J/MNRAS/408/1147ivo://CDS.VizieR/J/MNRAS/408/1147doi:10.26093/cds/vizier.74081147CDSPiatti A.E.Claria J.J.Ahumada A.V.2024-07-12T20:14:40Z2013-09-25T16:00:21ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryccd-photometryWe present CCD photometry in the Johnson UBV and Kron-Cousins I systems down to V~22.0 for the open clusters NGC 2311, Trumpler 6, NGC 2432 and BH 54 and their surrounding fields. Trumpler 6 and BH 54 have never been studied before and so we provide, for the first time, estimates of their fundamental parameters. We obtained colour-magnitude diagrams (CMDs) and colour-colour diagrams cleaned from field star contamination by statistically subtracting stars in terms of spatial density, magnitude and colour distributions. Cluster angular radii were estimated from star counts in appropriate-sized boxes distributed throughout the entire observed fields. Using the cleaned CMDs and colour-colour diagrams, we applied sound photometric membership criteria to discriminate cluster members from interloper field stars. The interstellar extinction across the cluster fields derived from the 100-{mu}m dust emission full-sky maps can be considered uniform within the quoted uncertainties. The E(B-V) and E(V-I) colour excesses and the apparent distance moduli of the clusters were estimated from the fit of the zero-age main-sequence to the colour-colour diagrams and CMDs, respectively. Cluster ages were determined from the comparison of the four clusters' CMDs with solar metallicity theoretical isochrones of the Geneva group. All the clusters were found to be moderately young objects, their ages ranging between 60 and 250Myr.2010MNRAS.408.1147Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/408/1147CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/107/39 : IC 2714 UBV photometry (Claria+ 1994)J/A+AS/127/423 : VI photometry of Westerlund 1 and 2 (Piatti+ 1998)J/A+AS/128/131 : UBV photometry of NGC 2323 (Claria+ 1998)J/ApJS/116/263 : VI photometry of open clusters (Piatti+ 1998)J/A+A/360/529 : BVI photometry of 4 young open clusters (Piatti+, 2000)J/A+A/370/931 : BVI photometry of 4 open clusters (Piatti+, 2001)J/A+A/379/453 : BVI photometry of 5 open cluster candidates (Piatti+, 2001)J/A+A/388/179 : BVI photometry of two open clusters (Piatti+, 2002)J/A+A/399/543 : Photometry and Coravel obs. of IC 2488 (Claria+, 2003)J/A+A/409/541 : UBV photometry of IC 2395 (Claria+, 2003)J/MNRAS/340/1249 : VIc magnitudes in NGC 2194 (Piatti+, 2003)J/MNRAS/346/390 : VI and CMT1 photometry of NGC 2627 (Piatti+, 2003)J/MNRAS/349/641 : VIc, CT1 magnitudes in Trumpler 5 (Piatti+, 2004)J/A+A/418/979 : VI and CT1 photometry in NGC 2324 field (Piatti+, 2004)J/A+A/421/991 : CT1 photometry in Tombaugh 1 (Piatti+, 2004)J/PASP/117/22 : NGC 6318 CCD BVI photometry (Piatti+, 2005)J/other/NewA/11.262 : BVIc photometry in Lynga 11 (Piatti+, 2006)J/MNRAS/367/599 : BVI photometry of NGC 5288 (Piatti+, 2006)J/MNRAS/377/1737 : BVI photometry of NGC 2489 (Piatti+, 2007)J/MNRAS/397/1073 : UBVI photometry in NGC 2587 (Piatti+, 2009)J/PASP/122/288 : UBVI_KC_ photometry in NGC 2309 (Piatti+, 2010)J/MNRAS/402/2720 : 5 Galactic open cluster UBVI photometry (Piatti+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/408/1147https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/408/1147http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/408/1147https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/408/1147https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/408/1147http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/408/1147GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/408/1147/table1 (Basic parameters of the four studied OCs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/408/1147/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/408/1147/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/408/1147/table1?GETtext/xml+votable180.050000true104.44583-4.611670.005555555555555556Cone search capability for table J/MNRAS/408/1147/table4 (CCD UBVI data for stars in the field of NGC 2311)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/408/1147/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/408/1147/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/408/1147/table4?GETtext/xml+votable180.050000true104.59425194-4.621023610.005555555555555556Cone search capability for table J/MNRAS/408/1147/table5 (CCD UBVI data for stars in the field of Trumpler 6)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/408/1147/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/408/1147/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/408/1147/table5?GETtext/xml+votable180.050000true111.71511361-24.246766390.005555555555555556Cone search capability for table J/MNRAS/408/1147/table6 (CCD UBVI data for stars in the field of NGC 2432)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/408/1147/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/408/1147/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/408/1147/table6?GETtext/xml+votable180.050000true115.1457247-18.94461420.005555555555555556Cone search capability for table J/MNRAS/408/1147/table7 (CCD UBVI data for stars in the field of BH 54)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/408/1147/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/408/1147/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/408/1147/table7?GETtext/xml+votable180.050000true132.3020097-44.44675140.0055555555555555566/22038 22044 37882 39248 39909 39911 406203.