THE NINTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST SPECTROSCOPIC DATA FROM THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY

Abstract

ABSTRACT The Sloan Digital Sky Survey III (SDSS-III) presents the first spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS). This ninth data release (DR9) of the SDSS project includes 535,995 new galaxy spectra (median z ∼ 0.52), 102,100 new quasar spectra (median z ∼ 2.32), and 90,897 new stellar spectra, along with the data presented in previous data releases. These spectra were obtained with the new BOSS spectrograph and were taken between 2009 December and 2011 July. In addition, the stellar parameters pipeline, which determines radial velocities, surface temperatures, surface gravities, and metallicities of stars, has been updated and refined with improvements in temperature estimates for stars with T eff < 5000 K and in metallicity estimates for stars with [Fe/H] > -0.5. DR9 includes new stellar parameters for all stars presented in DR8, including stars from SDSS-I and II, as well as those observed as part of the SEGUE-2. The astrometry error introduced in the DR8 imaging catalogs has been corrected in the DR9 data products. The next data release for SDSS-III will be in Summer 2013, which will present the first data from the APOGEE along with another year of data from BOSS, followed by the final SDSS-III data release in 2014 December.

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Affiliated Institutions

• University of California, Berkeley US
• Université Paris Cité FR
• University of Wisconsin–Madison US
• Crow Canyon Archaeological Center US
• Haverford College US
• Harvard University US
• University of Utah US
• Institut National de Physique Nucléaire et de Physique des Particules FR
• University of Virginia US
• Sorbonne Université FR
• Yale University US
• California Institute of Technology US
• Aix-Marseille Université FR
• National Observatory BR
• Hamilton College US
• Carnegie Mellon University US
• Universitat de València ES
• Universidad de La Laguna ES
• Sorbonne Paris Cité FR
• CEA Paris-Saclay FR
• Michigan State University US
• Centre National de la Recherche Scientifique FR
• Universidade Federal do Rio Grande do Sul BR
• University of California, Irvine US
• Valongo Observatory BR
• Northwestern University US
• Nanjing University CN
• Instituto de Física Corpuscular ES
• Pennsylvania State University US
• New Mexico State University US
• Osservatorio Astronomico di Padova IT
• University of Zagreb HR
• University of Florida US
• Institute for Advanced Study US
• Universitat de Barcelona ES
• Centre de physique des particules de Marseille FR
• Trieste Astronomical Observatory IT
• Erciyes University TR
• Max Planck Institute for Astronomy DE
• Commissariat à l'Énergie Atomique et aux Énergies Alternatives FR
• Kitt Peak National Observatory US
• Leibniz Institute for Astrophysics Potsdam DE
• Lawrence Berkeley National Laboratory US
• University of Zurich CH
• Croatian Geological Survey HR
• Joint Institute for Nuclear Astrophysics US
• Case Western Reserve University US
• Texas Christian University US
• Boston University US
• Kavli Institute for the Physics and Mathematics of the Universe JP
• Instituto de Astrofísica de Canarias ES
• Délégation Paris 7 FR
• Istituto Nazionale di Fisica Nucleare, Sezione di Trieste IT
• Center for Astrophysics Harvard & Smithsonian US
• Max Planck Institute for Astrophysics DE
• Institut de Recherche sur les Lois Fondamentales de l'Univers FR
• Princeton University US
• Universidade Federal do Rio de Janeiro BR
• Institut d'Astrophysique de Paris FR
• The Ohio State University US
• History of Science Society US
• Vanderbilt University US
• New York University US
• University of Washington US
• Max Planck Institute for Extraterrestrial Physics DE
• University of Portsmouth GB
• Mitchell Institute US
• The University of Tokyo JP
• Laboratoire d’Astrophysique de Marseille FR
• Laboratório Interinstitucional de e-Astronomia BR
• Heidelberg University DE
• Istituto Nazionale di Fisica Nucleare IT

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