Bibcode
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 et al.
Bibliographical reference
The Astrophysical Journal Supplement, Volume 182, Issue 2, article id. 543-558 (2009).
Advertised on:
6
2009
Citations
1000
Refereed citations
939
Description
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.