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Article
Report number astro-ph/0403325 ; FERMILAB-PUB-04-360-A
Title The Second Data Release of the Sloan Digital Sky Survey
Author(s)

Abazajian, Kevork (Los Alamos) ; Adelman-McCarthy, Jennifer K. (Fermilab) ; Agueros, Marcel A. (Washington U., Seattle, Astron. Dept.) ; Allam, Sahar S. (New Mexico State U.) ; Anderson, Kurt S.J. (New Mexico State U. ; Apache Point Observ.) ; Anderson, Scott F. (Washington U., Seattle, Astron. Dept.) ; Annis, James (Fermilab) ; Bahcall, Neta A. (Princeton U. Observ.) ; Baldry, Ivan K. (Johns Hopkins U.) ; Bastian, Steven (Fermilab) ; Berlind, Andreas (Chicago U. ; New York U., CCPP) ; Bernardi, Mariangela (Carnegie Mellon U. (main)) ; Blanton, Michael R. (New York U.) ; Bochanski, John J., Jr. (Washington U., Seattle, Astron. Dept.) ; Boroski, William N. (Fermilab) ; Briggs, John W. (Chicago U., Astron. Astrophys. Ctr.) ; Brinkmann, J. (Apache Point Observ.) ; Brunner, Robert J. (Illinois U., Urbana, Astron. Dept.) ; Budavari, Tamas (Johns Hopkins U. (main)) ; Carey, Larry N. (Washington U., Seattle) ; Carliles, Samuel (Johns Hopkins U.) ; Castander, Francisco J. (Barcelona, IEEC) ; Connolly, A.J. (U. Pittsburgh (main)) ; Csabai, Istvan (Eotvos U. ; Johns Hopkins U. (main)) ; Doi, Mamoru (Tokyo U., RESCEU ; Tokyo U., Inst. Astron.) ; Dong, Feng (Princeton U., Astrophys. Sci. Dept.) ; Eisenstein, Daniel J. (Arizona U., Astron. Dept. - Steward Observ.) ; Evans, Michael L. (Washington U., Seattle, Astron. Dept.) ; Fan, Xiaohui (Arizona U., Astron. Dept. - Steward Observ.) ; Finkbeiner, Douglas P. (Princeton U. Observ.) ; Friedman, Scott D. (Baltimore, Space Telescope Sci.) ; Frieman, Joshua A. (Chicago U., Astron. Astrophys. Ctr. ; Fermilab) ; Fukugita, Masataka (Tokyo U., ICRR) ; Gal, Roy R. (Johns Hopkins U. (main)) ; Gillespie, Bruce (Apache Point Observ.) ; Glazebrook, Karl (Johns Hopkins U. (main)) ; Gray, Jim (Microsoft, BARC) ; Grebel, Eva K. (Heidelberg, Max Planck Inst. Astron.) ; Gunn, James E. (Princeton U. Observ.) ; Gurbani, Vijay K. (Fermilab) ; Hall, Patrick B. (Princeton U. Observ.) ; Hamabe, Masaru (Japan Women's U.) ; Harris, Frederick H. (Naval Observ., Flagstaff) ; Harris, Hugh C. (Naval Observ., Flagstaff) ; Harvanek, Michael (Apache Point Observ.) ; Heckman, Timothy M. (Johns Hopkins U.) ; Hendry, John S. (Fermilab) ; Hennessy, Gregory S. (Naval Observ., Wash., D.C.) ; Hindsley, Robert B. (Naval Research Lab, Wash., D.C.) ; Hogan, Craig J. (Washington U., Seattle, Astron. Dept.) ; Hogg, David W. (New York U.) ; Holmgren, Donald J. (Fermilab) ; Ichikawa, Shin-ichi (Natl. Astron. Observ. of Japan) ; Ichikawa, Takashi (Tohoku U., Astron. Inst.) ; Ivezic, Zeljko (Princeton U. Observ.) ; Jester, Sebastian (Fermilab) ; Johnston, David E. (Chicago U. ; Princeton U., Astrophys. Sci. Dept.) ; Jorgensen, Anders M. (Los Alamos) ; Kent, Stephen M. (Fermilab) ; Kleinman, S.J. (Apache Point