The sixth data release of the Sloan digital sky survey

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dc.contributor.authorAdelman‐McCarthy, Jennifer K
dc.contributor.authorAgYeros, Marcel A
dc.contributor.authorAllam, Sahar S
dc.contributor.authorAllende Prieto, Carlos
dc.contributor.authorAnderson, Kurt S J
dc.contributor.authorAnderson, Scott F
dc.contributor.authorAnnis, James
dc.contributor.authorBahcall, Neta A
dc.contributor.authorBailer‐Jones, C A L
dc.contributor.authorBaldry, Ivan K
dc.contributor.authorBarentine, J C
dc.contributor.authorBassett, Bruce A
dc.contributor.authorBecker, Andrew C
dc.contributor.authorBeers, Timothy C
dc.contributor.authorBell, Eric F
dc.contributor.authorBerlind, Andreas A
dc.contributor.authorBernardi, Mariangela
dc.contributor.authorBlanton, Michael R
dc.contributor.authorBochanski, John J
dc.contributor.authorBoroski, William N
dc.contributor.authorBrinchmann, Jarle
dc.contributor.authorBrinkmann, J
dc.contributor.authorBrunner, Robert J
dc.contributor.authorBudavári, Tamás
dc.contributor.authorCarliles, Samuel
dc.contributor.authorCarr, Michael A
dc.contributor.authorCastander, Francisco J
dc.contributor.authorCinabro, David
dc.contributor.authorCool, R J
dc.contributor.authorCovey, Kevin R
dc.contributor.authorCsabai, István
dc.contributor.authorCunha, Carlos E
dc.date.accessioned2021-10-08T07:20:41Z
dc.date.available2021-10-08T07:20:41Z
dc.date.issued2008
dc.description.abstractThis paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and parameters of roughly 287 million objects over 9583 deg2 , including scans over a large range of Galactic latitudes and longitudes. The survey also includes 1.27 million spectra of stars, galaxies, quasars, and blank sky (for sky subtraction) selected over 7425 deg2 . This release includes much more stellar spectroscopy than was available in previous data releases and also includes detailed estimates of stellar temperatures, gravities, and metallicities. The results of improved photometric calibration are now available, with uncertainties of roughly 1% in g, r, i, and z, and 2% in u, substantially better than the uncertainties in previous data releases. The spectra in this data release have improved wavelength and flux calibration, especially in the extreme blue and extreme red, leading to the qualitatively better determination of stellar types and radial velocities. The spectrophotometric fluxes are now tied to point-spread function magnitudes of stars rather than fiber magnitudes. This gives more robust results in the presence of seeing variations, but also implies a change in the spectrophotometric scale, which is now brighter by roughly 0.35 mag. Systematic errors in the velocity dispersions of galaxies have been fixed, and the results of two independent codes for determining spectral classifications and redshifts are made available. Additional spectral outputs are made available, including calibrated spectra from individual 15 minute exposures and the sky spectrum subtracted from each exposure. We also quantify a recently recognized underestimation of the brightnesses of galaxies of large angular extent due to poor sky subtraction; the bias can exceed 0.2 mag for galaxies brighter than r ¼ 14 mag.
