J/AJ/152/91ivo://CDS.VizieR/J/AJ/152/91doi:10.26093/cds/vizier.51520091CDSClem J.L.Landolt A.U.2018-09-19T07:01:13Z2016-10-27T15:43:17ZCDS support team

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

cds-question@unistra.frstandard-starsinfrared-photometryvisible-astronomyWide-band photometryccd-photometryPrecise and accurate CCD-based UBVRI photometry is presented for ~2000 stars distributed around the sky in a declination zone centered approximately at +50{deg}. Their photometry has been calibrated to the standard Johnson UBV and Kron-Cousins RI systems through observations of the UBVRI standard stars presented in the various works of Landolt. The magnitude and color range for these stars are 12<~V<~22 and -0.3<~(B-V)<~1.8, respectively. Each star averages 13 measures in each UBVRI filter from data taken on 41 different photometric nights obtained over a 21 month period. Hence, there now exists a network of faint UBVRI photometric standard stars centered on the declination zones {delta}=-50{deg}, 0{deg}, and +50{deg}.2016AJ....152...91Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/152/91CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/183 : UBVRI Photometric Standards (Landolt 1992)II/118 : UBVRI standards around Celestial Equator (Landolt 1983)J/AJ/146/131 : UBVRI standard stars at +50{deg} declination (Landolt, 2013)J/AJ/146/88 : UBVRI standard stars around the celestial equator (Clem+, 2013)J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)J/AJ/133/2502 : UBVRI Standard Stars (Landolt, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/152/91https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/152/91http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/152/91https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/152/91https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/152/91http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/152/91GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/152/91/table2 (Program fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/91/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/91/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/91/table2?GETtext/xml+votable180.050000true1.8933.3141670.005555555555555556Cone search capability for table J/AJ/152/91/table6 (UBVRI photometry and astrometry for stars in each of the 12 fields)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/91/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/91/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/91/table6?GETtext/xml+votable180.050000true1.7957533.35288890.0055555555555555566/1401 1403 1714 1720 1737 2536 2674 2675 2890 3693 5547 9589 9885 9887 10132 10599 10874 13690 13691 14023 14666 14667 14676 15034 20421 204232.367228618189496e-19 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/152/91?format=asciiInfraredOpticaldefaultJ/AJ/152/91/table2Program fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField nameobs.fieldcharNphotNumber of photometric measurements in this field (table6)meta.numberintnullableRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainNU[1/23] Number of exposures obtained in U filter (1)meta.numberintNB[1/24] Number of exposures obtained in B filter (1)meta.numberintNV[1/27] Number of exposures obtained in V filter (1)meta.numberintNR[1/24] Number of exposures obtained in R filter (1)meta.numberintNI[1/23] Number of exposures obtained in I filter (1)meta.numberintL13Indicates a pre-existing standard field defined by Landolt 2013 (Cat. J/AJ/146/131)meta.numberintnullableJ/AJ/152/91/table6UBVRI photometry and astrometry for stars in each of the 12 fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharStar[1/401] Sequential star number within Fieldmeta.id;obs.fieldintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainUmag[11.9/24] The U band magnitudemagphot.mag;em.opt.Ufloate_Umag[0.0008/0.1] Uncertainty in Umagmagstat.error;phot.mag;em.opt.Ufloato_Umag[3/23] Number of measurements in Umagmeta.numberintBmag[11.4/23.7] The B band magnitudemagphot.mag;em.opt.Bfloate_Bmag[0.0007/0.06] Uncertainty in Bmagmagstat.error;phot.mag;em.opt.Bfloato_Bmag[4/24] Number of measurements in Bmagmeta.numberintVmag[10.3/23] The V band magnitudemagphot.mag;em.opt.Vfloate_Vmag[0.0009/0.041] Uncertainty in Vmagmagstat.error;phot.mag;em.opt.Vfloato_Vmag[4/27] Number of measurements in Vmagmeta.numberintRmag[9.7/22.9] The R band magnitudemagphot.mag;em.opt.Rfloate_Rmag[0.0007/0.07] Uncertainty in Rmagmagstat.error;phot.mag;em.opt.Rfloato_Rmag[5/24] Number of measurements in Rmagmeta.numberintImag[9.1/22.9] The I band magnitudemagphot.mag;em.opt.Ifloate_Imag[0.001/0.091] Uncertainty in Imagmagstat.error;phot.mag;em.opt.Ifloato_Imag[3/23] Number of measurements in Imagmeta.numberintU-B[-1.2/3.5] The (U-B) color indexmagphot.color;em.opt.U;em.opt.Bfloate_U-B[0.0012/0.12] Uncertainty in U-B (1)magstat.error;phot.color;em.opt.UfloatB-V[-0.31/3.069] The (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloate_B-V[0.0014/0.06] Uncertainty in B-V (2)magstat.error;phot.color;em.opt.BfloatV-R[-0.15/2] The (V-R) color indexmagphot.color;em.opt.V;em.opt.Rfloate_V-R[0.001/0.071] Uncertainty in V-R (3)magstat.error;phot.color;em.opt.VfloatR-I[-0.18/1.9] The (R-I) color indexmagphot.color;em.opt.R;em.opt.Ifloate_R-I[0.001/0.1] Uncertainty in R-I (4)magstat.error;phot.color;em.opt.RfloatV-I[-0.33/3.8] The (V-I) color indexmagphot.color;em.opt.V;em.opt.Ifloate_V-I[0.001/0.095] Uncertainty in V-I (5)magstat.error;phot.color;em.opt.Vfloat