V/147          The SDSS Photometric Catalogue, Release 12          (Alam+, 2015)
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Beginning of ReadMe : V/147 The SDSS Photometric Catalogue, Release 12 (Alam+, 2015) ================================================================================ The SDSS Photometric Catalogue, Data Release 12 (DR12) Alam S. et al. <Astrophys. J. Suppl. Ser. 219, 12 (2015)> =2015ApJS..219...12A =2016yCat.5147....0A ================================================================================ ADC_Keywords: Surveys; Photometry, SDSS ; Redshifts Keywords: atlases - catalogs - surveys Abstract: The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. All of the data from SDSS-III are now made public. In particular, Alam+, 2015ApJS..219...12A paper describes Data Release 11 (DR11) including all data acquired through 2013 July, and DR12 adding data acquired through 2014 July (including all data included in previous data releases), marking the end of SDSS-III observing. Relative to our previous public release (DR10), DR12 adds one million new spectra of galaxies and quasars from the Baryon Oscillation Spectroscopic Survey (BOSS) over an additional 3000deg^2^ of sky, more than triples the number of H-band spectra of stars as part of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE), and includes repeated accurate radial velocity measurements of 5500 stars from the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS). The APOGEE outputs now include the measured abundances of 15 different elements for each star. In total, SDSS-III added 5200deg^2^ of ugriz imaging. Since its first light in 1998, SDSS has imaged over 1/3 of the Celestial sphere in five bands and obtained over five million astronomical spectra. Description: Data Release 12 (DR12) is the final data release of the SDSS-III, containing all SDSS observations through July 2014. It includes the complete dataset of the BOSS and APOGEE surveys, and also newly includes stellar radial velocity measurements from MARVELS. The principal changes from previous versions are summarized at http://www.sdss.org/dr12/whatsnew/ Official SDSS-III Acknowledgement: We request that the following be added to the acknowledgement section of any paper using data from the SDSS-III. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III web site is http://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, University of Cambridge, University of Florida, the French Participation Group, the German Participation Group, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University.