J/PAZh/41/367ivo://CDS.VizieR/J/PAZh/41/367CDSAnanjevskaja Yu.K.Frolov V.N.Polyakov E.V.2015-09-16T13:27:03Z2015-09-16T13:22:52ZCDS support team

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

cds-question@unistra.fropen-star-clustersproper-motionsThe results of a comprehensive study of the Galactic open cluster NGC 6800 are presented. The positions of stars to a limiting magnitude B<=16.5mag in an 80x80 arcmin field centered at the cluster were measured on eight plates from the Pulkovo normal astrograph with a maximum epoch difference of 57 years. The measurements were performed with the Pulkovo "Fantasy" automated measuring system. The corresponding field from the 2MASS catalogue was used as an additional plate. As a result, the relative proper motions of stars were obtained with a root-mean-square error of 3.0 mas/yr. A catalogue of BV and JHK magnitudes for objects in the investigated region was compiled from available published resources. The astrometric selection of cluster members was made by the maximum likelihood method. An individual cluster membership probability of a star P>=60% served as the first selection criterion. The position of a star on the photometric color-magnitude (V-(B-V)), J-(J-Ks)) diagrams was considered as the second selection criterion. On the basis of these criteria, it was established that 109 stars are members of NGC 6800. These data were used to refine the physical parameters of the cluster: the mean reddening E(B-V)=0.40mag, the true distance modulus (V-Mv)0=10.05mag, and the cluster age ~250Myr. The luminosity and mass functions were constructed. The position of the center of the cluster NGC 6800 was improved: RA=19:27:11.2 and DE=+25:07:24 (2000).2015PAZh...41..367Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PAZh/41/367CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/252 : The USNO-A2.0 Catalogue (Monet+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PAZh/41/367https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PAZh/41/367http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PAZh/41/367https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PAZh/41/367https://vizier.iucaa.in/viz-bin/votable?-source=J/PAZh/41/367http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PAZh/41/367GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PAZh/41/367/table2 (Stars proper motions and estimations of their belonging to the cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PAZh/41/367/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/PAZh/41/367/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PAZh/41/367/table2?GETtext/xml+votable180.050000true6/14351 14362 14372 14373 14375 14384 14386https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PAZh/41/367?format=asciiOpticaldefaultJ/PAZh/41/367/table2Stars proper motions and estimations of their belonging to the clusterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqNumber of a star according to our studymeta.numberintUSNO-A2.0Name of the star in USNO-A 2.0meta.id;meta.maincharXRectangular coordinate X (1)arcminpos.cartesian.xdoubleYRectangular coordinate Y (1)arcminpos.cartesian.y;instr.detdoublepmX? X proper motion of the starmas/yrpos.pm;pos.cartesian.xfloatnullablee_pmX? Standard error on pmXmas/yrstat.errorfloatnullablepmY? Y proper motionmas/yrpos.pm;pos.cartesian.yfloatnullablee_pmY? Standard error on pmYmas/yrstat.errorfloatnullableNPlate? Number of plates usedmeta.numberintnullablePmemb? Cluster membership probability%statintnullableBmagB magnitudemagphot.mag;em.opt.BfloatNotesNotes (2)meta.notecharNameNames of the star in the BD, HD, and Tycho catalogues, if existmeta.idchar_RApositions from USNA-A2.0 name (right ascension part)degpos.eq.ra;meta.mainnullable_DEpositions from USNA-A2.0 name (declination part)degpos.eq.dec;meta.mainnullable