MC Brandt, WN Crenshaw, DM Bontà, E Dalla Denney, KD Done, C Eracleous, M Fausnaugh, MM Gardner, E Goad, MR Grier, CJ Horne, Keith Kochanek, CS McHardy, IM Netzer, H Pancoast, A Pei, L Pogge, RW Proga, D Silva, C Tejos, N Vestergaard, M Adams, SM Anderson, MD Arévalo, P Beatty, TG Behar, E Bennert, VN Bianchi, S Bigley, A Bisogni, S Boissay-Malaquin, R Borman, GA Bottorff, MC Breeveld, AA Brotherton, M Brown, JE Brown, JS Cackett, EM Canalizo, G Cappi, M Carini, MT Clubb, KI Comerford, JM Coker, CT Corsini, EM Costantini, E Croft, S Croxall, KV Deason, AJ De Lorenzo-Cáceres, A De Marco, B Dietrich, M Di Gesu, L Ebrero, J Evans, PA Filippenko, AV https://orcid.org/0000-0003-3460-0103 Flatland, K Gates, EL Gehrels, N Geier, S Gelbord, JM Gonzalez, L Gorjian, V Grupe, D Gupta, A Hall, PB Henderson, CB Hicks, S Holmbeck, E Holoien, TW-S Hutchison, TA Im, M Jensen, JJ Johnson, CA Joner, MD Kaspi, S Kelly, BC Kelly, PL Kennea, JA Kim, M Kim, SC Kim, SY King, A Klimanov, SA Krongold, Y Lau, MW https://escholarship.org/uc/item/6d71m0bj We present the second edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 16,713 objects in the SDSS First Data Release that have luminosities larger than Mi = -22 (in a cosmology with H0 = 70 km s-1 Mpc-1, ΩM= 0.3, and Ω∇ = 0.7), have at least one emission line with FWHM larger than 1000 km s-1, and have highly reliable redshifts. The area covered by the catalog is ≈ 1360 deg 2. The quasar redshifts range from 0.08 to 5.41, with a median value of 1.43. For each object, the catalog presents positions accurate to better than 0.′2 rms per coordinate, five-band (ugriz) CCD-based photometry with typical accuracy of 0.03 mag, and information on the morphology and selection method. The catalog also contains some radio, near-infrared, and X-ray emission properties of the quasars, when available, from other large-area surveys. Calibrated digital spectra of all objects in the catalog, covering the wavelength region 3800-9200 Å at a spectral resolution... https://escholarship.org/uc/item/6d71m0bj Tue, 19 Mar 2019 00:00:00 +0000 Paris, Isabelle Petitjean, Patrick Aubourg, Eric Ross, Nicholas P Myers, Adam D Streblyanska, Alina Bailey, Stephen Hall, Patrick B Strauss, Michael A Anderson, Scott F Bizyaev, Dmitry Borde, Arnaud Brinkmann, J Bovy, Jo Brandt, William N Brewington, Howard Brownstein, Joel R Cook, Benjamin A Ebelke, Garrett Fan, Xiaohui Ak, Nurten Filiz Finley, Hayley Font-Ribera, Andreu Ge, Jian Hamann, Fred Ho, Shirley Jiang, Linhua Kinemuchi, Karen Malanushenko, Elena Malanushenko, Viktor Marchante, Moses McGreer, Ian D McMahon, Richard G Miralda-Escude, Jordi Muna, Demitri Noterdaeme, Pasquier Oravetz, Daniel Palanque-Delabrouille, Nathalie Pan, Kaike Perez-Fournon, Ismael Pieri, Matthew Riffel, Rogerio Schlegel, David J https://orcid.org/0000-0002-5042-5088 Schneider, Donald P Simmons, Audrey Viel, Matteo Weaver, Benjamin A Wood-Vasey, W Michael Yeche, Christophe York, Donald G https://escholarship.org/uc/item/4q5441zt The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014–2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as “The Cannon”; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release... https://escholarship.org/uc/item/4q5441zt Wed, 29 Aug 2018 00:00:00 +0000 Abolfathi, Bela Aguado, DS Aguilar, Gabriela Prieto, Carlos Allende Almeida, Andres Ananna, Tonima Tasnim Anders, Friedrich Anderson, Scott F Andrews, Brett H Anguiano, Borja Aragón-Salamanca, Alfonso Argudo-Fernández, Maria Armengaud, Eric Ata, Metin Aubourg, Eric Avila-Reese, Vladimir Badenes, Carles Bailey, Stephen https://orcid.org/0000-0003-4162-6619 Balland, Christophe Barger, Kathleen A Barrera-Ballesteros, Jorge Bartosz, Curtis Bastien, Fabienne Bates, Dominic Baumgarten, Falk Bautista, Julian Beaton, Rachael Beers, Timothy C Belfiore, Francesco Bender, Chad F Bernardi, Mariangela Bershady, Matthew A Beutler, Florian Bird, Jonathan C Bizyaev, Dmitry Blanc, Guillermo A Blanton, Michael R Blomqvist, Michael Bolton, Adam S Boquien, Médéric Borissova, Jura Bovy, Jo Diaz, Christian Andres Bradna Brandt, William Nielsen Brinkmann, Jonathan Brownstein, Joel R Bundy, Kevin Burgasser, Adam J https://orcid.org/0000-0002-6523-9536 Burtin, Etienne Busca, Nicolás G Cañas, Caleb I Cano-Díaz, Mariana Cappellari, Michele Carrera, Ricardo Casey, Andrew R Sodi, Bernardo Cervantes Chen, Yanping Cherinka, Brian Chiappini, Cristina Choi, Peter Doohyun Chojnowski, Drew Chuang, Chia-Hsun Chung, Haeun Clerc, Nicolas Cohen, Roger E Comerford, Julia M Comparat, Johan do Nascimento, Janaina Correa da Costa, Luiz Cousinou, Marie-Claude Covey, Kevin