Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
Creators: name: Blanton, Michael R.
name: Bershady, Matthew A.
name: Abolfathi, Bela
name: Albareti, Franco D.
name: Prieto, Carlos Allende
name: Almeida, Andres
name: Alonso-García, Javier
name: Anders, Friedrich
name: Anderson, Scott F.
name: Andrews, Brett
name: Aquino-Ortíz, Erik
name: Aragón-Salamanca, Alfonso
name: Argudo-Fernández, Maria
name: Armengaud, Eric
name: Aubourg, Eric
name: Avila-Reese, Vladimir
name: Badenes, Carles
name: Bailey, Stephen
name: Barger, Kathleen A.
name: Barrera-Ballesteros, Jorge
name: Bartosz, Curtis
name: Bates, Dominic
name: Baumgarten, Falk
name: Bautista, Julian
name: Beaton, Rachael
name: Beers, Timothy C.
name: Belfiore, Francesco
name: Bender, Chad F.
name: Berlind, Andreas A.
name: Bernardi, Mariangela
name: Beutler, Florian
name: Bird, Jonathan C.
name: Bizyaev, Dmitry
name: Blanc, Guillermo A.
name: Blomqvist, Michael
name: Bolton, Adam S.
name: Boquien, Médéric
name: Borissova, Jura
name: Bosch, Remco Van Den
name: Bovy, Jo
name: Brandt, William N.
name: Brinkmann, Jonathan
name: Brownstein, Joel R.
name: Bundy, Kevin
name: Burgasser, Adam J.
name: Burtin, Etienne
name: Busca, Nicolás G.
name: Cappellari, Michele
name: Carigi, Maria Leticia Delgado
name: Carlberg, Joleen K.
name: Rosell, Aurelio Carnero
name: Carrera, Ricardo
name: Chanover, Nancy J.
name: Cherinka, Brian
name: Cheung, Edmond
name: Chew, Yilen Gómez Maqueo
name: Chiappini, Cristina
name: Choi, Peter Doohyun
name: Chojnowski, Drew
name: Chuang, Chia-Hsun
name: Chung, Haeun
name: Cirolini, Rafael Fernando
name: Clerc, Nicolas
name: Cohen, Roger E.
name: Comparat, Johan
name: Costa, Luiz Da
name: Cousinou, Marie-Claude
name: Covey, Kevin
name: Crane, Jeffrey D.
name: Croft, Rupert A. C.
name: Cruz-Gonzalez, Irene
name: Cuadra, Daniel Garrido
name: Cunha, Katia
name: Damke, Guillermo J.
name: Darling, Jeremy
name: Davies, Roger
name: Dawson, Kyle
name: Macorra, Axel De La
name: Dell’Agli, Flavia
name: Lee, Nathan De
name: Delubac, Timothée
name: Mille, Francesco Di
name: Diamond-Stanic, Aleks
name: Cano-Díaz, Mariana
name: Donor, John
name: Downes, Juan José
name: Drory, Niv
name: Bourboux, Hélion Du Mas Des
name: Duckworth, Christopher J.
name: Dwelly, Tom
name: Dyer, Jamie
name: Ebelke, Garrett
name: Eigenbrot, Arthur D.
name: Eisenstein, Daniel J.
name: Emsellem, Eric
name: Eracleous, Mike
name: Escoffier, Stephanie
name: Evans, Michael L.
name: Fan, Xiaohui
name: Fernández-Alvar, Emma
Publisher: name: Humboldt-Universität zu Berlin
Year: 2017
Subjects: subject: cosmology: observations
subject: galaxies: general
subject: Galaxy: general
subject: instrumentation: spectrographs
subject: stars: general
subject: surveys
subject: 520 Astronomie und zugeordnete Wissenschaften

description: 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. 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.