J/ApJS/122/431ivo://CDS.VizieR/J/ApJS/122/431doi:10.26093/cds/vizier.21220431CDSChandar R.Bianchi L.Ford H. C.2010-01-22T13:44:12Z2010-01-22T14:36:08ZCDS support team

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

cds-question@unistra.frglobular-star-clustersopen-star-clustersgalaxiesvisible-astronomybroad-band-photometryultraviolet-photometryIn this paper we present the discovery of 60 star clusters in 20 multiband Hubble Space Telescope (HST) WFPC2 fields in M33. The fields sample a variety of environments, from outer regions to spiral arms and central regions, as well as a range of galactocentric distances. The HST spatial resolution allowed us to penetrate the crowded, spiral arm regions of M33 yielding the first unbiased, representative sample of star clusters for this galaxy. We discuss the separation of clusters from stellar sources, and from other extended sources such as star-forming regions, H II regions, and supernova remnants. For the clusters we present multiband images and discuss morphology, location, and integrated photometry. Measured cluster colors and magnitudes are presented. The cluster density in our sample as a function of galactocentric distance yields an estimate of 690 total clusters in M33.1999ApJS..122..431Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/122/431CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AcA/48/455 : M31 + M33 globular clusters photometry (Mochejska+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/122/431https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/122/431http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/122/431https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/122/431https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/122/431http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/122/431GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/122/431/table2 (The M33 cluster sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/122/431/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/122/431/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/122/431/table2?GETtext/xml+votable180.050000true23.43230.682494440.005555555555555556HST6/2154 2155https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/122/431?format=asciiUVOpticaldefaultJ/ApJS/122/431/table2The M33 cluster sampleLocLocation notes (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq? Cluster number (except for the nucleus)meta.id;meta.mainintnullableprimaryNameCluster Identificationmeta.idcharRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainGDist? Galactocentric distancekpcpos.distance;pos.galactocentricfloatnullableMorphMorphology of clustersrc.morphcharJ/ApJS/122/431/table3M33 star cluster photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqCluster numbermeta.id;meta.mainintprimaryNameCluster Identificationmeta.idcharVmagV band magnitude within a 2.2'' radiusmagphot.mag;em.opt.Vfloate_VmagUncertainty in the V bandmagstat.error;phot.mag;em.opt.Vfloatn_VmagFlag on the V measurement (1)meta.notecharRad? Radius of the clusterarcsecphys.angSizefloatnullableB-V? B-V color within Rad radiimagphys.size.radiusfloatnullablee_B-V? Uncertainty in B-Vmagstat.error;phot.color;em.opt.BfloatnullableU-B? U-B color within Rad radiimagphys.size.radiusfloatnullablee_U-B? Uncertainty in U-Bmagstat.error;phot.color;em.opt.UfloatnullableU-V? U-V color within Rad radiimagphys.size.radiusfloatnullablee_U-V? Uncertainty in U-Vmagstat.error;phot.color;em.opt.UfloatnullableFUV? Far-Ultraviolet magnitude within Rad radiimagphot.mag;em.UV.100-200nmfloatnullablee_FUV? Uncertainty in the Far-UVmagstat.errorfloatnullablen_FUVFlag on the Far-UV observations (2)meta.notecharComCommentsmeta.notechar