Crane, Jeffrey D Cruz-Gonzalez, Irene Cunha, Katia da Silva Ilha, Gabriele Damke, Guillermo J Darling, Jeremy Davidson, James W Dawson, Kyle de Icaza Lizaola, Miguel Angel C de la Macorra, Axel de la Torre, Sylvain De Lee, Nathan de Sainte Agathe, Victoria Machado, Alice Deconto Dell’Agli, Flavia Delubac, Timothée Diamond-Stanic, Aleksandar M Donor, John Downes, Juan José Drory, Niv du Mas des Bourboux, Hélion Duckworth, Christopher J Dwelly, Tom Dyer, Jamie Ebelke, Garrett Eigenbrot, Arthur Davis Eisenstein, Daniel J Elsworth, Yvonne P Emsellem, Eric https://escholarship.org/uc/item/5n19f64n The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning 2008-2015. We present modeling of these velocity-resolved reverberation mapping data sets using a geometric and dynamical model for the broad-line region (BLR). By modeling each of the three data sets independently, we infer the evolution of the BLR structure in Arp 151 over a total of 7 yr and constrain the systematic uncertainties in nonvarying parameters such as the black hole mass. We find that the BLR geometry of a thick disk viewed close to face-on is stable over this time, although the size of the BLR grows by a factor of ∼2. The dynamics of the BLR are dominated by inflow, and the inferred black hole mass is consistent for the three data sets, despite the increase in BLR size. Combining the inference for the three data sets yields a black hole mass and statistical uncertainty of log10(/) = with a standard deviation in individual measurements of 0.13 dex. https://escholarship.org/uc/item/5n19f64n Tue, 13 Mar 2018 00:00:00 +0000 Pancoast, A Barth, AJ https://orcid.org/0000-0002-3026-0562 Horne, K Treu, T https://orcid.org/0000-0002-8460-0390 Brewer, BJ Bennert, VN Canalizo, G Gates, EL Li, W Malkan, MA https://orcid.org/0000-0001-6919-1237 Sand, D Schmidt, T Valenti, S https://orcid.org/0000-0001-8818-0795 Woo, J-H Clubb, KI Cooper, MC https://orcid.org/0000-0003-1371-6019 Crawford, SM Hönig, SF Joner, MD Kandrashoff, MT Lazarova, M Nierenberg, AM Romero-Colmenero, E Son, D Tollerud, E Walsh, JL Winkler, H https://escholarship.org/uc/item/6dd6x993 The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in 2014 July. It pursues three core programs: the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). As well as its core program, eBOSS contains two major subprograms: the Time Domain Spectroscopic Survey (TDSS) and the SPectroscopic IDentification of ERosita Sources (SPIDERS). This paper describes the first data release from SDSS-IV, Data Release 13 (DR13). DR13 makes publicly available the first 1390 spatially resolved integral field unit observations of nearby galaxies from MaNGA. It includes new observations from eBOSS, completing the Sloan Extended QUasar, Emission-line galaxy, Luminous red galaxy Survey (SEQUELS), which also targeted variability-selected objects and X-ray-selected objects. DR13 includes new reductions of the SDSS-III BOSS data, improving the spectrophotometric... https://escholarship.org/uc/item/6dd6x993 Tue, 6 Feb 2018 00:00:00 +0000 Albareti, Franco D Prieto, Carlos Allende Almeida, Andres Anders, Friedrich Anderson, Scott Andrews, Brett H Aragón-Salamanca, Alfonso Argudo-Fernández, Maria Armengaud, Eric Aubourg, Eric Avila-Reese, Vladimir Badenes, Carles Bailey, Stephen https://orcid.org/0000-0003-4162-6619 Barbuy, Beatriz Barger, Kat Barrera-Ballesteros, Jorge Bartosz, Curtis Basu, Sarbani Bates, Dominic Battaglia, Giuseppina Baumgarten, Falk Baur, Julien Bautista, Julian Beers, Timothy C Belfiore, Francesco Bershady, Matthew de Lis, Sara Bertran Bird, Jonathan C Bizyaev, Dmitry Blanc, Guillermo A Blanton, Michael Blomqvist, Michael Bolton, Adam S Borissova, J Bovy, Jo Brandt, William Nielsen Brinkmann, Jonathan Brownstein, Joel R Bundy, Kevin Burtin, Etienne Busca, Nicolás G Chavez, Hugo Orlando Camacho Díaz, M Cano Cappellari, Michele Carrera, Ricardo Chen, Yanping Cherinka, Brian Cheung, Edmond Chiappini, Cristina Chojnowski, Drew Chuang, Chia-Hsun Chung, Haeun Cirolini, Rafael Fernando Clerc, Nicolas Cohen, Roger E Comerford, Julia M Comparat, Johan do Nascimento, Janaina Correa Cousinou, Marie-Claude Covey, Kevin Crane, Jeffrey D Croft, Rupert Cunha, Katia Darling, Jeremy Davidson, James W Dawson, Kyle Da Costa, Luiz Da Silva Ilha, Gabriele Machado, Alice Deconto Delubac, Timothée De Lee, Nathan De la Macorra, Axel De la Torre, Sylvain Diamond-Stanic, Aleksandar M Donor, John Downes, Juan Jose Drory, Niv Du, Cheng Du Mas des Bourboux, Hélion Dwelly, Tom Ebelke, Garrett Eigenbrot, Arthur Eisenstein, Daniel J Elsworth, Yvonne P Emsellem, Eric Eracleous, Michael Escoffier, Stephanie Evans, Michael L Falcón-Barroso, Jesús Fan, Xiaohui Favole, Ginevra Fernandez-Alvar, Emma Fernandez-Trincado, JG Feuillet, Diane Fleming, Scott W Font-Ribera, Andreu Freischlad, Gordon Frinchaboy, Peter Fu, Hai Gao, Yang https://escholarship.org/uc/item/0v44n629 We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and high signal-to-noise ratios in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially resolved spectroscopy for thousands of nearby galaxies (median ). