J/A+AS/122/111ivo://CDS.VizieR/J/A+AS/122/111CDSPandey A.K.Durgapal A.K.Bhatt B.C.Mohan V.Mahra H.S.1997-12-09T18:28:47Z1997-12-09T19:28:44ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomyWide-band photometryWe present UBVRI CCD photometry for previously unstudied open clusters (Be 64 and Be 69). Photometry has also been carried out for nearby fields to correct f or the effects of field stars contamination. From the colour-colour diagram the reddening for Be 64 and Be 69 is estimated to be ~1.05mag and ~0.65mag respectively. In case of Be 69 the comparison of observational colour-magnitude diagram (CMD) with the standard isochrones of VandenBerg (19855ApJS...58..711V) indicates an apparent discrepancy between the shape of the turnoff and isochrones. The morphological features of the CMDs of Be 69 are better understood in terms of convective overshooting. The comparison of CMDs of both the clusters with the convective overshoot models (Bertelli et al. 1994A&AS..106..275B) produces a good fit for a metallicity Z=0.008 and age =0.8-1.0Gyr. An apparent distance modulus (m-M)=16.2 and 14.3 has been estimated for Be 64 and Be 69, respectively, which corresponds to a distance of 3880+/-480pc and 2860+/-310pc, respectively.1997A&AS..122..111Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/122/111CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/122/111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/122/111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/122/111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/122/111https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/122/111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/122/111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+AS/122/111/table2Magnitudes and colours of the stars in the field of Be 64n_U-B[*] No measure (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoSerial Number (starts by N or S for table3)meta.numbercharXposX-coordinatepixpos.cartesian.x;instr.detfloatYposY-Coordinatepixpos.cartesian.y;instr.detfloatVmagV magnitudemagphot.mag;em.opt.VfloatU-B? U-B color indexmagphot.color;em.opt.U;em.opt.BfloatB-V? B-V color indexmagphot.color;em.opt.B;em.opt.Vfloatn_B-V[*] No measure (1)meta.notecharV-I? V-I color indexmagphot.color;em.opt.V;em.opt.Ifloatn_V-I[*] No measure (1)meta.notecharV-R? V-R color indexmagphot.color;em.opt.V;em.opt.Rfloatn_V-R[*] No measure (1)meta.notecharJ/A+AS/122/111/table3Magnitudes and colours of the stars in the field of Be 69 (North + South regions)n_V-R[*] No measure (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoSerial Number (starts by N or S for table3)meta.numbercharXposX-coordinatepixpos.cartesian.x;instr.detfloatYposY-Coordinatepixpos.cartesian.y;instr.detfloatVmagV magnitudemagphot.mag;em.opt.VfloatU-B? U-B color indexmagphot.color;em.opt.U;em.opt.Bfloatn_U-B[*] No measure (1)meta.notecharB-V? B-V color indexmagphot.color;em.opt.B;em.opt.Vfloatn_B-V[*] No measure (1)meta.notecharV-I? V-I color indexmagphot.color;em.opt.V;em.opt.Ifloatn_V-I[*] No measure (1)meta.notecharV-R? V-R color indexmagphot.color;em.opt.V;em.opt.Rfloat