J/MNRAS/503/236ivo://CDS.VizieR/J/MNRAS/503/236doi:10.26093/cds/vizier.75030236CDSJadhav V.V.Pennock C.M.Subramaniam A.Sagar R.Nayak P.K.2024-08-21T20:17:29Z2021-03-24T09:55:35ZCDS support team

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

cds-question@unistra.fropen-star-clustersultraviolet-photometryvisible-astronomyWe present a study of six open clusters (Berkeley 67, King 2, NGC 2420, NGC 2477, NGC 2682 and NGC 6940) using the Ultra Violet Imaging Telescope (UVIT) aboard ASTROSAT and Gaia EDR3. We present their Gaia EDR3 membership catalogues and UV photometric catalogues along with membership probability. We used a supervised machine learning algorithm along with a Gaussian mixture model and used combinations of astrometric, photometric and systematic parameters to train the algorithm. We classified the stars as members, candidates and field using two such combinations. This generic technique is robust, reproducible, versatile in various cluster environments and is applicable to other data-sets. We could detect 200-2500 additional members using this method with respect to Gaia DR2 studies. We estimated cluster properties such as mean space velocities, distances, number of members and core radii. We detected 3 to 700 member stars, which include blue stragglers, main-sequence and red giants in various UVIT images of six clusters. We created UV-Optical colour-magnitude diagrams to find that majority of the sources in NGC 2682 and a few in NGC 2420, NGC 2477 and NGC 6940 showed excess UV flux. NGC 2682 images have 10 white dwarf detections in far-UV. The massive cluster NGC 2477 has 92/576 members detected in the far-UV/near-UV, which will be useful to study the UV properties of stars in the extended turn-off and in various evolutionary stages from main-sequence to red clump. Future studies will carry out panchromatic analysis of noteworthy members detected in this study.2021MNRAS.503..236Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/503/236CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/503/236https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/503/236http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/503/236https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/503/236https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/503/236http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/503/236GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/503/236/gaia-cat (Membership probability of individual stars of six open clusters with Gaia EDR3 (table B1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/236/gaia-cat?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/236/gaia-cat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/236/gaia-cat?GETtext/xml+votable180.050000true69.6237676163573350.538088691978610.005555555555555556Cone search capability for table J/MNRAS/503/236/ber67 (UV photometric catalogue of Berkeley 67)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/236/ber67?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/236/ber67?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/236/ber67?GETtext/xml+votable180.050000true69.4122650.725380.005555555555555556Cone search capability for table J/MNRAS/503/236/king2 (UV photometric catalogue of King 2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/236/king2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/236/king2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/236/king2?GETtext/xml+votable180.050000true12.735458.18570.005555555555555556Cone search capability for table J/MNRAS/503/236/ngc2420 (UV photometric catalogue of NGC 2420)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/236/ngc2420?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/236/ngc2420?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/236/ngc2420?GETtext/xml+votable180.050000true114.646321.545280.005555555555555556Cone search capability for table J/MNRAS/503/236/ngc2477 (UV photometric catalogue of NGC 2477)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/236/ngc2477?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/236/ngc2477?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/236/ngc2477?GETtext/xml+votable180.050000true118.0221-38.505160.005555555555555556Cone search capability for table J/MNRAS/503/236/ngc2682 (UV photometric catalogue of NGC 2682)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/236/ngc2682?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/236/ngc2682?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/236/ngc2682?GETtext/xml+votable180.050000true132.798611.756280.005555555555555556Cone search capability for table J/MNRAS/503/236/ngc6940 (UV photometric catalogue of NGC 6940)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/503/236/ngc6940?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/503/236/ngc6940?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/503/236/ngc6940?GETtext/xml+votable180.050000true308.643328.258290.0055555555555555566/1839 1850 3014-3015 3020-3021 4253 4255 4296 4298 4783 6148-6149 13193 13195-13196 13198-13199 13217 13220 39347 39350 39353 393561.