The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
Creators: name: III Collaboration
name: Ahn, Christopher P.
name: Alexandroff, Rachael
name: Prieto, Carlos Allende
name: Anderson, Scott F.
name: Anderton, Timothy
name: Andrews, Brett H.
name: Bailey, Éric Aubourg Stephen
name: Barnes, Rory
name: Bautista, Julian
name: Beers, Timothy C.
name: Beifiori, Alessandra
name: Berlind, Andreas A.
name: Bhardwaj, Vaishali
name: Bizyaev, Dmitry
name: Blake, Cullen H.
name: Blanton, Michael R.
name: Blomqvist, Michael
name: Bochanski, John J.
name: Bolton, Adam S.
name: Borde, Arnaud
name: Bovy, Jo
name: Brandt, W. N.
name: Brinkmann, J.
name: Brown, Peter J.
name: Brownstein, Joel R.
name: Bundy, Kevin
name: Busca, N. G.
name: Carithers, William
name: Carnero, Aurelio R.
name: Carr, Michael A.
name: Casetti-Dinescu, Dana I.
name: Chen, Yanmei
name: Chiappini, Cristina
name: Comparat, Johan
name: Connolly, Natalia
name: Crepp, Justin R.
name: Cristiani, Stefano
name: Croft, Rupert A. C.
name: Cuesta, Antonio J.
name: da Costa, Luiz N.
name: Davenport, James R. A.
name: Dawson, Kyle S.
name: de Putter, Roland
name: De Lee, Nathan
name: Delubac, Timothée
name: Dhital, Saurav
name: Ealet, Anne
name: Ebelke, Garrett L.
name: Edmondson, Edward M.
name: Eisenstein, Daniel J.
name: Escoffier, S.
name: Esposito, Massimiliano
name: Evans, Michael L.
name: Fan, Xiaohui
name: Castellá, Bruno Femení a
name: Alvar, Emma Fernández
name: Ferreira, Leticia D.
name: Ak, N. Filiz
name: Finley, Hayley
name: Fleming, Scott W.
name: Font-Ribera, Andreu
name: Frinchaboy, Peter M.
name: García-Hernández, D. A.
name: Pérez, A. E. García
name: Ge, Jian
name: Génova-Santos, R.
name: Gillespie, Bruce A.
name: Girardi, Léo
name: Hernández, Jonay I. González
name: Grebel, Eva K.
name: Gunn, James E.
name: Haggard, Daryl
name: Hamilton, Jean-Christophe
name: Harris, David W.
name: Hawley, Suzanne L.
name: Hearty, Frederick R.
name: Ho, Shirley
name: Hogg, David W.
name: Holtzman, Jon A.
name: Honscheid, Klaus
name: Huehnerhoff, J.
name: Ivans, Inese I.
name: Ivezić, Zeljko
name: Jacobson, Heather R.
name: Jiang, Linhua
name: Johansson, Jonas
name: Johnson, Jennifer A.
name: Kauffmann, Guinevere
name: Kirkby, David
name: Kirkpatrick, Jessica A.
name: Klaene, Mark A.
name: Knapp, Gillian R.
name: Kneib, Jean-Paul
name: Goff, Jean-Marc Le
name: Leauthaud, Alexie
name: Lee, Khee-Gan
name: Lee, Young Sun
name: Long, Daniel C.
name: Loomis, Craig P.
name: Lucatello, Sara
name: Lundgren, Britt
name: Lupton, Robert H.
name: Ma, Bo
name: Ma, Zhibo
name: MacDonald, Nicholas
name: Mahadevan, Suvrath
name: Maia, Marcio A. G.
name: Majewski, Steven R.
name: Makler, Martin
name: Malanushenko, Elena
name: Malanushenko, Viktor
name: Manchado, A.
name: Mandelbaum, Rachel
name: Manera, Marc
name: Maraston, Claudia
name: Margala, Daniel
name: Martell, Sarah L.
