The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey

SDSS-III Collaboration: Christopher P. Ahn , Rachael Alexandroff , Carlos Allende Prieto , Scott F. Anderson , Timothy Anderton , Brett H. Andrews , \'Eric Aubourg Stephen Bailey , Rory Barnes

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Julian Bautista Timothy C. Beers Alessandra Beifiori Andreas A. Berlind Vaishali Bhardwaj Dmitry Bizyaev Cullen H. Blake Michael R. Blanton Michael Blomqvist John J. Bochanski Adam S. Bolton Arnaud Borde Jo Bovy W. N. Brandt J. Brinkmann Peter J. Brown Joel R. Brownstein Kevin Bundy N. G. Busca William Carithers Aurelio R. Carnero Michael A. Carr Dana I. Casetti-Dinescu Yanmei Chen Cristina Chiappini Johan Comparat Natalia Connolly Justin R. Crepp Stefano Cristiani Rupert A.C. Croft Antonio J. Cuesta Luiz N. Da Costa James R. A. Davenport Kyle S. Dawson Roland de Putter Nathan De Lee Timoth\'ee Delubac Saurav Dhital Anne Ealet Garrett L. Ebelke Edward M. Edmondson Daniel J. Eisenstein S. Escoffier Massimiliano Esposito Michael L. Evans Xiaohui Fan Bruno Femen\'i a Castell\'a Emma Fern\'andez Alvar Leticia D. Ferreira N. Filiz Ak Hayley Finley Scott W. Fleming Andreu Font-Ribera Peter M. Frinchaboy D. A. Garc\'ia-Hern\'andez A. E. Garc\'ia P\'erez Jian Ge R. G\'enova-Santos Bruce A. Gillespie L\'eo Girardi Jonay I. Gonz\'alez Hern\'andez Eva K. Grebel James E. Gunn Daryl Haggard Jean-Christophe Hamilton David W. Harris Suzanne L. Hawley Frederick R. Hearty Shirley Ho David W. Hogg Jon A. Holtzman Klaus Honscheid J. Huehnerhoff Inese I. Ivans Zeljko Ivezi\'c Heather R. Jacobson Linhua Jiang Jonas Johansson Jennifer A. Johnson Guinevere Kauffmann David Kirkby Jessica A. Kirkpatrick Mark A. Klaene Gillian R. Knapp Jean-Paul Kneib Jean-Marc Le Goff Alexie Leauthaud Khee-Gan Lee Young Sun Lee Daniel C. Long Craig P. Loomis Sara Lucatello Britt Lundgren Robert H. Lupton Bo Ma Zhibo Ma Nicholas MacDonald Suvrath Mahadevan Marcio A. G. Maia Steven R. Majewski Martin Makler Elena Malanushenko Viktor Malanushenko A. Manchado Rachel Mandelbaum Marc Manera Claudia Maraston Daniel Margala Sarah L. Martell Cameron K. McBride Ian D. McGreer Richard G. McMahon Brice M\'enard Sz. Meszaros Jordi Miralda-Escud\'e Antonio D. Montero-Dorta Francesco Montesano Heather L. Morrison Demitri Muna Jeffrey A. Munn Hitoshi Murayama Adam D. Myers A. F. Neto Duy Cuong Nguyen Robert C. Nichol David L. Nidever Pasquier Noterdaeme Ricardo L. C. Ogando Matthew D. Olmstead Daniel J. Oravetz Russell Owen Nikhil Padmanabhan Nathalie Palanque-Delabrouille Kaike Pan John K. Parejko Prachi Parihar Isabelle P\^aris Petchara Pattarakijwanich Joshua Pepper Will J. Percival Ismael P\'erez-Fournon Ignasi P\'erez-R\'afols Patrick Petitjean Janine Pforr Matthew M. Pieri Marc H. Pinsonneault G. F. Porto de Mello Francisco Prada Adrian M. Price-Whelan M. Jordan Raddick Rafael Rebolo James Rich Gordon T. Richards Annie C. Robin Helio J. Rocha-Pinto Constance M. Rockosi Natalie A. Roe Ashley J. Ross Nicholas P. Ross J. A. Rubi\~no-Martin Lado Samushia J. Sanchez Almeida Ariel G. S\'anchez Bas\'ilio Santiago Conor Sayres David J. Schlegel Katharine J. Schlesinger Sarah J. Schmidt Donald P. Schneider Axel D. Schwope C. G. Sc\'occola Uros Seljak Erin Sheldon Yue Shen Yiping Shu Jennifer Simmerer Audrey E. Simmons Ramin A. Skibba A. Slosar Flavia Sobreira Jennifer S. Sobeck Keivan G. Stassun Oliver Steele Matthias Steinmetz Michael A. Strauss Molly E. C. Swanson Tomer Tal Aniruddha R. Thakar Daniel Thomas Benjamin A. Thompson Jeremy L. Tinker Rita Tojeiro Christy A. Tremonti M. Vargas Maga\~na Licia Verde Matteo Viel Shailendra K. Vikas Nicole P. Vogt David A. Wake Ji Wang Benjamin A. Weaver David H. Weinberg Benjamin J. Weiner Andrew A. West Martin White John C. Wilson John P. Wisniewski W. M. Wood-Vasey Brian Yanny Christophe Y\`eche Donald G. York O. Zamora Gail Zasowski Idit Zehavi Gong-Bo Zhao Zheng Zheng Guangtun Zhu Joel C. Zinn

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keywords datasdss-iiistarsreleasespectraspectroscopicsurveyboss

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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 SDSS-III Sloan Extension for Galactic Understanding and Exploration-2 (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 Apache Point Observatory Galactic Evolution Experiment (APOGEE) along with another year of data from BOSS, followed by the final SDSS-III data release in December 2014.

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