Observ.) ; Knapp, G.R. (Princeton U., Astrophys. Sci. Dept.) ; Kniazev, Alexei Yu. (Heidelberg, Max Planck Inst. Astron.) ; Kron, Richard G. (Chicago U. ; Fermilab) ; Krzesinski, Jurek (Apache Point Observ. ; Pedagogical U., Cracow) ; Kunszt, Peter Z. (CERN ; Johns Hopkins U. (main)) ; Kuropatkin, Nickolai (Fermilab) ; Lamb, Donald Q. (Chicago U., Astron. Astrophys. Ctr. ; Chicago U., EFI) ; Lampeitl, Hubert (Fermilab) ; Lee, Brian C. (LBL, Berkeley) ; Leger, R. French (Fermilab) ; Li, Nolan (Johns Hopkins U. (main)) ; Lin, Huan (Fermilab) ; Loh, Yeong-Shang (Colorado U. ; Princeton U., Astrophys. Sci. Dept.) ; Long, Daniel C. (Apache Point Observ.) ; Loveday, Jon (Sussex U., Astron. Ctr.) ; Lupton, Robert H. (Princeton U. Observ.) ; Malik, Tanu (Johns Hopkins U.) ; Margon, Bruce (Baltimore, Space Telescope Sci.) ; Matsubara, Takahiko (Nagoya U.) ; McGehee, Peregrine M. (New Mexico State U. ; Los Alamos) ; McKay, Timothy A. (Michigan U.) ; Meiksin, Avery (Royal Observ., Edinburgh) ; Munn, Jeffrey A. (Naval Observ., Flagstaff) ; Nakajima, Reiko (Pennsylvania U.) ; Nash, Thomas (Fermilab) ; Neilsen, Eric H., Jr. (Fermilab) ; Newberg, Heidi Jo (Rensselaer Polytech. Inst.) ; Newman, Peter R. (Apache Point Observ.) ; Nichol, Robert C. (Carnegie Mellon U.) ; Nicinski, Tom (CMC Electronics Inc. ; Fermilab) ; Nieto-Santisteban, Maria (Johns Hopkins U.) ; Nitta, Atsuko (Apache Point Observ.) ; Okamura, Sadanori (Tokyo U., RESCEU) ; O'Mullane, William (Johns Hopkins U.) ; Ostriker, Jeremiah P. (Princeton U. Observ.) ; Owen, Russell (Washington U., Seattle) ; Padmanabhan, Nikhil (Yale U.) ; Peoples, John (Fermilab) ; Pier, Jeffrey R. (Naval Observ., Flagstaff) ; Pope, Adrian C. (Johns Hopkins U.) ; Quinn, Thomas R. (Washington U., Seattle, Astron. Dept.) ; Richards, Gordon T. (Princeton U. Observ.) ; Richmond, Michael W. (Rochester Inst. Tech.) ; Rix, Hans-Walter (Heidelberg, Max Planck Inst. Astron.) ; Rockosi, Constance M. (Advanced Fuel Research, Inc.) ; Schlegel, David J. (Princeton U. Observ.) ; Schneider, Donald P. (Penn State U.) ; Scranton, Ryan (Pittsburgh U.) ; Sekiguchi, Maki (Tokyo U., ICRR) ; Seljak, Uros (Princeton U., Astrophys. Sci. Dept.) ; Sergey, Gary (Fermilab) ; Sesar, Branimir (Heidelberg, Max Planck Inst. Astron.) ; Sheldon, Erin (Chicago U., Astron. Astrophys. Ctr.) ; Shimasaku, Kazu (Tokyo U., RESCEU) ; Siegmund, Walter A. (Inst. Astron., Honolulu) ; Silvestri, Nicole M. (Washington U., Seattle, Astron. Dept.) ; Smith, J. Allyn (Wyoming U. ; Los Alamos) ; Smolcic, Vernesa (Zagreb U.) ; Snedden, Stephanie A. (Apache Point Observ.) ; Stebbins, Albert (Fermilab) ; Stoughton, Chris (Fermilab) ; Strauss, Michael A. (Princeton U. Observ.) ; SubbaRao, Mark (Adler Planetarium, Chicago ; Chicago U., Astron. Astrophys. Ctr.) ; Szalay, Alexander S. (Johns Hopkins U.) ; Szapudi, Istvan (Inst. Astron., Honolulu) ; Szkody, Paula (Washington U., Seattle, Astron. Dept.) ; Szokoly, Gyula P. (Garching, Max Planck