I/257Bivo://CDS.VizieR/I/257BCDSWang J.J.Jiang P.F.2018-01-04T08:22:45Z2006-09-14T18:41:48ZCDS support team

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

cds-question@unistra.fropen-star-clustersastrometryproper-motionsHigh-precision proper motions for 257 and 296 stars in a 90'x90' region centered on BD+20 2170 were obtained from seven plates taken with the Zo-se 40cm refractor (f=6895mm) in March, 1986 (see the "Plate Summary" section below), combined with six AC plates and the stellar positions in Russell's (1976, Ph.D. Thesis, Pittsburgh University). Combined with other data, membership probabilities were estimated by an improved maximum likelihood method. A very good sample of 198 members is obtained with proper motion accuracies ranging from +/-0.2 to +/-5.0mas/yr, of which 60% are better than +/-1.0mas/yr; the completeness limit is about B=15.5mag. Note that the table published in electronic form associated to the paper published in 1995A&AS..113..419W presented positions not correctly associated to the stars (see the "History" section below)1991AcASn..32..176Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/257BCatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/55 : Radial Velocities in Open Clusters (Mermilliod 1979)J/AJ/106/1080 : Lithium in Praesepe (Soderblom+, 1993)J/A+A/298/115 : ROSAT study of Praesepe (Randish+, 1995)J/A+AS/109/29 : Very low mass stars in Praesepe (Hambly+, 1995)J/A+AS/129/9 : Delta Sct stars in Praesepe (Pena+ 1998)J/ApJ/521/682 : Binaries in the Praesepe and Coma clusters (Abt+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/257Bhttps://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/257Bhttp://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/257Bhttps://vizier.cds.unistra.fr/viz-bin/votable?-source=I/257Bhttps://vizier.iucaa.in/viz-bin/votable?-source=I/257Bhttp://vizieridia.saao.ac.za/viz-bin/votable?-source=I/257BGETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/257B/catalog (Data for 924 stars and their membership. (table 8 of paper in 1995A&AS..113..419W))https://vizier.cds.unistra.fr/viz-bin/conesearch/I/257B/catalog?https://vizier.iucaa.in/viz-bin/conesearch/I/257B/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/257B/catalog?GETtext/xml+votable180.050000true129.3427791720.177036110.0055555555555555565/1174 6/4687 4709 4720 4721https://cdsarc.cds.unistra.fr/viz-bin/moc/I/257B?format=asciiOpticaldefaultI/257B/catalogData for 924 stars and their membership. (table 8 of paper in 1995A&AS..113..419W)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1,924]+ Sequential numbermeta.recordintprimaryindexedRussel? Russell's (1976, Ph.D. Thesis) numbermeta.idintnullableKW? Klein-Wassink's (1927, Groningen Publ. 41)meta.idcharNArt? Artyukhina's (1971, Soob. Sternberg 172, 3)meta.idintnullableNJC? Jones & Cudworth's (1983AJ.....88..215J)meta.idintnullableAC[*] AC star is indicated with '*'meta.notecharMagV magnitude or B magnitude when there is a 'B' in the next columnmagphot.mag;em.opt.Vfloatf_Mag[B] When 'B' given magnitude is B magnitudemeta.codecharB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablef_B-V[PG] Photoelectric or photoGraphic colormeta.codecharr_B-V[CWGJRH] Origin of the photometrymeta.bib;meta.refcharq_B-V[BGFP] Quality of the photometrymeta.code.qual;phot.color;em.opt.BcharRAJ2000Right ascension Equinox=J2000.0, Epoch=1986.17pos.eq.ra;meta.mainDEJ2000Declination for Equinox=J2000.0, Epoch=1986.17pos.eq.dec;meta.mainpmRAProper motion component in right ascension reduced into the great circlemas/yrpos.pm;pos.eq.rafloate_pmRAStandard error of proper motion in RAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion component in declinationmas/yrpos.pm;pos.eq.decfloate_pmDEStandard error of proper motion in DEmas/yrstat.error;pos.pm;pos.eq.decfloatProbMembership probabilitystat.valuefloatMember[0,1] Membership judgement: '1' cluster star (Prob>=0.36) '0' field star (Prob<0.36)meta.code.memberintn_MemberNotes about previous membership judgementsmeta.notecharSimbadSimbad column added by the CDSchar