J/A+AS/127/423ivo://CDS.VizieR/J/A+AS/127/423CDSPiatti A.E.Bica E.Claria J.J.1998-02-18T06:35:16Z1998-02-18T07:35:04ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometryWe have carried out CCD observations of stars in the region of the open cluster Westerlund 1 through the V and I passbands. The direct images were obtained with the 24-inch telescope of the University of Toronto Southern Observatory situated at Las Campanas Observatory, Chile. After cross-correlating all independent V, (V-I) tables we have obtained a improved set of colour and magnitude values as compared to those based on a single measure.1998A&AS..127..423Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/127/423CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/116/263 : VI photometry of open clusters (Piatti+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/127/423https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/127/423http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/127/423https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/127/423https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/127/423http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/127/423GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/127/423/tablePhotometric datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar numbermeta.id;meta.maincharXposX coordinate (1)pixpos.cartesian.x;instr.detfloatYposY coordinate (1)pixpos.cartesian.y;instr.detfloatVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmag? V magnitude errormagstat.errorfloatnullableV-IV-I colourmagphot.color;em.opt.V;em.opt.Ifloate_V-I? V-I colour errormagstat.errorfloatnullableo_VmagNumber of measurementsmeta.numberint