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arXiv: 1703.00052
Abstract 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.
GRAVITATIONAL LENSING EXPERIMENT, ddc:520, Astronomical Sciences, 5109 Space Sciences, Surveys, 5101 Astronomical Sciences (for-2020), X-RAY SURVEY, OSCILLATION SPECTROSCOPIC SURVEY, Stars general, QB Astronomy, spectrographs [Instrumentation], 5107 Particle and high energy physics (for-2020), VELOCITY EXPERIMENT RAVE, observations [Cosmology], stars: general, QC, QB, instrumentation: spectrographs, SDSS-III/APOGEE SURVEY, general [Stars], Cosmology: observations, 51 Physical Sciences (for-2020), general [stars], general [Galaxies], 520 Astronomie und zugeordnete Wissenschaften, Cosmology observations, 520, observations [cosmology], Q1 Science (General) / természettudomány általában, Stars: general, Particle and high energy physics, 5101 Astronomical Sciences, Physical Sciences, Space Sciences, 51 Physical Sciences, Astronomical and Space Sciences, Galaxies: general, GALACTIC EVOLUTION EXPERIMENT, EXPLORING HALO SUBSTRUCTURE, astro-ph.GA, FOS: Physical sciences, Instrumentation: spectrographs, 0201 Astronomical and Space Sciences (for), Astronomy & Astrophysics, 530, ROSAT ALL-SKY, Galaxies general, surveys, Galaxy: general, general [Galaxy], 5101 Astronomical sciences (for-2020), Science & Technology, Astronomy & Astrophysics (science-metrix), Instrumentation spectrographs, DAS, 5109 Space Sciences (for-2020), Astrophysics - Astrophysics of Galaxies, galaxies: general, QC Physics, QUASAR LUMINOSITY FUNCTION, cosmology: observations, Astrophysics of Galaxies (astro-ph.GA), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], DATA REDUCTION PIPELINE, general [galaxies], spectrographs [instrumentation]
GRAVITATIONAL LENSING EXPERIMENT, ddc:520, Astronomical Sciences, 5109 Space Sciences, Surveys, 5101 Astronomical Sciences (for-2020), X-RAY SURVEY, OSCILLATION SPECTROSCOPIC SURVEY, Stars general, QB Astronomy, spectrographs [Instrumentation], 5107 Particle and high energy physics (for-2020), VELOCITY EXPERIMENT RAVE, observations [Cosmology], stars: general, QC, QB, instrumentation: spectrographs, SDSS-III/APOGEE SURVEY, general [Stars], Cosmology: observations, 51 Physical Sciences (for-2020), general [stars], general [Galaxies], 520 Astronomie und zugeordnete Wissenschaften, Cosmology observations, 520, observations [cosmology], Q1 Science (General) / természettudomány általában, Stars: general, Particle and high energy physics, 5101 Astronomical Sciences, Physical Sciences, Space Sciences, 51 Physical Sciences, Astronomical and Space Sciences, Galaxies: general, GALACTIC EVOLUTION EXPERIMENT, EXPLORING HALO SUBSTRUCTURE, astro-ph.GA, FOS: Physical sciences, Instrumentation: spectrographs, 0201 Astronomical and Space Sciences (for), Astronomy & Astrophysics, 530, ROSAT ALL-SKY, Galaxies general, surveys, Galaxy: general, general [Galaxy], 5101 Astronomical sciences (for-2020), Science & Technology, Astronomy & Astrophysics (science-metrix), Instrumentation spectrographs, DAS, 5109 Space Sciences (for-2020), Astrophysics - Astrophysics of Galaxies, galaxies: general, QC Physics, QUASAR LUMINOSITY FUNCTION, cosmology: observations, Astrophysics of Galaxies (astro-ph.GA), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], DATA REDUCTION PIPELINE, general [galaxies], spectrographs [instrumentation]
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