J/A+AS/118/407ivo://CDS.VizieR/J/A+AS/118/407CDSNordstroem B.Andersen J.Andersen M.I.1997-12-09T18:13:15Z1997-12-09T19:13:10ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometryradial-velocityWe present new CCD photometry in the b and y colours of the Stroemgren uvby system for 310 stars in a 13'x13' field centered on the intermediate-age open cluster NGC 3680. Careful cross-checks indicate that previously published BV photometry of NGC 3680 is affected by random and/or systematic errors precluding its use in critical comparison with theoretical isochrone computations. Detailed notes on several individual stars are given. In addition, we present =~400 new photoelectric radial-velocity observations of 109 stars obtained with the CORAVEL scanner during the period 1988-1994. These data allow substantially complete identification of member and non-member stars in the field, and of spectroscopic binaries in both groups. Rotational velocities have also been derived for the programme stars, and our velocity variability criteria for stars of all rotations are described. The further astrophysical discussion of the data, including the definition of radial-velocity membership criteria, theoretical isochrone fitting, and the dynamical state of the cluster and the origin of its "bimodal turnoff", will appear in a separate paper (Nordstroem et al. 1996).1996A&AS..118..407Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/118/407CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/118/407https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/118/407http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/118/407https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/118/407https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/118/407http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/118/407GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/118/407/table1 (Coordinates and CCD photometry for 352 stars in the field of NGC 3680)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/118/407/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/118/407/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/118/407/table1?GETtext/xml+votable180.050000true171.27375-43.1980.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/118/407?format=asciiOpticaldefaultJ/A+AS/118/407/table1Coordinates and CCD photometry for 352 stars in the field of NGC 3680recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNo[1/9041] Identification number from papermeta.id;meta.mainintm_NoMultiplicity index on Nometa.code.multipcharRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainnullableVmag? V magnitudemagphot.mag;em.opt.Bfloatb-y? b-y color index in Stroemgren systemmagphot.color;em.opt.B;em.opt.VfloatJ/A+AS/118/407/table2Mean radial and rotational velocities and derived parameters for 109 stars in the field of NGC 3680recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNo[1/7020] Identification number from papermeta.id;meta.mainintm_NoMultiplicity index on Nometa.code.multipcharKPNumber in Kozhurina-Platais et al. (1995)meta.idintRVMean radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVMean error of mean radial velocitykm/sstat.errorfloato_RVNumber of radial-velocity observationsmeta.numberintsigmaOObserved standard deviation (one obs.)km/sstat.stdevfloatsigmaPPredicted standard deviation (one obs.)km/sstat.stdevfloatO/Psigma? ratio observed/predicted standard deviationsstat.errorfloatProb? Probability that radial velocity is constantstat.fit.goodnessfloatRVtot? total observed range in radial velocitykm/sphys.veloc;pos.heliocentricfloatObsTime span covered by observationsdtime.intervalintvsini? mean projected rotational velocitykm/sphys.veloc.rotatfloate_vsini? Mean error of rotational velocitykm/sstat.errorfloatComComments, M: Data from Mermilliod et al. (1995) *: See remark in paper itselfmeta.notecharJ/A+AS/118/407/table3Individual radial-velocity observation of the stars in table2m_NoMultiplicity index on Nometa.code.multipcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNo[1/7020] Identification number from papermeta.id;meta.mainintHJDHeliocentric Julian Date of observationdtime.epochdoubleRVRadial velocity (for double-lined binaries: primary component data)km/sphys.veloc;pos.heliocentricfloate_RVPredicted uncertainty of observed velocitykm/sstat.errorfloatRV2? Radial velocity of the secondary component for double-lined binarieskm/sphys.veloc;pos.heliocentricfloate_RV2? Predicted uncertainty of observed velocitykm/sstat.errorfloat