name: McBride, Cameron K.
name: McGreer, Ian D.
name: McMahon, Richard G.
name: Ménard, Brice
name: Meszaros, Sz.
name: Miralda-Escudé, Jordi
name: Montero-Dorta, Antonio D.
name: Montesano, Francesco
name: Morrison, Heather L.
name: Muna, Demitri
name: Munn, Jeffrey A.
name: Murayama, Hitoshi
name: Myers, Adam D.
name: Neto, A. F.
name: Nguyen, Duy Cuong
name: Nichol, Robert C.
name: Nidever, David L.
name: Noterdaeme, Pasquier
name: Ogando, Ricardo L. C.
name: Olmstead, Matthew D.
name: Oravetz, Daniel J.
name: Owen, Russell
name: Padmanabhan, Nikhil
name: Palanque-Delabrouille, Nathalie
name: Pan, Kaike
name: Parejko, John K.
name: Parihar, Prachi
name: Pâris, Isabelle
name: Pattarakijwanich, Petchara
name: Pepper, Joshua
name: Percival, Will J.
name: Pérez-Fournon, Ismael
name: Pérez-Ráfols, Ignasi
name: Petitjean, Patrick
name: Pforr, Janine
name: Pieri, Matthew M.
name: Pinsonneault, Marc H.
name: de Mello, G. F. Porto
name: Prada, Francisco
name: Price-Whelan, Adrian M.
name: Raddick, M. Jordan
name: Rebolo, Rafael
name: Rich, James
name: Richards, Gordon T.
name: Robin, Annie C.
name: Rocha-Pinto, Helio J.
name: Rockosi, Constance M.
name: Roe, Natalie A.
name: Ross, Ashley J.
name: Ross, Nicholas P.
name: Rubiño-Martin, J. A.
name: Samushia, Lado
name: Almeida, J. Sanchez
name: Sánchez, Ariel G.
name: Santiago, Basílio
name: Sayres, Conor
name: Schlegel, David J.
name: Schlesinger, Katharine J.
name: Schmidt, Sarah J.
name: Schneider, Donald P.
name: Schwope, Axel D.
name: Scóccola, C. G.
name: Seljak, Uros
name: Sheldon, Erin
name: Shen, Yue
name: Shu, Yiping
name: Simmerer, Jennifer
name: Simmons, Audrey E.
name: Skibba, Ramin A.
name: Slosar, A.
name: Sobreira, Flavia
name: Sobeck, Jennifer S.
name: Stassun, Keivan G.
name: Steele, Oliver
name: Steinmetz, Matthias
name: Strauss, Michael A.
name: Swanson, Molly E. C.
name: Tal, Tomer
name: Thakar, Aniruddha R.
name: Thomas, Daniel
name: Thompson, Benjamin A.
name: Tinker, Jeremy L.
name: Tojeiro, Rita
name: Tremonti, Christy A.
name: Magaña, M. Vargas
name: Verde, Licia
name: Viel, Matteo
name: Vikas, Shailendra K.
name: Vogt, Nicole P.
name: Wake, David A.
name: Wang, Ji
name: Weaver, Benjamin A.
name: Weinberg, David H.
name: Weiner, Benjamin J.
name: West, Andrew A.
name: White, Martin
name: Wilson, John C.
name: Wisniewski, John P.
name: Wood-Vasey, W. M.
name: Yanny, Brian
name: Yèche, Christophe
name: York, Donald G.
name: Zamora, O.
name: Zasowski, Gail
name: Zehavi, Idit
name: Zhao, Gong-Bo
name: Zheng, Zheng
name: Zhu, Guangtun
name: Zinn, Joel C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: 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&lt;5000 K and in metallicity estimates for stars with [Fe/H]&gt;-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.
description: 9 figures; 2 tables. Submitted to ApJS. DR9 is available at http://www.sdss3.org/dr9