J/AJ/127/861ivo://CDS.VizieR/J/AJ/127/861doi:10.26093/cds/vizier.51270861CDSBonanos A.Z.Stanek K.Z.Szentgyorgyi A.H.Sasselov D.D.Bakos G.A.2023-04-06T16:51:06Z2004-12-10T21:02:39ZCDS support team

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

cds-question@unistra.frvariable-starsccd-photometryWe present the first CCD variability study of the Draco dwarf spheroidal galaxy. The data were obtained with the Fred Lawrence Whipple Observatory 1.2m telescope on Mount Hopkins, Arizona, between 1998 August 19 and 1999 June 20, over 22 nights, over a period of 10 months, covering a 22'x22' field centered at {alpha}=17h19m57.5s, {delta}=57{deg}50'05" (J2000.0). The analysis of the BVI images produced 163 variable stars, 146 of which were RR Lyrae: 123 RRab, 16 RRc, 6 RRd, and one RR12. The other variables include a SX Phe star, four anomalous Cepheids, and a field eclipsing binary. Using the short distance scale statistical parallax calibration of Gould & Popowski (1998ApJ...508..844G) and 94 RRab stars from our field, we obtain a distance modulus of (m-M)_0_=19.40+/-0.02(stat)+/-0.15(syst)mag for Draco, corresponding to a distance of 75.8+/-0.7(stat)+/-5.4(syst)kpc. By comparing the spread in magnitudes of RRab stars in B, V, and I, we find no evidence for internal dust in the Draco dwarf spheroidal galaxy. The catalog of all variables, as well as their photometry and finding charts, is available electronically via anonymous ftp and the World Wide Web. The complete set of the CCD frames is available upon request.2004AJ....127..861Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/127/861CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/110/2131 : M/L for Draco and UMi. I. (Armandroff+ 1995)J/AJ/121/841 : RV photometry of Draco dwarf spheroidal galaxy (Piatek+, 2001)J/AJ/123/2511 : RV photometry of Draco dwarf spheroidal galaxy (Piatek+, 2002)J/AJ/124/3222 : VI photometry of Draco and UMi galaxies (Bellazzini+, 2002)J/AJ/127/861 : RR Lyrae in Draco dSph (Bonanos+, 2004)J/ApJS/145/245 : SDSS stars in Draco dwarf spheroidal galaxy (Rave+, 2003)J/MNRAS/330/792 : Radial velocity in Draco (Kleyna+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/127/861https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/127/861http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/127/861https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/127/861https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/127/861http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/127/861GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/127/861/table1 (RR Lyrae Stars in the Draco Dwarf, data from erratum, 2008, AJ, 136, 896)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/127/861/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/127/861/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/127/861/table1?GETtext/xml+votable180.050000true260.21666757.9256670.0055555555555555566/101832.367228618189496e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/127/861?format=asciiOpticaldefaultJ/AJ/127/861/table1RR Lyrae Stars in the Draco Dwarf, data from erratum, 2008, AJ, 136, 896Per? Perioddtime.perioddoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameVariable name (JHHMMSS.s+DDMMSS.s) (1)meta.id;meta.maincharn_Per[*d] Flag on Per (2)meta.notecharPer2? Second period valuedtime.periodfloatnullablePer3? Third period valuedtime.periodfloatnullableVmag? Intensity-averaged V-band magnitudemagphot.mag;em.opt.VfloatnullableImag? Intensity-averaged I-band magnitudemagphot.mag;em.opt.IfloatnullableBmag? Intensity-averaged B-band magnitudemagphot.mag;em.opt.BfloatnullableAmpV? The V-band amplitudemagphot.mag;em.opt.VfloatnullableTypeVariable typemeta.code;src.varcharBASV? Name given in Baade & Swope (1961AJ.....66..300B)meta.id.crossintnullableComAdditional commentsmeta.notechar_RAPosition (derived from the name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from the name) (declination part)degpos.eq.dec;meta.main