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, and the shape of the power spectrum. Within eBOSS, we are conducting two major subprograms: the SPectroscopic IDentification of eROSITA Sources (SPIDERS), investigating X-ray AGNs and galaxies in X-ray clusters, and the Time Domain Spectroscopic Survey (TDSS), obtaining spectra of variable sources.... https://escholarship.org/uc/item/0v44n629 Tue, 1 Aug 2017 00:00:00 +0000 Blanton, Michael R Bershady, Matthew A Abolfathi, Bela Albareti, Franco D Prieto, Carlos Allende Almeida, Andres Alonso-García, Javier Anders, Friedrich Anderson, Scott F Andrews, Brett Aquino-Ortíz, Erik Aragón-Salamanca, Alfonso Argudo-Fernández, Maria Armengaud, Eric Aubourg, Eric Avila-Reese, Vladimir Badenes, Carles Bailey, Stephen https://orcid.org/0000-0003-4162-6619 Barger, Kathleen A Barrera-Ballesteros, Jorge Bartosz, Curtis Bates, Dominic Baumgarten, Falk Bautista, Julian Beaton, Rachael Beers, Timothy C Belfiore, Francesco Bender, Chad F Berlind, Andreas A Bernardi, Mariangela Beutler, Florian Bird, Jonathan C Bizyaev, Dmitry Blanc, Guillermo A Blomqvist, Michael Bolton, Adam S Boquien, Médéric Borissova, Jura van den Bosch, Remco Bovy, Jo Brandt, William N Brinkmann, Jonathan Brownstein, Joel R Bundy, Kevin Burgasser, Adam J https://orcid.org/0000-0002-6523-9536 Burtin, Etienne Busca, Nicolás G Cappellari, Michele Carigi, Maria Leticia Delgado Carlberg, Joleen K Rosell, Aurelio Carnero Carrera, Ricardo Chanover, Nancy J Cherinka, Brian Cheung, Edmond Chew, Yilen Gómez Maqueo Chiappini, Cristina Choi, Peter Doohyun Chojnowski, Drew Chuang, Chia-Hsun Chung, Haeun Cirolini, Rafael Fernando Clerc, Nicolas Cohen, Roger E Comparat, Johan da Costa, Luiz Cousinou, Marie-Claude Covey, Kevin Crane, Jeffrey D Croft, Rupert AC Cruz-Gonzalez, Irene Cuadra, Daniel Garrido Cunha, Katia Damke, Guillermo J Darling, Jeremy Davies, Roger Dawson, Kyle de la Macorra, Axel Dell’Agli, Flavia De Lee, Nathan Delubac, Timothée Di Mille, Francesco Diamond-Stanic, Aleks Cano-Díaz, Mariana Donor, John Downes, Juan José Drory, Niv du Mas des Bourboux, Hélion Duckworth, Christopher J Dwelly, Tom Dyer, Jamie Ebelke, Garrett Eigenbrot, Arthur D Eisenstein, Daniel J Emsellem, Eric Eracleous, Mike Escoffier, Stephanie Evans, Michael L Fan, Xiaohui Fernández-Alvar, Emma https://escholarship.org/uc/item/90d3n6hc Structural and Star-forming Relations since z similar to 3: Connecting Compact Star-forming and Quiescent Galaxies https://escholarship.org/uc/item/90d3n6hc Tue, 11 Jul 2017 00:00:00 +0000 Barro, Guillermo Faber, SM Koo, David C https://orcid.org/0000-0003-3385-6799 Dekel, Avishai Fang, Jerome J Trump, Jonathan R Perez-Gonzalez, Pablo G Pacifici, Camilla Primack, Joel R https://orcid.org/0000-0001-5091-5098 Somerville, Rachel S Yan, Haojing Guo, Yicheng Liu, Fengshan Ceverino, Daniel Kocevski, Dale D McGrath, Elizabeth https://escholarship.org/uc/item/2jg8m6t2 We present the stellar mass (M∗)gas-phase metallicity relation (MZR) and its scatter at intermediate redshifts (0.5 ≤ z ≤ 0.7) for 1381 field galaxies collected from deep spectroscopic surveys. The star formation rate (SFR) and color at a given M∗ of this magnitude-limited (R ≳ 24 AB) sample are representative of normal starforming galaxies. For masses below 109 Mo, our sample of 237 galaxies is ∼10 times larger than those in previous studies beyond the local universe. This huge gain in sample size enables superior constraints on the MZR and its scatter in the low-mass regime. We find a power-law MZR at 108 Mo < M∗ < 1011 Mo: 12 + log (O/H) = (5.83 ± 0.19) +(0.30 ± 0.02) log (M∗/Mo). At 109 Mo < M∗ < 1010.5 Mo, our MZR shows agreement with others measured at similar redshifts in the literature. Our power-law slope is, however, shallower than the extrapolation of the MZRs of others to masses below 109 Mo. The SFR dependence of the MZR in our sample is weaker than that... https://escholarship.org/uc/item/2jg8m6t2 Thu, 6 Jul 2017 00:00:00 +0000 Guo, Yicheng Koo, David C https://orcid.org/0000-0003-3385-6799 Lu, Yu Forbes, John C Rafelski, Marc Trump, Jonathan R Amorín, Ricardo