J/AJ/134/973ivo://CDS.VizieR/J/AJ/134/973doi:10.26093/cds/vizier.51340973CDSIvezic Z.Smith J.A.Miknaitis G.Lin H.Tucker D.Lupton R.H.,Gunn J.E.Knapp G.R.Strauss M.A.Sesar B.Doi M.Tanaka M.,Fukugita M.Holtzman J.Kent S.Yanny B.Schlegel D.Finkbeiner D.,Padmanabhan N.Rockosi C.M.Juric M.Bond N.Lee B.Stoughton C.,Jester S.Harris H.Harding P.Morrison H.Brinkmann J.,Schneider D.P.York D.2018-02-12T08:45:34Z2015-06-23T15:25:29ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvisible-astronomysloan-photometryvariable-starsquasarssurveysWe describe a standard star catalog constructed using multiple SDSS photometric observations (at least four per band, with a median of 10) in the ugriz system. The catalog includes 1.01 million nonvariable unresolved objects from the equatorial stripe 82 (|{delta}_J2000.0_|<1.266{deg}) in the right ascension range 20^h^34^m^-4^h^00^m^ and with the corresponding r-band (approximately Johnson V-band) magnitudes in the range 14-22. The distributions of measurements for individual sources demonstrate that the photometric pipeline correctly estimates random photometric errors, which are below 0.01mag for stars brighter than 19.5, 20.5, 20.5, 20, and 18.5 in ugriz, respectively (about twice as good as for individual SDSS runs). Several independent tests of the internal consistency suggest that the spatial variation of photometric zero points is not larger than ~0.01mag (rms). In addition to being the largest available data set with optical photometry internally consistent at the ~1% level, this catalog provides a practical definition of the SDSS photometric system. Using this catalog, we show that photometric zero points for SDSS observing runs can be calibrated within a nominal uncertainty of 2% even for data obtained through 1mag thick clouds, and we demonstrate the existence of He and H white dwarf sequences using photometric data alone. Based on the properties of this catalog, we conclude that upcoming large-scale optical surveys such as the Large Synoptic Survey Telescope will be capable of delivering robust 1% photometry for billions of sources.2007AJ....134..973Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/134/973CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)V/141 : Light-Motion Curve Catalogue (LMCC) in Stripe 82 (Bramich+ 2008)J/ApJ/798/122 : Abundances from SEGUE (Miller+, 2015)J/ApJS/210/22 : Herschel Stripe 82 survey (HerS) first cat. (Viero+, 2014)J/MNRAS/441/1802 : Low-redshift QSOs in SDSS Stripe 82 (Karhunen+, 2014)J/MNRAS/439/1212 : Deep 20GHz survey of CDFS & SDSS Stripe 82 (Franzen+, 2014)J/MNRAS/436/3581 : X-ray observations of Stripe 82 (LaMassa+, 2013)J/ApJ/731/17 : Low-mass star variability in SDSS Stripe 82 (Becker+, 2011)J/A+A/525/A37 : QSO variability indexes in SDSS Stripe 82 (Meusinger+, 2011)J/ApJS/186/233 : Variable point sources in SDSS stripe 82. I. (Bhatti+, 2010)J/AJ/131/1184 : Recalibration of optical photometry (Maiz-Apellaniz+, 2006)http://www.sdss.org/ : SDSS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/134/973https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/134/973http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/134/973https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/134/973https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/134/973http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/134/973GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/134/973/stdcat (*SDSS Stripe 82 Standard Star Catalog (v2.6))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/134/973/stdcat?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/134/973/stdcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/134/973/stdcat?GETtext/xml+votable180.050000true308.50021361-1.227721110.005555555555555556Cone search capability for table J/AJ/134/973/varcat (Master SDSS Stripe 82 Variable Source Catalog (v1.1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/134/973/varcat?