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THE SEVENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY

2009; Institute of Physics; Volume: 182; Issue: 2 Linguagem: Inglês

10.1088/0067-0049/182/2/543

1538-4365

Kevork N. Abazajian, Jennifer Adelman-McCarthy, Marcel A. Agüeros, S. Allam, Carlos Allende Prieto, Deokkeun An, Kurt S. Anderson, Scott F. Anderson, James Annis, Neta A. Bahcall, C. A. L. Bailer‐Jones, John C. Barentine, Bruce A. Bassett, A. C. Becker, Timothy C. Beers, Eric F. Bell, Vasily Belokurov, Andreas A. Berlind, Eileen Berman, Mariangela Bernardi, Steven J. Bickerton, Dmitry Bizyaev, John P. Blakeslee, Michael R. Blanton, John J. Bochanski, William N. Boroski, H. Brewington, J. Brinchmann, J. Brinkmann, Robert J. Brunner, Tamás Budavári, Larry Carey, Samuel Carliles, Michael A. Carr, F. J. Castander, David Cinabro, Andrew J. Connolly, István Csabai, Carlos E. Cunha, Paul C. Czarapata, James R. A. Davenport, E. de Haas, B. Dilday, Mamoru Doi, Daniel J. Eisenstein, Michael L. Evans, N. W. Evans, Xiaohui Fan, S. D. Friedman, Joshua A. Frieman, M. Fukugita, B. T. Gänsicke, Evalyn Gates, Bruce Gillespie, G. Gilmore, B. González, Carlos Fernández Gonzalez, E. K. Grebel, James E. Gunn, Zsuzsanna Györy, Patrick B. Hall, Paul Harding, Frederick H. Harris, Michael Harvanek, Suzanne L. Hawley, J. J. E. Hayes, Timothy M. Heckman, John S. Hendry, G. S. Hennessy, Robert B. Hindsley, Joshua Hoblitt, Craig J. Hogan, David W. Hogg, Jon A. Holtzman, Joseph Hyde, Shin-ichi Ichikawa, Takashi Ichikawa, Myungshin Im, Željko Ivezić, Sebastian Jester, Linhua Jiang, Jennifer A. Johnson, A. M. Jorgensen, Mario Jurić, S. Kent, R. Keßler, S. J. Kleinman, G. R. Knapp, K. Konishi, Richard G. Kron, J. Krzesiński, N. Kuropatkin, Hubert Lampeitl, Svetlana Lebedeva, Myung Gyoon Lee, Young Sun Lee, R. French Leger, Sébastien Lépine, Nolan Li, M. Lima, H. Lin, Daniel C. Long, Craig Loomis, J. Loveday, Robert H. Lupton, E. A. Magnier, O. Malanushenko, Viktor Malanushenko, Rachel Mandelbaum, B. Margon, J. Marriner, David Martínez‐Delgado, Takahiko Matsubara, P. McGehee, Timothy A. McKay, Avery Meiksin, Heather Morrison, Susan E. Mullally, Jeffrey A. Munn, Tara Murphy, Thomas Nash, A. Nebot Gómez-Morán, Eric H. Neilsen, Heidi Jo Newberg, Peter R. Newman, Robert C. Nichol, Tom Nicinski, M. A. Nieto‐Santisteban, A. Nitta, Sadanori Okamura, Daniel Oravetz, Jeremiah P. Ostriker, Russell Owen, Nikhil Padmanabhan, Kaike Pan, Changbom Park, George Pauls, J. Peoples, Will J. Percival, Jeffrey R. Pier, Adrian Pope, D. Pourbaix, P. A. Price, Norbert Purger, Thomas Quinn, M. Jordan Raddick, P. Re Fiorentin, Gordon T. Richards, M. Richmond, Adam G. Riess, Hans‐Walter Rix, Constance M. Rockosi, Masao Sako, David J. Schlegel, Donald P. Schneider, Ralf-Dieter Scholz, M. R. Schreiber, A. Schwope, Uroš Seljak, Branimir Sesar, E. S. Sheldon, K. Shimasaku, Valena C. Sibley, Audrey Simmons, T. Sivarani, J. A. Smith, M. C. Smith, V. Smolčić, Stephanie A. Snedden, Albert Stebbins, Matthias Steinmetz, Chris Stoughton, Michael A. Strauss, Mark SubbaRao, Yasushi Suto, Alexander S. Szalay, István Szapudi, Paula Szkody, Masayuki Tanaka, Max Tegmark, L. F. A. Teodoro, Aniruddha R. Thakar, Christy Tremonti, D. L. Tucker, Alan Uomoto, D. E. vanden Berk, Jan Vandenberg, S. Vidrih, Michael S. Vogeley, W. Voges, Nicole P. Vogt, Yogesh Wadadekar, S. Watters, David H. Weinberg, Andrew A. West, Simon D. M. White, Brian C. Wilhite, Alainna C. Wonders, B. Yanny, D. R. Yocum, Donald G. York, Idit Zehavi, S. Zibetti, D. B. Zucker,

Astronomy and Astrophysical Research

This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes 11,663 deg2 of imaging data, with most of the ∼2000 deg2 increment over the previous data release lying in regions of low Galactic latitude. The catalog contains five-band photometry for 357 million distinct objects. The survey also includes repeat photometry on a 120° long, 25 wide stripe along the celestial equator in the Southern Galactic Cap, with some regions covered by as many as 90 individual imaging runs. We include a co-addition of the best of these data, going roughly 2 mag fainter than the main survey over 250 deg2. The survey has completed spectroscopy over 9380 deg2; the spectroscopy is now complete over a large contiguous area of the Northern Galactic Cap, closing the gap that was present in previous data releases. There are over 1.6 million spectra in total, including 930,000 galaxies, 120,000 quasars, and 460,000 stars. The data release includes improved stellar photometry at low Galactic latitude. The astrometry has all been recalibrated with the second version of the USNO CCD Astrograph Catalog, reducing the rms statistical errors at the bright end to 45 milliarcseconds per coordinate. We further quantify a systematic error in bright galaxy photometry due to poor sky determination; this problem is less severe than previously reported for the majority of galaxies. Finally, we describe a series of improvements to the spectroscopic reductions, including better flat fielding and improved wavelength calibration at the blue end, better processing of objects with extremely strong narrow emission lines, and an improved determination of stellar metallicities.