Barro, Guillermo Davé, Romeel Faber, SM Hathi, Nimish P Yesuf, Hassen Cooper, Michael C https://orcid.org/0000-0003-1371-6019 Dekel, Avishai Guhathakurta, Puragra Kirby, Evan N Koekemoer, Anton M Pérez-González, Pablo G Lin, Lihwai Newman, Jeffery A Primack, Joel R https://orcid.org/0000-0001-5091-5098 Rosario, David J Willmer, Christopher NA Yan, Renbin https://escholarship.org/uc/item/899861jd The Seyfert 1 galaxy Zw 229-015 is among the brightest active galaxies being monitored by the Kepler mission. In order to determine the black hole mass in Zw 229-015 from Hβ reverberation mapping, we have carried out nightly observations with the Kast Spectrograph at the Lick 3 m telescope during the dark runs from 2010 June through December, obtaining 54 spectroscopic observations in total. We have also obtained nightly V-band imaging with the Katzman Automatic Imaging Telescope at Lick Observatory and with the 0.9 m telescope at the Brigham Young University West Mountain Observatory over the same period. We detect strong variability in the source, which exhibited more than a factor of two change in broad Hβ flux. From cross-correlation measurements, we find that the Hβ light curve has a rest-frame lag of 3.86+0.69−0.90 days with respect to the V-band continuum variations. We also measure reverberation lags for Hα and Hγ and find an upper limit to the Hδ lag. Combining the Hβ... https://escholarship.org/uc/item/899861jd Tue, 20 Jun 2017 00:00:00 +0000 Barth, Aaron J https://orcid.org/0000-0002-3026-0562 Nguyen, My L Malkan, Matthew A https://orcid.org/0000-0001-6919-1237 Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Li, Weidong Gorjian, Varoujan Joner, Michael D Bennert, Vardha Nicola Botyanszki, Janos Cenko, S Bradley Childress, Michael Choi, Jieun Comerford, Julia M Cucciara, Antonino da Silva, Robert Duchêne, Gaspard Fumagalli, Michele Ganeshalingam, Mohan Gates, Elinor L https://orcid.org/0000-0002-3739-0423 Gerke, Brian F Griffith, Christopher V Harris, Chelsea Hintz, Eric G Hsiao, Eric Kandrashoff, Michael T Keel, William C Kirkman, David Kleiser, Io KW Laney, C David Lee, Jeffrey Lopez, Liliana Lowe, Thomas B Moody, J Ward Morton, Alekzandir Nierenberg, AM Nugent, Peter https://orcid.org/0000-0002-3389-0586 Pancoast, Anna Rex, Jacob Rich, R Michael Silverman, Jeffrey M Smith, Graeme H Sonnenfeld, Alessandro Suzuki, Nao Tytler, David Walsh, Jonelle L Woo, Jong-Hak Yang, Yizhe Zeisse, Carl https://escholarship.org/uc/item/9g73718t During the Space Telescope and Optical Reverberation Mapping Project observations of NGC 5548, the continuum and emission-line variability became decorrelated during the second half of the six-month-long observing campaign. Here we present Swift and Chandra X-ray spectra of NGC 5548 obtained as part of the campaign. The Swift spectra show that excess flux (relative to a power-law continuum) in the soft X-ray band appears before the start of the anomalous emission-line behavior, peaks during the period of the anomaly, and then declines. This is a model-independent result suggesting that the soft excess is related to the anomaly. We divide the Swift data into on- and off-anomaly spectra to characterize the soft excess via spectral fitting. The cause of the spectral differences is likely due to a change in the intrinsic spectrum rather than to variable obscuration or partial covering. The Chandra spectra have lower signal-to-noise ratios, but are consistent with the Swift data. Our... https://escholarship.org/uc/item/9g73718t Tue, 9 May 2017 00:00:00 +0000 Mathur, S Gupta, A Page, K Pogge, RW Krongold, Y Goad, MR Adams, SM Anderson, MD Arévalo, P Barth, AJ https://orcid.org/0000-0002-3026-0562 Bazhaw, C Beatty, TG Bentz, MC Bigley, A Bisogni, S Borman, GA Boroson, TA Bottorff, MC Brandt, WN Breeveld, AA Brown, JE Brown, JS Cackett, EM Canalizo, G Carini, MT Clubb, KI Comerford, JM Coker, CT Corsini, EM Crenshaw, DM Croft, S Croxall, KV Bontà, E Dalla Deason, AJ Denney, KD De Lorenzo-Cáceres, A De Rosa, G Dietrich, M Edelson, R Ely, J Eracleous, M Evans, PA Fausnaugh, MM Ferland, GJ Filippenko, AV https://orcid.org/0000-0003-3460-0103 Flatland, K Fox, OD Gates, EL Gehrels, N Geier, S Gelbord, JM Gorjian, V Greene, JE Grier, CJ Grupe, D Hall, PB Henderson, CB Hicks, S Holmbeck, E Holoien, TW-S Horenstein, D Horne, Keith Hutchison, T Im, M Jensen, JJ Johnson, CA Joner, MD Jones, J Kaastra, J Kaspi, S Kelly, BC Kelly, PL Kennea, JA Kim, M Kim, S Kim, SC King, A Klimanov, SA Kochanek, CS Korista, KT Kriss, GA Lau, MW Lee, JC Leonard, DC Li, M Lira, P Ma, Z MacInnis, F Manne-Nicholas, ER Malkan, MA