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Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe

  • Author(s): Blanton, MR
  • Bershady, MA
  • Abolfathi, B
  • Albareti, FD
  • Prieto, CA
  • Almeida, A
  • Alonso-García, J
  • Anders, F
  • Anderson, SF
  • Andrews, B
  • Aquino-Ortíz, E
  • Aragón-Salamanca, A
  • Argudo-Fernández, M
  • Armengaud, E
  • Aubourg, E
  • Avila-Reese, V
  • Badenes, C
  • Bailey, S
  • Barger, KA
  • Barrera-Ballesteros, J
  • Bartosz, C
  • Bates, D
  • Baumgarten, F
  • Bautista, J
  • Beaton, R
  • Beers, TC
  • Belfiore, F
  • Bender, CF
  • Berlind, AA
  • Bernardi, M
  • Beutler, F
  • Bird, JC
  • Bizyaev, D
  • Blanc, GA
  • Blomqvist, M
  • Bolton, AS
  • Boquien, M
  • Borissova, J
  • Bosch, RVD
  • Bovy, J
  • Brandt, WN
  • Brinkmann, J
  • Brownstein, JR
  • Bundy, K
  • Burgasser, AJ
  • Burtin, E
  • Busca, NG
  • Cappellari, M
  • Carigi, MLD
  • Carlberg, JK
  • Rosell, AC
  • Carrera, R
  • Chanover, NJ
  • Cherinka, B
  • Cheung, E
  • Chew, YGM
  • Chiappini, C
  • Choi, PD
  • Chojnowski, D
  • Chuang, CH
  • Chung, H
  • Cirolini, RF
  • Clerc, N
  • Cohen, RE
  • Comparat, J
  • Costa, LD
  • Cousinou, MC
  • Covey, K
  • Crane, JD
  • Croft, RAC
  • Cruz-Gonzalez, I
  • Cuadra, DG
  • Cunha, K
  • Damke, GJ
  • Darling, J
  • Davies, R
  • Dawson, K
  • Macorra, ADL
  • Dell'Agli, F
  • et al.
Abstract

© 2017. The American Astronomical Society. All rights reserved. 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 z ∼ 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between z ~ 0.6 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. All programs use the 2.5 m Sloan Foundation Telescope at the Apache Point Observatory; observations there began in Summer 2014. APOGEE-2 also operates a second near-infrared spectrograph at the 2.5 m du Pont Telescope at Las Campanas Observatory, with observations beginning in early 2017. Observations at both facilities are scheduled to continue through 2020. In keeping with previous SDSS policy, SDSS-IV provides regularly scheduled public data releases; the first one, Data Release 13, was made available in 2016 July.

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