J/AJ/146/43ivo://CDS.VizieR/J/AJ/146/43doi:10.26093/cds/vizier.51460043CDSPlatais I.Gosnell N.M.Meibom S.Kozhurina-Platais V.Bellini A.,Veillet C.Burkhead M.S.2017-12-12T14:44:23Z2014-07-11T15:32:59ZCDS support team

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

cds-question@unistra.fropen-star-clustersproper-motionsccd-photometryx-ray-sourcesastronomical-object-identificationWe present proper motions and astrometric membership analysis for 15750 stars around the intermediate-age open cluster NGC 6819. The accuracy of relative proper motions for well-measured stars ranges from ~0.2mas/yr within 10' of the cluster center to 1.1mas/yr outside this radius. In the proper motion vector-point diagram, the separation between the cluster members and field stars is convincing down to V~18 and within 10' from the cluster center. The formal sum of membership probabilities indicates a total of ~2500 cluster members down to V~22. We confirm the cluster membership of several variable stars, including some eclipsing binaries. The estimated absolute proper motion of NGC 6819 is {mu}_x_^abs^=-2.6+/-0.5 and {mu}_y_^abs^=-4.2+/-0.5mas/yr. A cross-identification between the proper motion catalog and a list of X-ray sources in the field of NGC 6819 resulted in a number of new likely optical counterparts, including a candidate CV. For the first time we show that there is significant differential reddening toward NGC 6819.2013AJ....146...43Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/729/L10 : KIC stars properties in NGC 6791 and NGC 6819 (Basu+, 2011)J/AJ/138/159 : NGC 6819 stellar radial-velocity and photometry (Hole+, 2009)J/MNRAS/358/795 : Variable stars in NGC 6819 field (Street+, 2005)J/AJ/126/2922 : Astrometry & membership in NGC 188 (Platais+, 2003; Pap XVII)J/AJ/124/601 : Absolute positions and proper motions in NGC 188https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/146/43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/146/43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/146/43https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/146/43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/146/43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/146/43/table4 (Catalog of positions and proper motions in NGC 6819)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/146/43/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/146/43/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/146/43/table4?GETtext/xml+votable180.050000true295.2215230640.465283060.005555555555555556Cone search capability for table J/AJ/146/43/table5 (Proposed optical counterparts of X-Ray sources in NGC 6819)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/146/43/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/146/43/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/146/43/table5?GETtext/xml+votable180.050000true295.33791740.0122220.0055555555555555565/3688https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/146/43?format=asciiX-raydefaultJ/AJ/146/43/table1Photographic plates and a set of CCD frames used in this studyTelTelescopemeta.id;instr.telcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlateNumber of plates in blue (B) and visual (V) bandpassesmeta.numbercharEpochMean epoch (or beginning of Epoch)yrtime.epochintEpoch2Most recent epoch (1919-33)time.epochcharVlim[17/23] Approximate limiting V magnitudemagphot.magintScalePlate scalearcsec/mminstr.scale;instr.platefloatFOVSize of the field-of-viewarcmininstr.setupcharJ/AJ/146/43/table4Catalog of positions and proper motions in NGC 6819Star[441/999643] Star number in the master catalog <[PGM2013] NNNNNN> in Simbadmeta.id;meta.mainintprimaryXSimbad column added by the CDSmeta.notecharRAJ2000Right ascension (Eq=J2000, Ep=2009.875)degpos.eq.ra;meta.mainDEJ2000Declination (Eq=J2000, Ep=2009.875)degpos.eq.dec;meta.maingmagSloan g' magnitudemagphot.mag;em.opt.Bfloatg-rSloan g'-r' color indexmagphot.color;em.opt.B;em.opt.RfloatpmRARelative proper motion in X (RA direction)mas/yrpos.pm;pos.eq.rafloate_pmRAStandard error in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDERelative proper motion in Y (Dec direction)mas/yrpos.pm;pos.eq.decfloate_pmDEStandard error in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatepmEstimated error of proper motion in X and Y (2)mas/yrstat.errorfloatMb[0/99] Cluster membership probability%statintoRATangential coordinate along RA direction (3)arcminpos.eq.ra;arith.difffloatoDETangential coordinate along Dec direction (3)arcminpos.eq.dec;arith.difffloatNt[0/6] Number of plates for McDonald 82inch (4)meta.numberintNu[0/13] Number of plates for Yale 1m (4)meta.numberintNv[0/2] Number of plates for Hale 5m (4)meta.numberintNz[0/2] Number of plates for Mt. Wilson 60inch (4)meta.numberintNd[0/1] Number of deleted datasetsmeta.numberintJ/AJ/146/43/table5Proposed optical counterparts of X-Ray sources in NGC 6819XMMUJX-ray source name (HHMMSS.s+DDMMSS; J2000)arcsecmeta.id.crosscharStar[388118/938065] Optical counterpart number in the master catalogmeta.recordintprimaryOSimbad column added by the CDSmeta.notechargmagSloan g' magnitudemagphot.mag;em.opt.Bfloatg-rSloan g'-r' color indexmagphot.color;em.opt.B;em.opt.RfloatXerrX-ray source estimated positional error from Gosnell et al. (2012ApJ...745...57G)arcsecstat.error;posfloatDist[0/4] Counterpart/X-ray source total distancearcsecpos.angDistancefloatpmRA? Relative proper motion in X (RA direction)mas/yrpos.pm;pos.eq.rafloatnullablepmDE? Relative proper motion in Y (Dec direction)mas/yrpos.pm;pos.eq.decfloatnullableMb[0/99]? Cluster membership probability (from proper motion)%statintnullableX[1/11]? ID number in Gosnell et al. 2012 (2)meta.idintnullableWOCS? WIYN Open Cluster Study (WOCS) number (3)meta.idintnullableSimbadNameSimbad column added by the CDSmeta.idchar_RAPosition of X-ray source from name (XMMUJ) (right ascension part)degpos.eq.ra;meta.main_DEPosition of X-ray source from name (XMMUJ) (declination part)degpos.eq.dec;meta.main