https://orcid.org/0000-0001-6919-1237 Mauerhan, JC McGurk, R McHardy, IM Montouri, C Morelli, L Mosquera, A Mudd, D Muller-Sanchez, F Musso, R Nazarov, SV https://escholarship.org/uc/item/0d12843b We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multiwavelength reverberation mapping campaign. The campaign spanned 6 months and achieved an almost daily cadence with observations from five ground-based telescopes. The Hβ and He ii λ4686 broad emission-line light curves lag that of the 5100 +-optical continuum by 4.17+0.36-0.36 and 0.79+0.35-0.34 days, respectively. The Hβ lag relative to the 1158 ultraviolet continuum light curve measured by the Hubble Space Telescope is ∼50% longer than that measured against the optical continuum, and the lag difference is consistent with the observed lag between the optical and ultraviolet continua. This suggests that the characteristic radius of the broad-line region is ∼50% larger than the value inferred from optical data alone. We also measured velocity-resolved emission-line lags for Hβ and found a complex velocity-lag structure with shorter lags in the line wings, indicative... https://escholarship.org/uc/item/0d12843b Tue, 11 Apr 2017 00:00:00 +0000 Pei, L Fausnaugh, MM Barth, AJ https://orcid.org/0000-0002-3026-0562 Peterson, BM Bentz, MC De Rosa, G Denney, KD Goad, MR Kochanek, CS Korista, KT Kriss, GA Pogge, RW Bennert, VN Brotherton, M Clubb, KI Bontà, E Dalla Filippenko, AV https://orcid.org/0000-0003-3460-0103 Greene, JE Grier, CJ Vestergaard, M Zheng, W Adams, Scott M Beatty, Thomas G Bigley, A Brown, Jacob E Brown, Jonathan S Canalizo, G Comerford, JM Coker, Carl T Corsini, EM Croft, S Croxall, KV Deason, AJ Eracleous, Michael Fox, OD Gates, EL Henderson, CB Holmbeck, E Holoien, TW-S Jensen, JJ Johnson, CA Kelly, PL Kim, S King, A Lau, MW Li, Miao Lochhaas, Cassandra Ma, Zhiyuan Manne-Nicholas, ER Mauerhan, JC Malkan, MA https://orcid.org/0000-0001-6919-1237 McGurk, R Morelli, L Mosquera, Ana Mudd, Dale Sanchez, F Muller Nguyen, ML Ochner, P Ou-Yang, B Pancoast, A Penny, Matthew T Pizzella, A Poleski, Radosław Runnoe, Jessie Scott, B Schimoia, Jaderson S Shappee, BJ Shivvers, I Simonian, Gregory V Siviero, A Somers, Garrett Stevens, Daniel J Strauss, MA Tayar, Jamie Tejos, N Treu, T https://orcid.org/0000-0002-8460-0390 Van Saders, J Vican, L Villanueva, S Yuk, H Zakamska, NL Zhu, W Anderson, MD Arévalo, P Bazhaw, C Bisogni, S Borman, GA Bottorff, MC Brandt, WN Breeveld, AA Cackett, EM Carini, MT Crenshaw, DM De Lorenzo-Cáceres, A Dietrich, M Edelson, R Efimova, NV Ely, J Evans, PA Ferland, GJ https://escholarship.org/uc/item/53h6n2s0 KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapping campaign designed to measure the broad-line region size and estimate the mass of the black hole in this galaxy. We obtained 74 epochs of spectroscopic data using the Kast Spectrograph at the Lick 3 m telescope from 2012 February to November, and obtained complementary V-band images from five other ground-based telescopes. We measured the Hβ light curve lag with respect to the V-band continuum light curve using both cross-correlation techniques (CCF) and continuum light curve variability modeling with the JAVELIN method and found rest-frame lags of days and τJAVELINdays. The Hβ rms line profile has a width of σline = 770 ± 49 km s-1. Combining these two results and assuming a virial scale factor of f = 5.13, we obtained a virial estimate of for the mass of the central black hole and an Eddington ratio... https://escholarship.org/uc/item/53h6n2s0 Thu, 2 Mar 2017 00:00:00 +0000 Pei, Liuyi Barth, Aaron J https://orcid.org/0000-0002-3026-0562 Aldering, Greg S Briley, Michael M Carroll, Carla J Carson, Daniel J Cenko, S Bradley Clubb, Kelsey I Cohen, Daniel P Cucchiara, Antonino Desjardins, Tyler D Edelson, Rick Fang, Jerome J Fedrow, Joseph M Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Fox, Ori D Furniss, Amy Gates, Elinor L Gregg, Michael Gustafson, Scott Horst, J Chuck Joner, Michael D Kelly, Patrick L Lacy, Mark Laney, C David Leonard, Douglas C Li, Weidong Malkan, Matthew A https://orcid.org/0000-0001-6919-1237 Margon, Bruce Neeleman, Marcel Nguyen, My L Prochaska, J Xavier Ross, Nathaniel R Sand, David J Searcy, Kinchen J Shivvers, Isaac S Silverman, Jeffrey M Smith, Graeme H Suzuki, Nao Smith, Krista Lynne Tytler, David Werk, Jessica K Worseck, Gábor https://escholarship.org/uc/item/11f44236 We describe the design and data analysis of the DEEP2 Galaxy Redshift Survey, the densest and largest high-precision redshift survey of galaxies at z ∼ 1 completed to date. The survey was designed to conduct