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Title:
The Seventh Data Release of the Sloan Digital Sky Survey
Authors:
Abazajian, Kevork N.; Adelman-McCarthy, Jennifer K.; Agüeros, Marcel A.; Allam, Sahar S.; Allende Prieto, Carlos; An, Deokkeun; Anderson, Kurt S. J.; Anderson, Scott F.; Annis, James; Bahcall, Neta A.; Bailer-Jones, C. A. L.; Barentine, J. C.; Bassett, Bruce A.; Becker, Andrew C.; Beers, Timothy C.; Bell, Eric F.; Belokurov, Vasily; Berlind, Andreas A.; Berman, Eileen F.; Bernardi, Mariangela; Bickerton, Steven J.; Bizyaev, Dmitry; Blakeslee, John P.; Blanton, Michael R.; Bochanski, John J.; Boroski, William N.; Brewington, Howard J.; Brinchmann, Jarle; Brinkmann, J.; Brunner, Robert J.; Budavári, Tamás; Carey, Larry N.; Carliles, Samuel; Carr, Michael A.; Castander, Francisco J.; Cinabro, David; Connolly, A. J.; Csabai, István; Cunha, Carlos E.; Czarapata, Paul C.; Davenport, James R. A.; de Haas, Ernst; Dilday, Ben; Doi, Mamoru; Eisenstein, Daniel J.; Evans, Michael L.; Evans, N. W.; Fan, Xiaohui; Friedman, Scott D.; Frieman, Joshua A.; Fukugita, Masataka; Gänsicke, Boris T.; Gates, Evalyn; Gillespie, Bruce; Gilmore, G.; Gonzalez, Belinda; Gonzalez, Carlos F.; Grebel, Eva K.; Gunn, James E.; Györy, Zsuzsanna; Hall, Patrick B.; Harding, Paul; Harris, Frederick H.; Harvanek, Michael; Hawley, Suzanne L.; Hayes, Jeffrey J. E.; Heckman, Timothy M.; Hendry, John S.; Hennessy, Gregory S.; Hindsley, Robert B.; Hoblitt, J.; Hogan, Craig J.; Hogg, David W.; Holtzman, Jon A.; Hyde, Joseph B.; Ichikawa, Shin-ichi; Ichikawa, Takashi; Im, Myungshin; Ivezić, Željko; Jester, Sebastian; Jiang, Linhua; Johnson, Jennifer A.; Jorgensen, Anders M.; Jurić, Mario; Kent, Stephen M.; Kessler, R.; Kleinman, S. J.; Knapp, G. R.; Konishi, Kohki; Kron, Richard G.; Krzesinski, Jurek; Kuropatkin, Nikolay; Lampeitl, Hubert; Lebedeva, Svetlana; Lee, Myung Gyoon; Lee, Young Sun; French Leger, R.; Lépine, Sébastien; Li, Nolan; Lima, Marcos; Lin, Huan; Long, Daniel C.; Loomis, Craig P.; Loveday, Jon; Lupton, Robert H.; Magnier, Eugene; Malanushenko, Olena; Malanushenko, Viktor; Mandelbaum, Rachel; Margon, Bruce; Marriner, John P.; Martínez-Delgado, David; Matsubara, Takahiko; McGehee, Peregrine M.; McKay, Timothy A.; Meiksin, Avery; Morrison, Heather L.; Mullally, Fergal; Munn, Jeffrey A.; Murphy, Tara; Nash, Thomas; Nebot, Ada; Neilsen, Eric H., Jr.; Newberg, Heidi Jo; Newman, Peter R.; Nichol, Robert C.; Nicinski, Tom; Nieto-Santisteban, Maria; Nitta, Atsuko; Okamura, Sadanori; Oravetz, Daniel J.; Ostriker, Jeremiah P.; Owen, Russell; Padmanabhan, Nikhil; Pan, Kaike; Park, Changbom; Pauls, George; Peoples, John, Jr.; Percival, Will J.; Pier, Jeffrey R.; Pope, Adrian C.; Pourbaix, Dimitri; Price, Paul A.; Purger, Norbert; Quinn, Thomas; Raddick, M. Jordan; Re Fiorentin, Paola; Richards, Gordon T.; Richmond, Michael W.; Riess, Adam G.; Rix, Hans-Walter; Rockosi, Constance M.; Sako, Masao; Schlegel, David J.; Schneider, Donald P.; Scholz, Ralf-Dieter; Schreiber, Matthias R.; Schwope, Axel D.; Seljak, Uroš; Sesar, Branimir; Sheldon, Erin; Shimasaku, Kazu; Sibley, Valena C.; Simmons, A. E.; Sivarani, Thirupathi; Allyn Smith, J.; Smith, Martin C.; Smolčić, Vernesa; Snedden, Stephanie A.; Stebbins, Albert; Steinmetz, Matthias; Stoughton, Chris; Strauss, Michael A.; SubbaRao, Mark; Suto, Yasushi; Szalay, Alexander S.; Szapudi, István; Szkody, Paula; Tanaka, Masayuki; Tegmark, Max; Teodoro, Luis F. A.; Thakar, Aniruddha R.; Tremonti, Christy A.; Tucker, Douglas L.; Uomoto, Alan; Vanden Berk, Daniel E.; Vandenberg, Jan; Vidrih, S.; Vogeley, Michael S.; Voges, Wolfgang; Vogt, Nicole P.; Wadadekar, Yogesh; Watters, Shannon; Weinberg, David H.; West, Andrew A.; White, Simon D. M.; Wilhite, Brian C.; Wonders, Alainna C.; Yanny, Brian; Yocum, D. R.; York, Donald G.; Zehavi, Idit; Zibetti, Stefano; Zucker, Daniel B.
Affiliation:
