J/AcA/56/253ivo://CDS.VizieR/J/AcA/56/253doi:10.26093/cds/vizier.120560253CDSKubiak M.Udalski A.Szymanski M.K.2025-09-25T20:15:05Z2007-09-30T21:44:30ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryPresented are results of determination of secular period changes for 569 contact binaries from the OGLE database with periods shorter than about one day and observations spanning 14 observing seasons. The statistically significant rates of secular changes found for 134 stars are distributed nearly symmetrically around zero with a half-width of the distribution equal to about 3.5x10^-7^d/yr. The remaining rates are confined within the error distribution with dispersion about 2.3x10^-7^d/yr. The largest rates of period change that have been found are of the order of 5x10^-6^d/yr.2006AcA....56..253Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AcA/56/253CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/244 : OGLE General Catalog of Stars. I. (Szymanski+ 1996)II/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996)V/119 : Catalogue of field contact binary stars (Pribulla+, 2003)V/120 : Catalog of early-type contact binaries (Bondarenko+, 1996)J/A+A/426/1001 : Catalog of contact binary stars (Csizmadia+, 2004)J/AcA/51/259 : Contact binaries in OGLE-I database (Szymanski+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AcA/56/253https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AcA/56/253http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AcA/56/253https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AcA/56/253https://vizier.iucaa.in/viz-bin/votable?-source=J/AcA/56/253http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AcA/56/253GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AcA/56/253/table1 (Contact binaries in OGLE database used for determination of secular period changes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AcA/56/253/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AcA/56/253/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AcA/56/253/table1?GETtext/xml+votable180.050000true270.9416667-29.79447220.0055555555555555566/28776 28778-28779 28864https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AcA/56/253?format=asciiOpticaldefaultJ/AcA/56/253/table1Contact binaries in OGLE database used for determination of secular period changesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldFieldmeta.id;obs.fieldcharStarStar number in the fieldmeta.id;obs.fieldintMSimbad column added by the CDSmeta.ref.urlcharPerPerioddtime.perioddoubleImagObserved brightness in I bandmagphot.mag;em.opt.IfloatV-I? Observed V-I colour indexmagphot.color;em.opt.V;em.opt.IfloatnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJ/AcA/56/253/table2Time derivatives of periods determined by the method of variance minimizationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldFieldmeta.id;obs.fieldcharStarStar number in the fieldmeta.id;obs.fieldintPBest value of the perioddtime.period;meta.modelleddoubledP/dtRate of period changed/yrarith.rate;time.perioddoubleNobsNumber of observationsmeta.numberintFstF-statisticsstat.fit.paramfloatPstP-statisticsstat.fit.paramfloatFileNameName of the light curve in "lc" subdirectorymeta.id;meta.maincharJ/AcA/56/253/table3Results of the "average O-C diagram" methodrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldFieldmeta.id;obs.fieldcharStarStar number in the fieldmeta.id;obs.fieldintPPerioddtime.perioddoubleNobsNumber of observationsmeta.numberintdP/dtRate of period change determined from the quadratic term in the O -C diagramd/yrarith.rate;time.perioddoublep.e.Formal error of the solutiond/yrstat.errordouble