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/408/1147?format=asciiOpticalInfrareddefaultJ/MNRAS/408/1147/table1Basic parameters of the four studied OCsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatClassTrumpler classsrc.classcharDiamAngular diameterarcminphys.angSizefloatNmeasNumber of measured starsmeta.numberintNinfNumber of inferred cluster starsmeta.numberintFileNameName of the table with photometrymeta.id;phot;meta.tablecharSimbadSimbad column added by the CDSmeta.refcharJ/MNRAS/408/1147/table4CCD UBVI data for stars in the field of NGC 2311recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number within the clustermeta.recordintXposX position (1)pixpos.cartesian.x;instr.detdoubleYposY position (1)pixpos.cartesian.y;instr.detdoubleVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloato_VmagNumber of observations in Vmagmeta.numberintU-B? Johnson U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B? rms uncertainty on U-Bmagstat.error;phot.color;em.opt.Ufloatnullableo_U-B? Number of observations in U-Bmeta.numberintnullableB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.Bfloatnullableo_B-V? Number of observations in B-Vmeta.numberintnullableV-I? Johnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? rms uncertainty on V-Imagstat.error;phot.color;em.opt.Vfloatnullableo_V-I? Number of observations in V-Imeta.numberintnullable_RAPosition computed from a comparison with UCAC4 (I/322 )({sigma}=0.06'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with UCAC4 (I/322 )({sigma}=0.06'') (declination part)degpos.eq.dec;meta.mainJ/MNRAS/408/1147/table5CCD UBVI data for stars in the field of Trumpler 6recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number within the clustermeta.recordintXposX position (1)pixpos.cartesian.x;instr.detdoubleYposY position (1)pixpos.cartesian.y;instr.detdoubleVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloato_VmagNumber of observations in Vmagmeta.numberintU-B? Johnson U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B? rms uncertainty on U-Bmagstat.error;phot.color;em.opt.Ufloatnullableo_U-B? Number of observations in U-Bmeta.numberintnullableB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.Bfloatnullableo_B-V? Number of observations in B-Vmeta.numberintnullableV-I? Johnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? rms uncertainty on V-Imagstat.error;phot.color;em.opt.Vfloatnullableo_V-I? Number of observations in V-Imeta.numberintnullable_RAPosition computed from a comparison with UCAC4 (I/322) ({sigma}=0.05'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with UCAC4 (I/322) ({sigma}=0.05'') (declination part)degpos.eq.dec;meta.mainJ/MNRAS/408/1147/table6CCD UBVI data for stars in the field of NGC 2432recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number within the clustermeta.recordintXposX position (1)pixpos.cartesian.x;instr.detdoubleYposY position (1)pixpos.cartesian.y;instr.detdoubleVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloato_VmagNumber of observations in Vmagmeta.numberintU-B? Johnson U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B? rms uncertainty on U-Bmagstat.error;phot.color;em.opt.Ufloatnullableo_U-B? Number of observations in U-Bmeta.numberintnullableB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.Bfloatnullableo_B-V? Number of observations in B-Vmeta.numberintnullableV-I? Johnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? rms uncertainty on V-Imagstat.error;phot.color;em.opt.Vfloatnullableo_V-I? Number of observations in V-Imeta.numberintnullable_RAPosition computed from a comparison with UCAC4 (I/322) ({sigma}=0.36'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with UCAC4 (I/322) ({sigma}=0.36'') (declination part)degpos.eq.dec;meta.mainJ/MNRAS/408/1147/table7CCD UBVI data for stars in the field of BH 54recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number within the clustermeta.recordintXposX position (1)pixpos.cartesian.x;instr.detdoubleYposY position (1)pixpos.cartesian.y;instr.detdoubleVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloato_VmagNumber of observations in Vmagmeta.numberintU-B? Johnson U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B? rms uncertainty on U-Bmagstat.error;phot.color;em.opt.Ufloatnullableo_U-B? Number of observations in U-Bmeta.numberintnullableB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? rms uncertainty on B-Vmagstat.error;phot.color;em.opt.Bfloatnullableo_B-V? Number of observations in B-Vmeta.numberintnullableV-I? Johnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? rms uncertainty on V-Imagstat.error;phot.color;em.opt.Vfloatnullableo_V-I? Number of observations in V-Imeta.numberintnullable_RAPosition computed from a comparison with UCAC4 (I/322) ({sigma}=0.10'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with UCAC4 (I/322) ({sigma}=0.10'') (declination part)degpos.eq.dec;meta.main