a comprehensive census of massive galaxies, their properties, environments, and large-scale structure down to absolute magnitude MB = -20 at z ∼ 1 via ∼90 nights of observation on the Keck telescope. The survey covers an area of 2.8 deg2 divided into four separate fields observed to a limiting apparent magnitude of RAB = 24.1. Objects with z ≲ 0.7 are readily identifiable using BRI photometry and rejected in three of the four DEEP2 fields, allowing galaxies with z > 0.7 to be targeted ∼2.5 times more efficiently than in a purely magnitude-limited sample. Approximately 60% of eligible targets are chosen for spectroscopy, yielding nearly 53,000 spectra and more than 38,000 reliable redshift measurements. Most of the targets that fail to yield secure redshifts are blue objects... https://escholarship.org/uc/item/11f44236 Thu, 2 Mar 2017 00:00:00 +0000 Newman, Jeffrey A Cooper, Michael C https://orcid.org/0000-0003-1371-6019 Davis, Marc Faber, SM Coil, Alison L https://orcid.org/0000-0002-2583-5894 Guhathakurta, Puragra Koo, David C https://orcid.org/0000-0003-3385-6799 Phillips, Andrew C Conroy, Charlie Dutton, Aaron A Finkbeiner, Douglas P Gerke, Brian F Rosario, David J Weiner, Benjamin J Willmer, CNA Yan, Renbin Harker, Justin J Kassin, Susan A Konidaris, NP Lai, Kamson Madgwick, Darren S Noeske, KG Wirth, Gregory D Connolly, AJ Kaiser, N Kirby, Evan N Lemaux, Brian C Lin, Lihwai Lotz, Jennifer M Luppino, GA Marinoni, C Matthews, Daniel J Metevier, Anne Schiavon, Ricardo P https://escholarship.org/uc/item/8646z73c We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This “Union” compilation of 414 SNe Ia, which reduces to 307 SNe after selection cuts, includes the recent large samples of SNe Ia from the Supernova Legacy Survey and ESSENCE Survey, the older data sets, as well as the recently extended data set of distant supernovae observed with the Hubble Space Telescope (HST). A single, consistent, and blind analysis procedure is used for all the various SN Ia subsamples, and a new procedure is implemented that consistently weights the heterogeneous data sets and rejects outliers. We present the latest results from this Union compilation and discuss the cosmological constraints from this new compilation and its combination with other cosmological measurements (CMB and BAO). The constraint we obtain from supernovae on the dark energy density is ΩΛ = 0.713+... https://escholarship.org/uc/item/8646z73c Fri, 13 Jan 2017 00:00:00 +0000 Kowalski, M Rubin, D Aldering, G Agostinho, RJ Amadon, A Amanullah, R Balland, C Barbary, K Blanc, G Challis, PJ Conley, A Connolly, NV Covarrubias, R Dawson, KS Deustua, SE Ellis, R Fabbro, S Fadeyev, V https://orcid.org/0000-0003-0154-4328 Fan, X Farris, B Folatelli, G Frye, BL Garavini, G Gates, EL https://orcid.org/0000-0002-3739-0423 Germany, L Goldhaber, G Goldman, B Goobar, A Groom, DE Haissinski, J Hardin, D Hook, I Kent, S Kim, AG https://orcid.org/0000-0001-6315-8743 Knop, RA https://orcid.org/0000-0002-3803-1641 Lidman, C Linder, EV Mendez, J Meyers, J Miller, GJ Moniez, M Mourão, AM Newberg, H Nobili, S Nugent, PE https://orcid.org/0000-0002-3389-0586 Pain, R Perdereau, O Perlmutter, S https://orcid.org/0000-0002-4436-4661 Phillips, MM Prasad, V Quimby, R Regnault, N Rich, J Rubenstein, EP Ruiz-Lapuente, P Santos, FD Schaefer, BE Schommer, RA Smith, RC Soderberg, AM Spadafora, AL Strolger, L-G Strovink, M Suntzeff, NB Suzuki, N Thomas, RC Walton, NA Wang, L Wood-Vasey, WM Yun, JL https://escholarship.org/uc/item/1f8401t6 In the epoch of precise and accurate cosmology, cross-confirmation using a variety of cosmographic methods is paramount to circumvent systematic uncertainties. Owing to progenitor histories and explosion physics differing from those of Type Ia supernovae (SNe Ia), Type II-plateau supernovae (SNe II-P) are unlikely to be affected by evolution in the same way. Based on a new analysis of 17 SNe II-P, and on an improved methodology, we find that SNe II-P are good standardizable candles, almost comparable to SNe Ia. We derive a tight Hubble diagram with a dispersion of 10% in distance, using the simple correlation between luminosity and photospheric velocity introduced by Hamuy and Pinto. We show that the descendent method of Nugent et al. can be further simplified and that the correction for dust extinction has low statistical impact. We find that our SN sample favors, on average, a very steep dust law with total to selective extinction RV < 2. Such an extinction law has been recently... https://escholarship.org/uc/item/1f8401t6 Fri, 13 Jan 2017 00:00:00 +0000 Poznanski, Dovi