J/other/ApSS/355ivo://CDS.VizieR/J/other/ApSS/355.267CDSYontan T.Bilir S.Bostanc Z.F.Ak T.Karaali S.Guver T.Ak S.,Duran S.Paunzen E.2015-09-07T14:01:51Z2015-09-07T14:01:19ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomyWide-band photometryccd-photometryWe present the results of CCD UBVRI observations of the open cluster NGC 6811 obtained on 18th July 2012 with the 1m telescope at the TIBITAK National Observatory (TUG). Using these photometric results, we determine the structural and astrophysical parameters of the cluster. The mean photometric uncertainties are better than 0.02 mag in the V magnitude and B-V, V-R, and V-I colour indices to about 0.03mag for U-B among stars brighter than magnitude V=18. Cluster member stars were separated from the field stars using the Galaxia model of Sharma et al. (2011ApJ...730....3S) together with other techniques. The core radius of the cluster is found to be r_c_=3.60arcmin. The astrophysical parameters were determined simultaneously via Bayesian statistics using the colour-magnitude diagrams V versus B-V, V versus V-I, V versus V-R, and V versus R-I of the cluster. The resulting most likely parameters were further confirmed using independent methods, removing any possible degeneracies. The colour excess, distance modulus, metallicity and the age of the cluster are determined simultaneously as E(B-V)=0.05+/-0.01mag, {mu}=10.06+/-0.08mag, [M/H]=-0.10+/-0.01dex and t=1.00+/-0.05Gyr, respectively. Distances of five red clump stars which were found to be members of the cluster further confirm our distance estimation.2015Ap&SS.355..267Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/ApSS/355.267CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/PAZh/25/115 : A study of the open cluster NGC 6811 (Glushkova+, 1999)J/ApJ/733/L9 : Stellar rotation for 71 NGC 6811 members (Meibom+, 2011)J/other/RMxAA/47.309 : NGC 6811 & NGC 6830 uvby-{beta} photometry (Pena+, 2011)J/AJ/145/7 : NGC 6811 UBVRI CCD photometry (Janes+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/ApSS/355.267https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/ApSS/355.267http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/ApSS/355.267https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/ApSS/355.267https://vizier.iucaa.in/viz-bin/votable?-source=J/other/ApSS/355.267http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/ApSS/355.267GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/ApSS/355.267/table3 (Photometric catalogue for the open cluster NGC 6811)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/ApSS/355.267/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/other/ApSS/355.267/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/ApSS/355.267/table3?GETtext/xml+votable180.050000true294.327958346.55108060.0055555555555555566/151213.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/ApSS/355.267?format=asciiOpticalInfrareddefaultJ/other/ApSS/355.267/table3Photometric catalogue for the open cluster NGC 6811recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/1591] Sequential numbermeta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainVmagVisual magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on visual magnitudemagstat.error;phot.mag;em.opt.VfloatU-BU-B colour indexmagphot.color;em.opt.U;em.opt.Bfloate_U-Brms uncertainty on U-B colour indexmagstat.error;phot.color;em.opt.UfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.Vfloate_B-Vrms uncertainty on B-V colour indexmagstat.error;phot.color;em.opt.BfloatV-RV-R colour indexmagphot.color;em.opt.V;em.opt.Rfloate_V-Rrms uncertainty on V-R colour indexmagstat.error;phot.color;em.opt.VfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.Ifloate_V-Irms uncertainty on V-I colour indexmagstat.error;phot.color;em.opt.VfloatR-IR-I colour indexmagphot.color;em.opt.R;em.opt.Ifloate_R-Irms uncertainty on R-I colour indexmagstat.error;phot.color;em.opt.Rfloat