dc.identifier.apacitation, AgYeros, M. A., Allam, S. S., Allende Prieto, C., Anderson, K. S. J., Anderson, S. F., ... Cunha, C. E. (2008). The sixth data release of the Sloan digital sky survey. <i>The Astrophysical Journal, Supplement Series</i>, 175(2), 297 - 313. http://hdl.handle.net/11427/34983en_ZA
dc.identifier.chicagocitation, Marcel A AgYeros, Sahar S Allam, Carlos Allende Prieto, Kurt S J Anderson, Scott F Anderson, James Annis, et al "The sixth data release of the Sloan digital sky survey." <i>The Astrophysical Journal, Supplement Series</i> 175, 2. (2008): 297 - 313. http://hdl.handle.net/11427/34983en_ZA
dc.identifier.citation, AgYeros, M.A., Allam, S.S., Allende Prieto, C., Anderson, K.S.J., Anderson, S.F., Annis, J. & Bahcall, N.A. et al. 2008. The sixth data release of the Sloan digital sky survey. <i>The Astrophysical Journal, Supplement Series.</i> 175(2):297 - 313. http://hdl.handle.net/11427/34983en_ZA
dc.identifier.issn0067-0049
dc.identifier.issn0093-187X
dc.identifier.issn1538-4365
dc.identifier.ris TY - Journal Article AU - Adelman‐McCarthy, Jennifer K AU - AgYeros, Marcel A AU - Allam, Sahar S AU - Allende Prieto, Carlos AU - Anderson, Kurt S J AU - Anderson, Scott F AU - Annis, James AU - Bahcall, Neta A AU - Bailer‐Jones, C A L AU - Baldry, Ivan K AU - Barentine, J C AU - Bassett, Bruce A AU - Becker, Andrew C AU - Beers, Timothy C AU - Bell, Eric F AU - Berlind, Andreas A AU - Bernardi, Mariangela AU - Blanton, Michael R AU - Bochanski, John J AU - Boroski, William N AU - Brinchmann, Jarle AU - Brinkmann, J AU - Brunner, Robert J AU - Budavári, Tamás AU - Carliles, Samuel AU - Carr, Michael A AU - Castander, Francisco J AU - Cinabro, David AU - Cool, R J AU - Covey, Kevin R AU - Csabai, István AU - Cunha, Carlos E AB - This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and parameters of roughly 287 million objects over 9583 deg2 , including scans over a large range of Galactic latitudes and longitudes. The survey also includes 1.27 million spectra of stars, galaxies, quasars, and blank sky (for sky subtraction) selected over 7425 deg2 . This release includes much more stellar spectroscopy than was available in previous data releases and also includes detailed estimates of stellar temperatures, gravities, and metallicities. The results of improved photometric calibration are now available, with uncertainties of roughly 1% in g, r, i, and z, and 2% in u, substantially better than the uncertainties in previous data releases. The spectra in this data release have improved wavelength and flux calibration, especially in the extreme blue and extreme red, leading to the qualitatively better determination of stellar types and radial velocities. The spectrophotometric fluxes are now tied to point-spread function magnitudes of stars rather than fiber magnitudes. This gives more robust results in the presence of seeing variations, but also implies a change in the spectrophotometric scale, which is now brighter by roughly 0.35 mag. Systematic errors in the velocity dispersions of galaxies have been fixed, and the results of two independent codes for determining spectral classifications and redshifts are made available. Additional spectral outputs are made available, including calibrated spectra from individual 15 minute exposures and the sky spectrum subtracted from each exposure. We also quantify a recently recognized underestimation of the brightnesses of galaxies of large angular extent due to poor sky subtraction; the bias can exceed 0.2 mag for galaxies brighter than r ¼ 14 mag. DA - 2008 DB - OpenUCT DP - University of Cape Town IS - 2 J1 - The Astrophysical Journal, Supplement Series LK - https://open.uct.ac.za PY - 2008 SM - 0067-0049 SM - 0093-187X SM - 1538-4365 T1 - The sixth data release of the Sloan digital sky survey TI - The sixth data release of the Sloan digital sky survey UR - http://hdl.handle.net/11427/34983 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34983
dc.identifier.vancouvercitation, AgYeros MA, Allam SS, Allende Prieto C, Anderson KSJ, Anderson SF, et al. The sixth data release of the Sloan digital sky survey. The Astrophysical Journal, Supplement Series. 2008;175(2):297 - 313. http://hdl.handle.net/11427/34983.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Astronomy
dc.publisher.facultyFaculty of Science
dc.sourceThe Astrophysical Journal, Supplement Series
dc.source.journalissue2
dc.source.journalvolume175
dc.source.pagination297 - 313
dc.source.urihttps://dx.doi.org/10.1086/524984
dc.subject.otheratlases
dc.subject.othercatalogs
dc.subject.othersurveys
dc.subject.otherearly-type galaxies
dc.subject.otherspectroscopic target selection
dc.subject.othersurvey photometric
dc.subject.othersystem
dc.subject.otherhorizontal-branch stars
dc.subject.othersurvey imaging data
dc.subject.other1st data release
dc.subject.otherwhite-dwarfs
dc.subject.otherstellar spectra
dc.subject.othergalactic halo
dc.subject.othersample selection
dc.subject.otherastronomy &
dc.subject.otherastrophysics
dc.subject.otherArticle
dc.titleThe sixth data release of the Sloan digital sky survey
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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