Butler, Nathaniel Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Ganeshalingam, Mohan Li, Weidong Bloom, Joshua S Chornock, Ryan https://orcid.org/0000-0002-7706-5668 Foley, Ryan J https://orcid.org/0000-0002-2445-5275 Nugent, Peter E https://orcid.org/0000-0002-3389-0586 Silverman, Jeffrey M Cenko, S Bradley Gates, Elinor L https://orcid.org/0000-0002-3739-0423 Leonard, Douglas C Miller, Adam A Modjaz, Maryam Serduke, Frank JD Smith, Nathan Swift, Brandon J Wong, Diane S https://escholarship.org/uc/item/92r7x51m SN 1999aw was discovered during the first campaign of the Nearby Galaxies Supernova Search project. This luminous, slow-declining [Δm15(B) = 0.81 ± 0.03] Type Ia supernova was noteworthy in at least two respects. First, it occurred in an extremely low luminosity host galaxy that was not visible in the template images nor in initial subsequent deep imaging. Second, the photometric and spectral properties of this supernova indicate that it very likely was similar to the subclass of Type Ia supernovae whose prototype is SN 1999aa. This paper presents the BVRI and JsHKs light curves of SN 1999aw (through ∼100 days past maximum light), as well as several epochs of optical spectra. From these data, we calculate the bolometric light curve and give estimates of the luminosity at maximum light and the initial 56Ni mass. In addition, we present deep BVI images obtained recently with the Baade 6.5 m telescope at Las Campanas Observatory that reveal the remarkably low-luminosity host galaxy. https://escholarship.org/uc/item/92r7x51m Wed, 11 Jan 2017 00:00:00 +0000 Strolger, L-G Smith, RC Suntzeff, NB Phillips, MM Aldering, G Nugent, P https://orcid.org/0000-0002-3389-0586 Knop, R https://orcid.org/0000-0002-3803-1641 Perlmutter, S https://orcid.org/0000-0002-4436-4661 Schommer, RA Ho, LC Hamuy, M Krisciunas, K Germany, LM Covarrubias, R Candia, P Athey, A Blanc, G Bonacic, A Bowers, T Conley, A Dahlén, T Freedman, W Galaz, G Gates, E https://orcid.org/0000-0002-3739-0423 Goldhaber, G Goobar, A Groom, D Hook, IM Marzke, R Mateo, M McCarthy, P Méndez, J Muena, C Persson, SE Quimby, R Roth, M Ruiz-Lapuente, P Seguel, J Szentgyorgyi, A von Braun, K Wood-Vasey, WM York, T https://escholarship.org/uc/item/1844r5rs We present spatially resolved Atacama Large Millimeter/submillimeter Array (ALMA) 870 μm dust continuum maps of six massive, compact, dusty star-forming galaxies at z ∼ 2.5. These galaxies are selected for their small rest-frame optical sizes (reF160W ∼ 1.6 kpc) and high stellar mass densities that suggest that they are direct progenitors of compact quiescent galaxies at z ∼ 2. The deep observations yield high far-infrared (FIR) luminosities of LIR = 1012.3-12.8 L⊙ and star formation rates (SFRs) of SFR = 200-700 M o yr-1, consistent with those of typical star-forming "main sequence" galaxies. The high spatial resolution (FWHM ∼ 0.″12-0.″18) ALMA and Hubble Space Telescope photometry are combined to construct deconvolved, mean radial profiles of their stellar mass and (UV+IR) SFR. We find that the dusty, nuclear IR-SFR overwhelmingly dominates the bolometric SFR up to r ∼ 5 kpc, by a factor of over 100× from the unobscured UV-SFR. Furthermore, the effective radius of the mean... https://escholarship.org/uc/item/1844r5rs Tue, 2 Aug 2016 00:00:00 +0000 Barro, G Kriek, M Pérez-González, PG Trump, JR Koo, DC https://orcid.org/0000-0003-3385-6799 Faber, SM Dekel, A Primack, JR https://orcid.org/0000-0001-5091-5098 Guo, Y Kocevski, DD Muñoz-Mateos, JC Rujoparkarn, W Seth, K https://escholarship.org/uc/item/0w29b2rv We present estimates of intrinsic scatter in the Star Formation Rate (SFR) - Stellar Mass (M*) correlation in the redshift range 0.5 < z < 3.0 and in the mass range 10^7 < M* < 10^11 Msun. We utilize photometry in the Hubble Ultradeep Field (HUDF12), Ultraviolet Ultra Deep Field (UVUDF) campaigns and CANDELS/GOODS-S. We estimate SFR, M* from broadband Spectral Energy Distributions (SEDs) and the best available redshifts. The maximum depth of the HUDF photometry (F160W 29.9 AB, 5 sigma depth) probes the SFR-M* correlation down to M* ~ 10 ^7 Msun, a factor of 10-100X lower in M* than previous studies, and comparable to dwarf galaxies in the local universe. We find the slope of the SFR-M* relationship to be near unity at all redshifts and the normalization to decrease with cosmic time. We find a moderate increase in intrinsic scatter with cosmic time from 0.2 to 0.4 dex across the epoch of peak cosmic star formation. None of our redshift bins show a statistically significant... https://escholarship.org/uc/item/0w29b2rv Tue, 2 Aug 