CCD photometry of NGC 2257 RR LyraeJ/AJ/98/2086ivo://CDS.VizieR/J/AJ/98/2086doi:10.26093/cds/vizier.50982086CDSWalker A.R.2017-06-20T13:16:32Z2008-10-24T06:29:23ZCDS support team
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
cds-question@unistra.frvariable-starsccd-photometryB and V band CCD photometry is used to study 33 cluster and nine field RR Lyrae variables near the LMC cluster, NGC 2257. It is found that the mean magnitudes for the two groups differ by 0.17 mag. The cluster and field variables both have an Fe/H abundance ratio of -1.8+/-0.1. The results are compared used to compare NGC 2257 with galactic globular clusters, showing that NGC 2257 is indistinguishable from its local counterparts.1989AJ.....98.2086Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/98/2086CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/98/2086https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/98/2086http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/98/2086https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/98/2086https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/98/2086http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/98/2086GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/98/2086/table6 (Photometry for the NGC 2257 non-variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/98/2086/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/98/2086/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/98/2086/table6?GETtext/xml+votable180.050000true97.4943547-64.35188810.005555555555555556Cone search capability for table J/AJ/98/2086/variables (Variables in the field of NGC 2257)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/98/2086/variables?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/98/2086/variables?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/98/2086/variables?GETtext/xml+votable180.050000true97.5645833-64.31258330.0055555555555555566/37550 37551 38916https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/98/2086?format=asciiOpticaldefaultJ/AJ/98/2086/table6Photometry for the NGC 2257 non-variablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStar sequential numbermeta.recordintXoffX offset from star 78 (Alcaino I) (+=West) (1)arcsecpos.cartesian.x;instr.detfloatYoffY offset from star 78 (Alcaino I) (+=North) (1)arcsecpos.cartesian.y;instr.detfloatVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.Vfloat_RAPosition computed from a comparison with catalog II/246 ({sigma}=0.48'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with catalog II/246 ({sigma}=0.48'') (declination part)degpos.eq.dec;meta.main
J/AJ/98/2086/variablesVariables in the field of NGC 2257u_<B>-<V>Uncertainty flag on <Bmag>-<Vmag>meta.code.error;pos.cartesian.ycharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar number (1)meta.id;meta.maincharPerPeriod (1)dtime.perioddoubleTypeVariable typemeta.code;src.varchar<Vmag>? Intensity mean V magnitudemagphot.mag;em.opt.Vfloatnullableu_<Vmag>Uncertainty flag on <Vmag>meta.code.error;pos.cartesian.ychar<Bmag>? Intensity mean B magnitudemagphot.mag;em.opt.Bfloatnullableu_<Bmag>Uncertainty flag on <Bmag>meta.code.errorchar<B>-<V>? <Bmag> minus <Vmag>magphot.color;em.opt.B;em.opt.Vfloatnullable<B-V>? B-V magnitude meanmagphot.color;em.opt.B;em.opt.Vfloatnullableu_<B-V>Uncertainty flag on <B-V>meta.code.error;phot.color;em.opt.BcharAV? V amplitudemagsrc.var.amplitude;em.opt.Vfloatnullableu_AVUncertainty flag on AVmeta.code.errorcharAB? B amplitudemagsrc.var.amplitude;em.opt.Bfloatnullableu_ABUncertainty flag on ABmeta.code.errorcharRise? Rise time to maximum (in phase units)phot.flux;arith.ratiofloatnullableu_RiseUncertainty flag on Risemeta.code.errorcharPhase? Phase at the maximum lighttime.phasefloatnullableSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main