The Second Data Release of the Sloan Digital Sky Survey
Kevork N. Abazajian(Los Alamos National Laboratory), Jennifer Adelman-McCarthy(Fermi National Accelerator Laboratory), Marcel A. Agüeros(University of Washington), S. Allam(New Mexico State University), S. J. Anderson Kurt(New Mexico State University), Scott F. Anderson(University of Washington), James Annis(Fermi National Accelerator Laboratory), Neta A. Bahcall(Princeton University), I. K. Baldry(Johns Hopkins University), Steven Bastian(Fermi National Accelerator Laboratory), Andreas A. Berlind(University of Chicago), Mariangela Bernardi(Carnegie Mellon University), Michael R. Blanton(New York University), John J. Bochanski(University of Washington), William N. Boroski(Fermi National Accelerator Laboratory), John W. Briggs(University of Chicago), J. Brinkmann, Robert J. Brunner(University of Illinois Urbana-Champaign), Tamás Budavári(Johns Hopkins University), Larry Carey(University of Washington), Samuel Carliles(Johns Hopkins University), F. J. Castander(Institut d'Estudis Espacials de Catalunya), Andrew J. Connolly(University of Pittsburgh), István Csabai(Eötvös Loránd University), Mamoru Doi(Tokyo University of Science), Feng Dong(Princeton University), Daniel J. Eisenstein, Michael L. Evans(University of Washington), Xiaohui Fan, Douglas P. Finkbeiner(Princeton University), S. D. Friedman(Space Telescope Science Institute), Joshua A. Frieman(Fermi National Accelerator Laboratory), M. Fukugita(The University of Tokyo), R. R. Gal(Johns Hopkins University), Bruce Gillespie, Karl Glazebrook(Johns Hopkins University), Jim Gray(Microsoft (United States)), E. K. Grebel(Max Planck Institute for Astronomy), James E. Gunn(Princeton University), Vijay K. Gurbani(Fermi National Accelerator Laboratory), Patrick B. Hall(Princeton University), Masaru Hamabe(Japan Women's University), Frederick H. Harris(United States Naval Observatory), Hugh C. Harris(United States Naval Observatory), Michael Harvanek, Timothy M. Heckman(Johns Hopkins University), John S. Hendry(Fermi National Accelerator Laboratory), G. S. Hennessy(United States Naval Observatory), Robert B. Hindsley(United States Naval Research Laboratory), Craig J. Hogan(University of Washington), David W. Hogg(New York University), D. Holmgren(Fermi National Accelerator Laboratory), Shin-ichi Ichikawa(National Astronomical Observatory of Japan), Takashi Ichikawa(Tohoku University), Željko Ivezić(Princeton University), Sebastian Jester(Fermi National Accelerator Laboratory), David E. Johnston(Princeton University), A. M. Jorgensen(Los Alamos National Laboratory), S. Kent(Fermi National Accelerator Laboratory), S. J. Kleinman, G. R. Knapp(Princeton University), A. Y. Kniazev(Max Planck Institute for Astronomy), Richard G. Kron(Fermi National Accelerator Laboratory), J. Krzesiński, Peter Kunszt(Johns Hopkins University), Nickolai Kuropatkin(Fermi National Accelerator Laboratory), Donald Q. Lamb(Fermi National Accelerator Laboratory), Hubert Lampeitl(Fermi National Accelerator Laboratory), Brian Lee(Lawrence Berkeley National Laboratory), R. French Leger(Fermi National Accelerator Laboratory), Nolan Li(Johns Hopkins University), H. Lin(Fermi National Accelerator Laboratory), Y. S. Loh(University of Colorado Boulder), Daniel C. Long, J. Loveday(University of Sussex), Robert H. Lupton(Princeton University), Tanu Malik(Johns Hopkins University), B. Margon(Space Telescope Science Institute), Takahiko Matsubara(Nagoya University), P. McGehee(New Mexico State University), Timothy A. McKay(University of Michigan), Avery Meiksin(Royal Observatory), Jeffrey A. Munn(United States Naval Observatory), Reiko Nakajima(University of Pennsylvania), Thomas Nash(Fermi National Accelerator Laboratory), Eric H. Neilsen(Fermi National Accelerator Laboratory), Heidi Jo Newberg(Rensselaer Polytechnic Institute), Peter R. Newman, R. C. Nichol(Carnegie Mellon University), Tom Nicinski(Fermi National Accelerator Laboratory), M. A. Nieto‐Santisteban(Johns Hopkins University), A. Nitta, Sadanori Okamura(The University of Tokyo), William O’Mullane(Johns Hopkins University), Jeremiah P. Ostriker(Princeton University), Russell Owen(University of Washington), Nikhil Padmanabhan(Princeton University), J. Peoples(Fermi National Accelerator Laboratory), Jeffrey R. Pier(United States Naval Observatory), Adrian Pope(Johns Hopkins University), Thomas Quinn(University of Washington), Gordon T. Richards(Princeton University), M. Richmond(Rochester Institute of Technology), Hans-Walter Rix(Max Planck Institute for Astronomy), Constance M. Rockosi(University of Washington), David J. Schlegel(Princeton University), Donald P. Schneider(Pennsylvania State University), Ryan Scranton(University of Pittsburgh), M. Sekiguchi(Institute for Cosmic Ray Research), Uroš Seljak(Princeton University), G. Sergey(Fermi National Accelerator Laboratory), Branimir Sesar(University of Zagreb), E. Sheldon(University of Chicago), K. Shimasaku(The University of Tokyo), Walter A. Siegmund, Nicole M. Silvestri(University of Washington), J. A. Smith(University of Wyoming), V. Smolčić(University of Zagreb), Stephanie A. Snedden, Albert Stebbins(Fermi National Accelerator Laboratory), Chris Stoughton(Fermi National Accelerator Laboratory), Michael A. Strauss(Princeton University), Mark SubbaRao(Adler Planetarium), Alexander S. Szalay(Johns Hopkins University), István Szapudi, Paula Szkody(University of Washington), G. Szokoly(Max Planck Institute for Extraterrestrial Physics), Max Tegmark(University of Pennsylvania), L. F. A. Teodoro(Los Alamos National Laboratory), Aniruddha R. Thakar(Johns Hopkins University), Christy Tremonti, D. L. Tucker(Fermi National Accelerator Laboratory), Alan Uomoto(Johns Hopkins University), D. E. vanden Berk(University of Pittsburgh), Jan Vandenberg(Johns Hopkins University), Michael S. Vogeley(Drexel University), W. Voges(Max Planck Institute for Extraterrestrial Physics), Nicole P. Vogt(New Mexico State University), Lucianne M. Walkowicz(University of Washington), Shu-i Wang(University of Chicago), David H. Weinberg(The Ohio State University), Andrew A. West(University of Washington), Simon D. M. White(Max Planck Institute for Astrophysics), Brian C. Wilhite(University of Chicago), Yongzhong Xu(Los Alamos National Laboratory), B. Yanny(Fermi National Accelerator Laboratory), Naoki Yasuda(The University of Tokyo), C. W. Yip(University of Pittsburgh), D. R. Yocum(Fermi National Accelerator Laboratory), Donald G. York(Fermi National Accelerator Laboratory), Idit Zehavi, S. Zibetti(Max Planck Institute for Astrophysics), D. B. Zucker(Max Planck Institute for Astronomy)
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Abstract
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg² of five-band (ugriz) 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 deg² 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 mas 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 magnitudes for point sources, and Petrosian magnitudes for extended sources. The spectroscopy extends from 3800 to 9200 Å 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. Further characteristics of the data are described, as are the data products themselves and the tools for accessing them.
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