2016 00:00:00 +0000 Kurczynski, Peter Gawiser, Eric Acquaviva, Viviana Bell, Eric F Dekel, Avishai de Mello, Duilia F Ferguson, Henry C Gardner, Jonathan P Grogin, Norman A Guo, Yicheng Hopkins, Philip F Koekemoer, Anton M Koo, David C https://orcid.org/0000-0003-3385-6799 Lee, Seong-Kook Mobasher, Bahram Primack, Joel R https://orcid.org/0000-0001-5091-5098 Rafelski, Marc Soto, Emmaris Teplitz, Harry I https://escholarship.org/uc/item/1qh5b3v0 We describe the design and first-light early science performance of the Shane Adaptive optics infraRed Camera- Spectrograph (ShARCS) on Lick Observatory’s 3-m Shane telescope. Designed to work with the new ShaneAO adaptive optics system, ShARCS is capable of high-efficiency, diffraction-limited imaging and low-dispersion grism spectroscopy in J, H, and K-bands. ShARCS uses a HAWAII-2RG infrared detector, giving high quantum efficiency (>80%) and Nyquist sampling the diffraction limit in all three wavelength bands. The ShARCS instrument is also equipped for linear polarimetry and is sensitive down to 650 nm to support future visible-light adaptive optics capability. We report on the early science data taken during commissioning. https://escholarship.org/uc/item/1qh5b3v0 Tue, 19 Jul 2016 00:00:00 +0000 McGurk, Rosalie https://escholarship.org/uc/item/0734s9bj We measure the evolution of the quiescent fraction and quenching efficiency of satellites around star-forming and quiescent central galaxies with stellar mass at . We combine imaging from three deep near-infrared-selected surveys (ZFOURGE/CANDELS, Ultra Deep Survey, and UltraVISTA), which allows us to select a stellar-mass complete sample of satellites with . Satellites for both star-forming and quiescent central galaxies ("centrals") have higher quiescent fractions compared to field galaxies matched in stellar mass at all redshifts. We also observe "galactic conformity": satellites around quiescent centrals are more likely to be quenched compared to the satellites around star-forming centrals. In our sample, this conformity signal is significant at for , whereas it is only weakly significant at and . Therefore, conformity (and thus satellite quenching) has been present for a significant fraction of the age of the universe. The satellite quenching efficiency increases with increasing... https://escholarship.org/uc/item/0734s9bj Tue, 5 Jul 2016 00:00:00 +0000 Kawinwanichakij, Lalitwadee Quadri, Ryan F Papovich, Casey Kacprzak, Glenn G Labbé, Ivo Spitler, Lee R Straatman, Caroline MS Tran, Kim-Vy H Allen, Rebecca Behroozi, Peter Cowley, Michael Dekel, Avishai Glazebrook, Karl Hartley, WG Kelson, Daniel D Koo, David C https://orcid.org/0000-0003-3385-6799 Lee, Seong-Kook Lu, Yu Nanayakkara, Themiya Persson, S Eric Primack, Joel https://orcid.org/0000-0001-5091-5098 Tilvi, Vithal Tomczak, Adam R van Dokkum, Pieter https://escholarship.org/uc/item/2pj2g2h0 In the Spring of 2011 we carried out a 2.5 month reverberation mapping campaign using the 3 m Shane telescope at Lick Observatory, monitoring 15 low-redshift Seyfert 1 galaxies. This paper describes the observations, reductions and measurements, and data products from the spectroscopic campaign. The reduced spectra were fitted with a multicomponent model in order to isolate the contributions of various continuum and emission-line components. We present light curves of broad emission lines and the active galactic nucleus (AGN) continuum, and measurements of the broad Hβ line widths in mean and rms spectra. For the most highly variable AGNs we also measured broad Hβ line widths and velocity centroids from the nightly spectra. In four AGNs exhibiting the highest variability amplitudes, we detect anticorrelations between broad Hβ width and luminosity, demonstrating that the broad-line region "breathes" on short timescales of days to weeks in response to continuum variations. We also... https://escholarship.org/uc/item/2pj2g2h0 Tue, 16 Feb 2016 00:00:00 +0000 Barth, Aaron J https://orcid.org/0000-0002-3026-0562 Bennert, Vardha N Canalizo, Gabriela Filippenko, Alexei V https://orcid.org/0000-0003-3460-0103 Gates, Elinor L Greene, Jenny E Li, Weidong Malkan, Matthew A https://orcid.org/0000-0001-6919-1237 Pancoast, Anna Sand, David J Stern, Daniel Treu, Tommaso https://orcid.org/0000-0002-8460-0390 Woo, Jong-Hak Assef, Roberto J Bae, Hyun-Jin Brewer, Brendon J Cenko, S Bradley Clubb, Kelsey I Cooper, Michael C Diamond-Stanic, Aleksandar M Hiner, Kyle D Hönig, Sebastian F Hsiao, Eric Kandrashoff, Michael T Lazarova, Mariana S Nierenberg, AM Rex, Jacob Silverman, Jeffrey M Tollerud, Erik J Walsh, Jonelle L