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/134/973/varcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/134/973/varcat?GETtext/xml+votable180.050000true2.50123694-0.150518060.0055555555555555564/1109 1110 1113 1114 1125 1126 1129 1130 1173 1174 1177 1178 1189 1190 1193 1194 1446 1449 1450 1877 1878 1881 5/0 3072 4351 4415 4431 4435 4444 4451 4460 4464 4495 4499 4508 4515 4524 4528 4544 4671 4687 4691 4700 4707 4716 4720 4751 4755 4764 4771 4780 4784 4800 4864 5775 5795 5804 5808 7503 7507 7516 7523 7532 7536 9215 12287 6/4 8 12292 12296 17399 17403 17655 17659 17719 17723 17735 17739 17780 17784 17799 17803 17844 17848 17860 17864 17975 17979 17991 17995 18036 18040 18055 18059 18100 18104 18116 18120 18180 18184 18679 18683 18743 18747 18759 18763 18804 18808 18823 18827 18868 18872 18884 18888 18999 19003 19015 19019 19060 19064 19079 19083 19124 19128 19140 19144 19204 19208 19460 19464 23095 23099 23118 23119 23152 23154 23175 23179 23220 23224 23236 23240 30007 30011 30023 30027 30068 30072 30087 30116 30117 30119 30125 30132 30148 30152 36855 36859 49143 491472.85864675833786e-19 3.5010283109654867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/134/973?format=asciiOpticaldefaultJ/AJ/134/973/stdcat*SDSS Stripe 82 Standard Star Catalog (v2.6)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainindexede_RAJ2000[0/0.5] Right ascension rms (1)arcsecstat.error;pos.eq.rafloatDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainindexede_DEJ2000[0/0.8] Declination rms (1)arcsecstat.error;pos.eq.decfloatNep[4/29] Total number of epochsmeta.numberintAr[0.03/1.7] ISM extinction value in the r band (2)magphys.absorptionfloatNu[0/28] Total number of observations in u bandmeta.numberintumed[-0.4/27.6] Median u magnitudemagphot.mag;em.opt.Ufloatnullableumag[-0.4/27.9] Mean u-band magnitudemagphot.mag;em.opt.Ufloatnullablee_umag[0/0.3] Standard error on umag (3)magstat.error;phot.mag;em.opt.Ufloatnullables_umag[0/4] u-band root-mean-square scattermagstat.error;phot.mag;em.opt.Ufloatnullableuchi2[0/442] chi2 per degree of freedom (computed using the mean u-band magnitude)stat.fit.chi2floatnullableNg[4/28] Total number of observations in g bandmeta.numberintgmed[13.76/23.78] Median g magnitudemagphot.mag;em.opt.Bfloatgmag[13.76/23.73] Mean g-band magnitudemagphot.mag;em.opt.Bfloate_gmag[0.002/0.2] Standard error on gmag (3)magstat.error;phot.mag;em.opt.Bfloats_gmag[0/0.5] g-band root-mean-square scattermagstat.error;phot.magfloatgchi2[0/3] chi2 per degree of freedom (computed using the mean g-band magnitude)stat.fit.chi2floatNr[4/28] Total number of observations in r bandmeta.numberintrmed[13.4/21.9] Median r magnitudemagphot.mag;em.opt.Rfloatrmag[13.4/21.87] Mean r-band magnitudemagphot.mag;em.opt.Rfloate_rmag[0.002/0.05] Standard error on rmag (3)magstat.error;phot.mag;em.opt.Rfloats_rmag[0/0.4] r-band root-mean-square scattermagstat.error;phot.magfloatrchi2[0/3] chi2 per degree of freedom (computed using the mean r-band magnitude)stat.fit.chi2floatNi[4/28] Total number of observations in i bandmeta.numberintimed[13.27/22.18] Median i magnitudemagphot.mag;em.opt.Ifloatimag[13.27/22.15] Mean i-band magnitudemagphot.mag;em.opt.Ifloate_imag[0.002/0.2] Standard error on imag (3)magstat.error;phot.mag;em.opt.Ifloats_imag[0.001/0.5] i-band root-mean-square scattermagstat.error;phot.magfloatichi2[0/3] chi2 per degree of freedom (computed using the mean i-band magnitude)stat.fit.chi2floatNz[0/28] Total number of observations in z bandmeta.numberintzmed[-0.03/21.8] Median z magnitudemagphot.mag;em.opt.Ifloatnullablezmag[-0.03/21.9] Mean z-band magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0/0.3] Standard error on zmag (3)magstat.error;phot.mag;em.opt.Ifloatnullables_zmag[0/1.2] z-band root-mean-square scattermagstat.error;phot.magfloatnullablezchi2[0/2088] chi2 per degree of freedom (computed using the mean z-band magnitude)stat.fit.chi2floatnullableSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharJ/AJ/134/973/varcatMaster SDSS Stripe 82 Variable Source Catalog (v1.1)LCLight curvesmeta.ref.urlcharNr[10/152] Number of data points in the r bandmeta.numberintPer[0.2/17518.1] Period (1)dtime.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[74/7913299] Identifier (used for light curves identification)meta.id;meta.mainintRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainindexedrmag[12.6/21.2] SDSS r band magnitude (2)magphot.mag;em.opt.Rfloatu-g[-30.3/7.8] SDSS (u-g) color index (2)magphot.color;em.opt.U;em.opt.Bfloatnullableg-r[-1.3/3.22] SDSS (g-r) color index (2)magphot.color;em.opt.B;em.opt.Rfloatr-i[-2.6/29.2] SDSS (r-i) color index (2)magphot.color;em.opt.R;em.opt.Ifloatnullablei-z[-29/30] SDSS (i-z) color index (2)magphot.color;em.opt.I;em.opt.IfloatnullableNg[10/145] Number of data points in the g bandmeta.numberintgAmp[0.01/8] Amplitude (max-min) in the g bandmagsrc.var.amplitudefloatrAmp[0.01/5.8] Amplitude (max-min) in the r bandmagsrc.var.amplitudefloatNi[0/154] Number of data points in the i bandmeta.numberintiAmp[-2.1/8.7] Amplitude (max-min) in the i band (3)magsrc.var.amplitudefloatnullablezQSO[0.08/4.1]? Redshift if spectroscopically confirmed SDSS quasarsrc.redshift;pos.heliocentricfloatnullableiMag[-29.4/-22]? Absolute magnitude in the i band if quasarmagphys.magAbsfloatnullable