J/A+A/575/A120ivo://CDS.VizieR/J/A+A/575/A120doi:10.26093/cds/vizier.35750120CDSBouy H.Bertin E.Barrado D.Sarro L.M.Olivares J.Moraux E.,Bouvier J.Cuillandre J.-C.Ribas A.Beletsky Y.2018-02-02T10:34:12Z2015-03-09T08:52:35ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryproper-motionsMessier 35 (NGC 2168) is an important young nearby cluster. Its age, richness and relative proximity make it a privileged target for stellar evolution studies. The Kepler K2 mission recently observed it and provided high accuracy photometric time series of a large number of sources in this area of the sky. Identifying the cluster's members is therefore of high importance to optimize the interpretation and analysis of the Kepler K2 data. We aim at identifying the cluster's members by deriving membership probabilities for the sources within 1 degree of the cluster's center, going further away than equivalent previous studies. We measure accurate proper motions and multi-wavelength (optical and near-infrared) photometry using ground based archival images of the cluster. We use these measurements to compute membership probabilities. The list of candidate members from Barrado y Navascues et al. (2001ApJ...546.1006B, Cat. J/ApJ/546/1006) is used as training set to identify the cluster's locus in a multi-dimensional space made of proper motions, luminosities and colors. The final catalog includes 338892 sources with multi-wavelength photometry. Approximately half (194452) were detected at more than two epochs and we measured their proper motion and used it to derive membership probability. A total of 4349 candidate members with membership probabilities greater than 50% are found in this sample in the luminosity range between 10 and 22mag. The slow proper motion of the cluster and the overlap of its sequence with the field and background sequences in almost all color-magnitude and color-color diagrams complicate the analysis and the contamination level is expected to be significant. Our study nevertheless provides a coherent and quantitative membership analysis of Messier 35 based on a large fraction of the best ground-based data sets obtained over the past 18 years. As such, it represents a valuable input for follow-up studies using in particular the Kepler K2 photometric time series.2015A&A...575A.120Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/575/A120CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/306/361 : UBVI CCD photometry of M35 (NGC 2168) (Sung+ 1999)J/ApJ/546/1006 : VRI photometry of M35 (Barrado y Navascues+, 2001)J/ApJ/695/679 : Stellar rotation in M35 (Meibom+, 2009)J/AJ/139/1383 : Radial velocities in M35 (NGC 2168) (Geller+, 2010)J/AJ/148/85 : WIYN open cluster study. Photometry of M35 (Thompson+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/575/A120https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/575/A120http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/575/A120https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/575/A120https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/575/A120http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/575/A120GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/575/A120/table3 (Position, proper motion and multi-wavelength grizJHK photometry for 338892 sources within 1degree of Messier 35 center)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/575/A120/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/575/A120/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/575/A120/table3?GETtext/xml+votable180.050000true91.7320569425.0593050.0055555555555555565/6086 6/24338-24339 24342 24348 243508.650015785639275e-20 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/575/A120?format=asciiInfrareddefaultJ/A+A/575/A120/table3Position, proper motion and multi-wavelength grizJHK photometry for 338892 sources within 1degree of Messier 35 centerrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDANCeDANCe designation (HHMMSSss+DDMMSSs) (2)meta.id;meta.maincharindexedm_DANCe[abc] Non-unique DANCe name (2)meta.code.multipcharNep[1/1564] Total number of epochsmeta.numberintNpm[1/1564] Number of epochs used for the proper motion fitmeta.numberintRAJ2000Right ascension (J2000), at Epochdegpos.eq.ra;meta.mainindexede_RAJ2000rms uncertainty on RAdegarcsecstat.error;pos.eq.rafloatDEJ2000Declination (J2000), at Epochdegpos.eq.dec;meta.mainindexede_DEJ2000rms uncertainty on DEdegarcsecstat.error;pos.eq.decfloatpmRA?=- Proper motion along RA (pmRA*cosDE) (1)mas/yrpos.pm;pos.eq.radoublenullablee_pmRA?=- rms uncertainty on pmRA (1)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE?=- Proper motion along DE (1)mas/yrpos.pm;pos.eq.decdoublenullablee_pmDE?=- rms uncertainty on pmDE (1)mas/yrstat.error;pos.pm;pos.eq.decfloatnullablechi2?=- Reduced {chi}^2^ of the proper motion fitstat.fit.chi2;pos.pm;stat.fit.paramdoublenullableEpoch[1997/2012] Mean epoch of observationyrtime.epochdoubleb_EpochEarliest epoch used for the proper motion fityrtime.epoch;instr.setupdoubleB_EpochLastest epoch used for the proper motion fityrtime.epoch;instr.setupdoubleFlags[0/7] Extraction flags (SExtractor flag)meta.code.errorintgmag? SDSS g magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag? rms uncertainty on gmagmagstat.error;phot.mag;em.opt.Bfloatnullablermag? SDSS r magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag? rms uncertainty on rmagmagstat.error;phot.mag;em.opt.Rfloatnullableimag? SDSS i magnitudemagphot.mag;em.opt.Ifloatnullablee_imag? rms uncertainty on imagmagstat.error;phot.mag;em.opt.Ifloatnullablezmag? SDSS z magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag? rms uncertainty on zmagmagstat.error;phot.mag;em.opt.IfloatnullableJmag? 2MASS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag? 2MASS Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullableMm[0/1]? Membership probabilitystat.probabilityfloatnullable