J/A+A/561/A142ivo://CDS.VizieR/J/A+A/561/A142doi:10.26093/cds/vizier.35610142CDSTian H.J.Liu C.Hu J.Y.Xu Y.Chen X.L.2014-07-05T16:28:59Z2014-07-05T16:27:32ZCDS support team

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

cds-question@unistra.frglobular-star-clustershorizontal-branch-starsextinctionWe use 12530 photometrically-selected BHB stars from Sloan Digital Sky Survey DR7 to estimate, the total extinction of the Milky Way in high Galactic latitude, RV and AV in each line of sight. A Bayesian method is developed to estimate the reddening values in the given lines of sight. Based on the most likely values of reddening in multiple colors, we are able to derive the values of RV and AV. We select 94 zero-reddened BHB stars from 7 globular cluster as the template. The reddening in the 4 SDSS colors for the northern Galactic cap are estimated by comparing the field BHB stars with the template stars.2014A&A...561A.142Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/561/A142CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/561/A142https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/561/A142http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/561/A142https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/561/A142https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/561/A142http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/561/A142GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/561/A142/table3 (List of the 94 BHB template stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/561/A142/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/561/A142/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/561/A142/table3?GETtext/xml+votable180.050000true199.074396117.62912890.0055555555555555566/9436 10321 10336-10337 27975 27981 27984 27986 27992 31398 31416-31417https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/561/A142?format=asciiOpticaldefaultJ/A+A/561/A142/table3List of the 94 BHB template starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintobjIDObject identification from SDSS-DR7meta.id;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latdoubleu-gExtinction-corrected color index in u-g (SDSS)magphot.color;em.opt.U;em.opt.Bfloate_u-gError of color Index in u-g (SDSS)magstat.errorfloatg-rExtinction-corrected color index in g-r (SDSS)magphot.color;em.opt.B;em.opt.Rfloate_g-rError of color Index in g-r (SDSS)magstat.error;phot.color;em.opt.Bfloatr-iExtinction-corrected color index in r-i (SDSS)magphot.color;em.opt.R;em.opt.Ifloate_r-iError of color Index in r-i (SDSS)magstat.error;phot.color;em.opt.Rfloati-zExtinction-corrected color index in i-z (SDSS)magphot.color;em.opt.I;em.opt.Ifloate_i-zError of color Index in i-z (SDSS)magstat.errorfloatgID[1/7] ID of the globular cluster (1)meta.id.parentintDR7Display the SDSS-DR7 photometric data (Adelman-McCarthy et al. 2009, Cat. II/294)meta.ref.urlchar_RAPosition, from SDSS-DR7 (right ascension part)degpos.eq.ra;meta.main_DEPosition, from SDSS-DR7 (declination part)degpos.eq.dec;meta.mainJ/A+A/561/A142/table4Total extinction in each line of sightrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAdegRight ascension (J2000)degpos.eq.raDEdegDeclination (J2000)degpos.eq.decE(u-g)Reddening value in u-gmagphot.color.excessfloate_E(u-g)Measured error of reddening value in u-gmagstat.errorfloatE(g-r)Reddening value in g-rmagphot.color.excessfloate_E(g-r)Measured error of reddening value in g-rmagstat.errorfloatE(r-i)Reddening value in r-imagphot.color.excessfloate_E(r-i)Measured error of reddening value in r-imagstat.errorfloatE(i-z)Reddening value in i-zmagphot.color.excessfloate_E(i-z)Measured error of reddening value in i-zmagstat.errorfloatAVExtinction in V-bandmagphys.absorption;em.opt.Vfloate_AVMeasured error of extinction in V-bandmagstat.errorfloatRVThe total-to-selective extinction ratio (extinction parameter in the extinction law)phys.absorptionfloate_RVMeasured error of RVstat.errorfloat