J/AJ/112/2004ivo://CDS.VizieR/J/AJ/112/2004doi:10.26093/cds/vizier.51122004CDSAlcaino G.Liller W.Alvarado F.Kravtsov V.Ipatov A.,Samus N.Smirnov O.2023-04-06T16:50:22Z1998-08-31T13:19:02ZCDS support team

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

cds-question@unistra.frccd-photometryopen-star-clustersWe present BVRI CCD photometry of 3149 stars in the SMC populous cluster Kron 3. Radial dependence of the horizontal branch morphology has been revealed. Contrary to Rich et al. (1984ApJ...286..517R), we conclude that the cluster radius is about r=6'. We estimate the cluster metallicity as [Fe/H]=-1.26 and its apparent distance modulus as (m-M)=18.75mag. Our estimate of the cluster age, based on fitting isochrones of VandenBerg & Bell (1985ApJS...58..561V) to our V-(B-V) and V-(V-R) diagrams, is about 10Gyr, the lower limit being 8Gyr; this values is greater than those derived earlier, presumably partially due to the distance modulus values used by earlier investigators being too large. Our age estimate is not far from the upper values from Righ et al. (1984ApJ...286..517R).1996AJ....112.2004Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/112/2004CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/112/2004https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/112/2004http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/112/2004https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/112/2004https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/112/2004http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/112/2004GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/112/2004/table3CCD photometry in Kron 3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqRunning numbermeta.id;meta.mainintXposx coordinate (along RA, increases to the east)pixpos.cartesian.x;instr.detdoubleYposy coordinate (along DE, increases to the north)pixpos.cartesian.y;instr.detdoubleVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V color indexmagphot.color;em.opt.B;em.opt.VfloatV-R? V-R color indexmagphot.color;em.opt.V;em.opt.RfloatnullableV-I*? V-I color indexmagphot.color;em.opt.V;em.opt.Ifloatnullable