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/503/236?format=asciiUVOpticaldefaultJ/MNRAS/503/236/gaia-catMembership probability of individual stars of six open clusters with Gaia EDR3 (table B1)SimbadNameSimbad column added by the CDSmeta.idcharnullable_RA.icrsRight ascension (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaEDR3Gaia EDR3 source_idmeta.id;meta.mainRA_ICRSGaia EDR3 right ascension (ICRS) at Ep=2016degpos.eq.ra;meta.mainindexedGmag? Gaia EDR3 mean G magnitudemagphot.mag;em.optdoublenullableG-RP? Gaia EDR3 G minus RP colourmagphot.color;em.opt;em.optdoublenullableQual[0/1] Quality filter (see Tab.3 in the paper)meta.code.qual;instr.filterintPF6Membership probability using F6stat.probabilityfloatPF8Membership probability using F8stat.probabilityfloatPF10Membership probability using F10stat.probabilityfloatPGMM? Membership probability using GMMstat.probabilityfloatnullableClass[MCF] Classification as Member, Candidate and Field (see eq. 5)meta.code.classcharClusterCorresponding cluster (1)meta.id.parentchar_DE.icrsDeclination (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedDE_ICRSGaia EDR3 declination (ICRS) at Ep=2016degpos.eq.dec;meta.mainindexedJ/MNRAS/503/236/ber67UV photometric catalogue of Berkeley 67recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSMean right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSMean declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainN242W? UVIT/N242W magnitude (AB)magphot.mag;em.UV.200-300nmfloatnullableN242Wsat? UVIT/N242W magnitude (AB) for saturated starsmagphot.mag;em.UV.200-300nmfloatnullablee_N242W? Error in N242W magnitudemagstat.errorfloatnullableN245M? UVIT/N245M magnitude (AB)magphot.mag;em.UV.200-300nmfloatnullablee_N245M? Error in N245M magnitudemagstat.errorfloatnullablePF6? Membership probability using F6stat.probabilityfloatnullablePF10? Membership probability using F10stat.probabilityfloatnullableClass[MCF] Classification as Member, Candidate and Fieldmeta.code.classchar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/MNRAS/503/236/king2UV photometric catalogue of King 2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSMean right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSMean declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainF148W? UVIT/F148W magnitude (AB)magphot.mag;em.UV.100-200nmfloatnullableF148Wsat? UVIT/F148W magnitude (AB) for saturated starsmagphot.mag;em.UV.100-200nmfloatnullablee_F148W? Error in F148W magnitudemagstat.errorfloatnullableN219M? UVIT/N219M magnitude (AB)magphot.mag;em.UV.200-300nmfloatnullablee_N219M? Error in N219M magnitudemagstat.errorfloatnullablePF6? Membership probability using F6stat.probabilityfloatnullablePF10? Membership probability using F10stat.probabilityfloatnullableClass[MCF] Classification as Member, Candidate and Fieldmeta.code.classchar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/MNRAS/503/236/ngc2420UV photometric catalogue of NGC 2420RA_ICRSMean right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainF148WUVIT/F148W magnitude (AB)magphot.mag;em.UV.100-200nmfloate_F148WError in F148W magnitudemagstat.errorfloatPF6? Membership probability using F6stat.probabilityfloatnullablePF10? Membership probability using F10stat.probabilityfloatnullableClass[MCF] Classification as Member, Candidate and Fieldmeta.code.classchar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDE_ICRSMean declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainJ/MNRAS/503/236/ngc2477UV photometric catalogue of NGC 2477recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSMean right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSMean declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainF148W? UVIT/F148W magnitude (AB)magphot.mag;em.UV.100-200nmfloatnullableF148Wsat? UVIT/F148W magnitude (AB) for saturated starsmagphot.mag;em.UV.100-200nmfloatnullablee_F148W? Error in F148W magnitudemagstat.errorfloatnullableN263M? UVIT/N263M magnitude (AB)magphot.mag;em.UV.200-300nmfloatnullableN263Msat? UVIT/N263M magnitude (AB) for saturated starsmagphot.mag;em.UV.200-300nmfloatnullablee_N263M? Error in N263M magnitudemagstat.errorfloatnullablePF6? Membership probability using F6stat.probabilityfloatnullablePF10? Membership probability using F10stat.probabilityfloatnullableClass[MCF] Classification as Member, Candidate and Fieldmeta.code.classchar_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/MNRAS/503/236/ngc2682UV photometric catalogue of NGC 2682F169Msat? UVIT/F169M magnitude (AB) for saturated starsmagphot.mag;em.UV.100-200nmfloatnullablee_F169M? Error in F169M magnitudemagstat.errorfloatnullablePF6? Membership probability using F6stat.probabilityfloatnullablePF10? Membership probability using F10stat.probabilityfloatnullableClass[MCF] Classification as Member, Candidate and Fieldmeta.code.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSMean right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSMean declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainF148W? UVIT/F148W magnitude (AB)magphot.mag;em.UV.100-200nmfloatnullable_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexede_F148W? Error in F148W magnitudemagstat.errorfloatnullableF154W? UVIT/F154W magnitude (AB)magphot.mag;em.UV.100-200nmfloatnullableF154Wsat? UVIT/F154W magnitude (AB) for saturated starsmagphot.mag;em.UV.100-200nmfloatnullablee_F154W? Error in F154W magnitudemagstat.errorfloatnullableF169M? UVIT/F169M magnitude (AB)magphot.mag;em.UV.100-200nmfloatnullableF148Wsat? UVIT/F148W magnitude (AB) for saturated starsmagphot.mag;em.UV.100-200nmfloatnullableJ/MNRAS/503/236/ngc6940UV photometric catalogue of NGC 6940recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSMean right ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSMean declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainF169M? UVIT/F169M magnitude (AB)magphot.mag;em.UV.100-200nmfloatnullableF169Msat? UVIT/F169M magnitude (AB) for saturated starsmagphot.mag;em.UV.100-200nmfloatnullable_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexede_F169M? Error in F169M magnitudemagstat.errorfloatnullablePF6? Membership probability using F6stat.probabilityfloatnullablePF10? Membership probability using F10stat.probabilityfloatnullableClass[MCF] Classification as Member, Candidate and Fieldmeta.code.classchar