J/AJ/136/2321ivo://CDS.VizieR/J/AJ/136/2321doi:10.26093/cds/vizier.51362321CDSHughes J.Wallerstein G.Bossi A.2018-02-12T08:45:34Z2011-08-12T10:43:06ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrystellar-populationsvisible-astronomybroad-band-photometryWe present Washington CT_1_T_2_ photometry of a field central to the Bootes I dwarf spheroidal galaxy, which was discovered as a stellar overdensity in the Sloan Digital Sky Survey (DR5). We show that the Washington filters are much more effective than the Sloan filters in separating the metal-poor turn-off stars in the dwarf galaxy from the foreground stars. We detect 165 objects in the field, and statistically determine that just over 40% of the objects are nonmembers. Our statistical analysis mostly agrees with radial velocity measurements of the brighter stars. We find that there is a distinct main-sequence turn-off and subgiant branch, where there is some evidence of a spread in chemical abundance.2008AJ....136.2321Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/136/2321CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/136/2321https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/136/2321http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/136/2321https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/136/2321https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/136/2321http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/136/2321GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/136/2321/table2 (Sample of objects in Bootes I central field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/136/2321/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/136/2321/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/136/2321/table2?GETtext/xml+votable180.050000true210.0302514.51227780.0055555555555555566/87452.285239626323992e-19 5.696014567210867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/136/2321?format=asciiOpticaldefaultJ/AJ/136/2321/table2Sample of objects in Bootes I central fieldT2magWashington T2 band magnitudemagphot.mag;em.opt.IfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqRunning identification number, <[HWB2008] NNN> in Simbadmeta.id;meta.mainintn_Seq[A-F] Star status (1)meta.notecharXpixX pixel coordinatepixpos.cartesian.xfloatYpixY pixel coordinatepixpos.cartesian.ydoubleT1magWashington T1 band magnitudemagphot.mag;em.opt.Rfloate_T1magThe 1{sigma} error in T1magmagstat.error;phot.magfloatCmagWashington C band magnitudemagphot.mag;em.opt.Ufloate_CmagThe 1{sigma} error in Cmagmagstat.error;phot.magfloate_T2magThe 1{sigma} error in T2magmagstat.error;phot.magfloatRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainRemarksAdditional information on star (1)meta.notechar