J/ApJ/724/799ivo://CDS.VizieR/J/ApJ/724/799doi:10.26093/cds/vizier.17240799CDSYang S.-C.Sarajedini A.Holtzman J.A.Garnett D.R.2017-06-22T14:28:14Z2012-08-27T11:42:46ZCDS support team

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

cds-question@unistra.frvariable-starshst-photometrygalaxiesWe present the results of an extensive survey of RR Lyrae (RRL) stars in three fields along the major axis of the Triangulum Galaxy (M33). From images taken with the Advanced Camera for Surveys (ACS) Wide Field Channel on board the Hubble Space Telescope through two passbands (F606W and F814W), we have identified and characterized a total of 119 RRL variables (96 RRab (RR0) and 23 RRc (RR1)) in M33. Using the properties of 83 RRL stars (65 RRab and 18 RRc) in the innermost ACS field (hereafter DISK2), we find mean periods of <P_ab_>=0.553+/-0.008(error1)+/-0.05(error2) and <P_c_>=0.325+/-0.008(error1)+/-0.05(error2), where the "error1" value represents the standard error of the mean and the "error2" value is based on the error of an individual RRL period calculated from our synthetic light curve simulations. The VI minimum-light colors of the RRab stars are used to calculate a mean line-of-sight reddening toward the DISK2 field of <E(V-I)>=0.175.2010ApJ...724..799Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/724/799CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)J/ApJS/193/26 : The M33 synoptic stellar survey. I. (Pellerin+, 2011)J/MNRAS/411/263 : JHK variable stars in M33 (Javadi+ 2011)J/ApJ/664/850 : Spitzer observations of stars in M33 (McQuinn+, 2007)J/AJ/132/1361 : RR Lyrae variables in M33 (Sarajedini+, 2006)J/MNRAS/371/1405 : Variables in M33 (Hartman+, 2006)J/MNRAS/370/1429 : V photometry of bright stars of M33 (Shporer+, 2006)J/AJ/121/870 : BVI photometry of Variables in M33 (Macri+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/724/799https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/724/799http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/724/799https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/724/799https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/724/799http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/724/799GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/724/799/m33stars (Properties of 2 anomalous Cepheid candidates and RR lyrae stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/724/799/m33stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/724/799/m33stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/724/799/m33stars?GETtext/xml+votable180.050000true23.434916730.5039750.0055555555555555566/2154 21553.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/724/799?format=asciiOpticaldefaultJ/ApJ/724/799/m33starsProperties of 2 anomalous Cepheid candidates and RR lyrae starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.main<Vmag>Mean V-band magnitudemagphot.mag;em.opt.Vfloat<V-I>Mean V-I color indexmagphot.color;em.opt.V;em.opt.IfloatPerPerioddtime.periodfloatAVV-band extinctionmagphys.absorption;em.opt.VfloatType[ab/c /d?] RR Lyrae type (only for table 3)meta.code;src.varcharField[2/4]? Disk number (only for table 3) (1)meta.idintnullable