Inst., MPE) ; Tegmark, Max (Pennsylvania U.) ; Teodoro, Luis (Los Alamos) ; Thakar, Aniruddha R. (Johns Hopkins U. (main)) ; Tremonti, Christy (Arizona U., Astron. Dept. - Steward Observ.) ; Tucker, Douglas L. (Fermilab) ; Uomoto, Alan (Johns Hopkins U. ; Carnegie Inst. Observ.) ; Vanden Berk, Daniel E. (Pittsburgh U.) ; Vandenberg, Jan (Johns Hopkins U.) ; Vogeley, Michael S. (Drexel U.) ; Voges, Wolfgang (Garching, Max Planck Inst., MPE) ; Vogt, Nicole P. (New Mexico State U.) ; M.Walkowicz, Lucianne (Washington U., Seattle, Astron. Dept.) ; Wang, Shu-i (Chicago U., Astron. Astrophys. Ctr.) ; Weinberg, David H. (Ohio State U.) ; West, Andrew A. (Washington U., Seattle, Astron. Dept.) ; White, Simon D.M. (Garching, Max Planck Inst.) ; Wilhite, Brian C. (Chicago U., Astron. Astrophys. Ctr.) ; Xu, Yongzhong (Los Alamos) ; Yanny, Brian (Fermilab) ; Yasuda, Naoki (Tokyo U., ICRR) ; Yip, Ching-Wa (Johns Hopkins U.) ; Yocum, D. R. (Fermilab) ; York, Donald G. (Chicago U., Astron. Astrophys. Ctr. ; Chicago U., EFI) ; Zehavi, Idit (Arizona U., Astron. Dept. - Steward Observ.) ; Zibetti, Stefano (Garching, Max Planck Inst.) ; Zucker, Daniel B. (Heidelberg, Max Planck Inst. Astron.)

Publication 2004
Imprint 2004
Number of pages 24
In: Astron. J. 128 (2004) 502-512
DOI 10.1086/421365
Subject category Astrophysics and Astronomy
Abstract The Sloan Digital Sky Survey has validated and made publicly available its Second Data Release. This data release consists of 3324 square degrees of five-band (u g r i z) imaging data with photometry for over 88 million unique objects, 367,360 spectra of galaxies, quasars, stars and calibrating blank sky patches selected over 2627 degrees of this area, and tables of measured parameters from these data. The imaging data reach a depth of r   22.2 (95% completeness limit for point sources) and are photometrically and astrometrically calibrated to 2% rms and 100 milli-arcsec rms per coordinate, respectively. The imaging data have all been processed through a new version of the SDSS imaging pipeline, in which the most important improvement since the last data release is fixing an error in the model fits to each object. The result is that model magnitudes are now a good proxy for point spread function (PSF) magnitudes for point sources, and Petrosian magnitudes for extended sources. The spectroscopy extends from 3800 A to 9200 A at a resolution of 2000. The spectroscopic software now repairs a systematic error in the radial velocities of certain types of stars, and has substantially improved spectrophotometry. All data included in the SDSS Early Data Release and First Data Release are reprocessed with the improved pipelines, and included in the Second Data Release. The data are publicly available as of 2004 March 15 via the web sites http://www.sdss.org/dr2 and http://skyserver.sdss.org .

Corresponding record in: Inspire


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