J/other/RMxAA/55ivo://CDS.VizieR/J/other/RMxAA/55.337CDSArellano Ferro A.Bustos Fierro I.H.Calderon J.H.Ahumada J.A.2021-10-18T12:21:07Z2019-10-10T08:13:05ZCDS support team

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

cds-question@unistra.frglobular-star-clustersvariable-starsccd-photometryTime-series VI CCD photometry of the globular cluster NGC 1261 is employed to study its variable star population. A membership analysis of most variables based on Gaia DR2 proper motions and colours was performed prior to the estimation of the mean cluster distance and metallicity. The light curves of the member RR Lyrae were Fourier decomposed to calculate their individual values of distance, [Fe/H], radius and mass. The I-band P-L for RR Lyrae stars was also employed. Our best estimates of the metallicity and distance of this Oo I cluster are [Fe/H]_ZW_=-1.42+/-0.05dex and d=17.2+/-0.4kpc. No mixture of fundamental and first overtone RR Lyrae stars in the either-or or bimodal region is seen in this cluster, as it seems to be the rule for Oo I clusters with a red horizontal branch. A multi-approach search in a region of about 10x10 arcmin^2^ around the cluster revealed no new variable stars within the limitations of our CCD photometry.2019RMxAA..55..337Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RMxAA/55.337CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/264/273 : CCD photometry of NGC 1261 (Ferraro+ 1993)J/A+A/516/A23 : UBVI Photometry of NGC 1261 (Kravtsov+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RMxAA/55.337https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RMxAA/55.337http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RMxAA/55.337https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RMxAA/55.337https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RMxAA/55.337http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RMxAA/55.337GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RMxAA/55.337/table3 (*Data of variable stars in NGC 1261 in the FoV of our images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RMxAA/55.337/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RMxAA/55.337/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RMxAA/55.337/table3?GETtext/xml+votable180.050000true48.047-55.20611110.0055555555555555566/33634-33635https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RMxAA/55.337?format=asciidefaultJ/other/RMxAA/55.337/table3*Data of variable stars in NGC 1261 in the FoV of our imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLClight curvemeta.ref.urlcharVNameVariable name, VNNmeta.id;meta.maincharf_VName[1] 1: Star not resolved in our imagesmeta.codecharn_VName[Bl ] Bl: RR Lyrae with Blazhko effectmeta.notecharTypeVariable typemeta.code;src.varchar<Vmag>? Mean V magnitudemagphot.mag;em.opt.Vfloatnullable<Imag>? Mean I magnitudemagphot.mag;em.opt.IfloatnullableAV? Absorption in V bandmagphys.absorption;em.opt.VfloatnullableAI? Absorption in I bandmagphys.absorption;em.opt.IfloatnullablePer? Perioddtime.perioddoublenullableHJDmax? Time of maximum (HJD-2450000)dtime.epochdoublenullableRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainGaiaDR2Gaia DR2 source numbermeta.idSimbadSimbad column added by the CDSmeta.ref.urlcharJ/other/RMxAA/55.337/table2VI photometry of 24 RR Lyrae, SX Phe and SR variables in NGC 1261recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVNameVariable name, VNNmeta.id;meta.maincharFilter[VI] Observation filterobs.param;obscharHJDHeliocentric Julian datedtime.epochdoubleindexedmagstStandard magnitudemagphot.magfloatmaginstInstrumental magnitudemagphot.magfloate_maginstError on the magnitudemagstat.errorfloat