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Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
Blanton, Michael R.,Bershady, Matthew A.,Abolfathi, Bela,Albareti, Franco D.,Prieto, Carlos Allende,Almeida, Andres,Alonso-Garcí,a, Javier,Anders, Friedrich,Anderson, Scott F.,Andrews, Brett,Aqu American Institute of Physics 2017 The Astronomical journal Vol.154 No.1
<P>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 similar to 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between z similar to 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.</P>
Cosmological constraints from the SDSS luminous red galaxies
Tegmark, Max,Eisenstein, Daniel J.,Strauss, Michael A.,Weinberg, David H.,Blanton, Michael R.,Frieman, Joshua A.,Fukugita, Masataka,Gunn, James E.,Hamilton, Andrew J. S.,Knapp, Gillian R.,Nichol, Robe American Physical Society 2006 PHYSICAL REVIEW D - Vol.74 No.12
The Sloan Digital Sky Survey Quasar Catalog: Fourteenth data release
Pâ,ris, Isabelle,Petitjean, Patrick,Aubourg, É,ric,Myers, Adam D.,Streblyanska, Alina,Lyke, Brad W.,Anderson, Scott F.,Armengaud, É,ric,Bautista, Julian,Blanton, Michael R.,Blomqvist, Springer-Verlag 2018 Astronomy and astrophysics Vol.613 No.-
<P>We present the data release 14 Quasar catalog (DR14Q) from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digital Sky Survey IV (SDSS-IV). This catalog includes all SDSS-IV/eBOSS objects that were spectroscopically targeted as quasar candidates and that are confirmed as quasars via a new automated procedure combined with a partial visual inspection of spectra, have luminosities <I>M</I>i [<I>z</I> = 2] < −20.5 (in a Λ CDM cosmology with <I>H</I>0 = 70 km s<SUP>−1</SUP> Mpc<SUP>−1</SUP>, Ω M =0.3, and Ω Λ = 0.7), and either display at least one emission line with a full width at half maximum larger than 500 km s<SUP>−1</SUP> or, if not, have interesting/complex absorption features. The catalog also includes previously spectroscopically-confirmed quasars from SDSS-I, II, and III. The catalog contains 526 356 quasars (144 046 are new discoveries since the beginning of SDSS-IV) detected over 9376 deg<SUP>2</SUP> (2044 deg<SUP>2</SUP> having new spectroscopic data available) with robust identification and redshift measured by a combination of principal component eigenspectra. The catalog is estimated to have about 0.5% contamination. Redshifts are provided for the Mg II emission line. The catalog identifies 21 877 broad absorption line quasars and lists their characteristics. For each object, the catalog presents five-band (<I>u</I>, <I>g</I>, <I>r</I>, <I>i</I>, <I>z</I>) CCD-based photometry with typical accuracy of 0.03 mag. The catalog also contains X-ray, ultraviolet, near-infrared, and radio emission properties of the quasars, when available, from other large-area surveys. The calibrated digital spectra, covering the wavelength region 3610-10 140 Å at a spectral resolution in the range 1300 < <I>R</I> < 2500, can be retrieved from the SDSS Science Archiver Server.</P>