AA(Department of Physics, University of Maryland, College Park, MD 20742, USA), AB(Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA), AC(Columbia Astrophysics Laboratory, 550 West 120th Street, New York, NY 10027, USA ;  NSF Astronomy and Astrophysics Postdoctoral Fellow.), AD(Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA ; Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, USA), AE(Mullard Space Science Laboratory, University College London, Holmbury SL Mary, Surrey, RH5 6NT, UK), AF(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA ; IPAC, MS 220-6, California Institute of Technology, Pasadena, CA 91125, USA), AG(Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349, USA ; Department of Astronomy, MSC 4500, New Mexico State University, P.O. Box 30001, Las Cruces, NM 88003, USA), AH(Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USA), AI(Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA), AJ(Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA), AK(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AL(McDonald Observatory and Department of Astronomy, The University of Texas, 1 University Station, C1400, Austin, TX 78712-0259, USA), AM(South African Astronomical Observatory, Observatory, Cape Town, South Africa ; University of Cape Town, Rondebosch, Cape Town, South Africa), AN(Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USA), AO(Department of Physics & Astrophysics, CSCE: Center for the Study of Cosmic Evolution, and JINA: Joint Institute for Nuclear Astrophysics, Michigan State University, E. Lansing, MI 48824, USA), AP(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AQ(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK), AR(Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA), AS(Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA), AT(Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USA), AU(Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA), AV(Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349, USA), AW(Herzberg Institute of Astrophysics, National Research Council of Canada, 5071 West Saanich Road, Victoria, B. C., V9E 2E7, Canada), AX(Center for Cosmology and Particle Physics, Department of Physics, New York University, 4 Washington Place, New York, NY 10003, USA), AY(Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USA ; MIT Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Avenue, Cambridge, MA 02139, USA), AZ(Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA), BA(Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349, USA), BB(Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150-762, Porto, Portugal; Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands), BC(Apache Point Observatory, P.O. 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Box 500, Batavia, IL 60510, USA), HC(Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101, USA), HD(Department of Astronomy and Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, USA ; Department of Physics, Saint Vincent College, 300 Fraser Purchase Road, Latrobe, PA 15650, USA), HE(Center for Astrophysical Sciences, Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA), HF(Astronomisches Rechen-Institut, Zentrum für Astronomie, University of Heidelberg, Mönchhofstrasse 12-14, D-69120 Heidelberg, Germany), HG(Department of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA), HH(Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, D-85741 Garching, Germany), HI(Department of Astronomy, MSC 4500, New Mexico State University, P.O. Box 30001, Las Cruces, NM 88003, USA), HJ(Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA ; National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Post Bag 3, Ganeshkhind, Pune 411007, India), HK(Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349, USA ; Advanced Technology and Research Center, Institute for Astronomy, 34 Ohia Ku St., Pukalani, HI 96768, USA), HL(Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA), HM(MIT Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Avenue, Cambridge, MA 02139, USA), HN(Max-Planck-Institut für Astrophysik, Postfach 1, D-85748 Garching, Germany), HO(Department of Physics, Elmhurst College, 190 Prospect Ave., Elmhurst, IL 60126, USA), HP(Center for Astrophysical Sciences, Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA), HQ(Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA), HR(Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USA), HS(Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA ; Enrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA), HT(Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106, USA), HU(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), HV(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK)
Publication:
The Astrophysical Journal Supplement, Volume 182, Issue 2, article id. 543-558 (2009). (ApJS Homepage)
Publication Date:
06/2009
Origin:
IOP
Astronomy Keywords:
atlases, catalogs, surveys
DOI:
10.1088/0067-0049/182/2/543
Bibliographic Code:
2009ApJS..182..543A

Abstract

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, 2fdg5 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.

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