J/A+A/606/A92ivo://CDS.VizieR/J/A+A/606/A92doi:10.26093/cds/vizier.36060092CDSMowlavi N.Lecoeur-Taibi I.Holl B.Rimoldini L.Barblan F.Prsa A.,Kochoska A.Suveges M.Eyer L.Nienartowicz K.Jevardat G.Charnas J.,Guy L.Audard M.2017-10-26T12:53:10Z2017-10-20T07:41:03ZCDS support team

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

cds-question@unistra.frsurveysmagellanic-cloudseclipsing-binary-starsThe advent of large scale multi-epoch surveys raises the need for automated light curve (LC) processing. This is particularly true for eclipsing binaries (EBs), which form one of the most populated types of variable objects. The Gaia mission, launched at the end of 2013, is expected to detect of the order of few million EBs over a 5-year mission. We present an automated procedure to characterize EBs based on the geometric morphology of their LCs with two aims: first to study an ensemble of EBs on a statistical ground without the need to model the binary system, and second to enable the automated identification of EBs that display atypical LCs. We model the folded LC geometry of EBs using up to two Gaussian functions for the eclipses and a cosine function for any ellipsoidal-like variability that may be present between the eclipses. The procedure is applied to the OGLE-III data set of EBs in the Large Magellanic Cloud (LMC) as a proof of concept. The bayesian information criterion is used to select the best model among models containing various combinations of those components, as well as to estimate the significance of the components. Based on the two-Gaussian models, EBs with atypical LC geometries are successfully identified in two diagrams, using the Abbe values of the original and residual folded LCs, and the reduced chi^2^. Cleaning the data set from the atypical cases and further filtering out LCs that contain non-significant eclipse candidates, the ensemble of EBs can be studied on a statistical ground using the two-Gaussian model parameters. For illustration purposes, we present the distribution of projected eccentricities as a function of orbital period for the OGLE-III set of EBs in the LMC, as well as the distribution of their primary versus secondary eclipse widths.2017A&A...606A..92Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/606/A92CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)J/AcA/61/103 : OGLE IIII LMC eclipsing binaries (Graczyk+, 2011)J/MNRAS/443/432 : Eclipsing binaries in LMC (Muraveva+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/606/A92https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/606/A92http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/606/A92https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/606/A92https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/606/A92http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/606/A92GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/606/A92/o3lmcebs (Attributes of the two-Gaussian models fitted to the folded light curves of OGLE-III eclipsing binaries of the Large Magellanic Cloud)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/606/A92/o3lmcebs?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/606/A92/o3lmcebs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/606/A92/o3lmcebs?GETtext/xml+votable180.050000true67.3501667-69.76483330.0055555555555555564/2068 5/8261 8263 8268-8269 8271 8276 8280 9376 9378 6/33049 33051 33069 33080-33081 33083 33112 33124-33126 33128-33130 37416 37418 37536 37538https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/606/A92?format=asciidefaultJ/A+A/606/A92/o3lmcebsAttributes of the two-Gaussian models fitted to the folded light curves of OGLE-III eclipsing binaries of the Large Magellanic Cloud_RARight Ascension (J2000) from J/AcA/61/103/ecldegpos.eq.ra;meta.mainindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOGLE-III eclipsing binary source ID in the LMC (sourceId)meta.id;meta.mainintPerOrbital period (period)dtime.perioddoubleModelAdopted two-Gaussian model (model) (1)stat.param;meta.modelledcharNparamNumber of parameters in the two-Gaussian model (numParams)meta.numberintEpoch1Epoch of primary minimum (HJD-2450000) (primaryEpoch)dtime.epochdoublecstValue of the constant in the two-Gaussian model (cst)magstat.paramdoublee_cstUncertainty on cst (cstErr)magstat.errordoublemu1? Phase of primary eclipse minimum (mu1)time.phasedoublenullablee_mu1? Uncertainty on mu1 (mu1Err)stat.errordoublenullablesigma1? Gaussian width, in phase, of the primary eclipse (sigma1)src.var.amplitudedoublenullablee_sigma1? Uncertainty on sigma1 (sigma1Err)stat.errordoublenullabled1? Gaussian depth of the primary eclipse (d1)magphys.absorption.opticalDepthdoublenullablee_d1? Uncertainty on d1 (d1Err)magstat.errordoublenullablemu2? Phase of secondary minimum (mu2)time.phasedoublenullablee_mu2? Uncertainty on mu2 (mu2Err)stat.errordoublenullablesigma2? Gaussian width, in phase, of the secondary eclipse (sigma2)src.var.amplitudedoublenullablee_sigma2? Uncertainty on sigma2 (sigma2Err)stat.errordoublenullabled2? Gaussian depth of the secondary eclipse (d2)magphys.absorption.opticalDepthdoublenullablee_d2? Uncertainty on d2 (d2Err)magstat.errordoublenullablePhaseCEC? Phase of cosine function for the ellipsoidal component (muForCosHalfP)phys.luminosity.fundoublenullableACEC? Amplitude of cosine function for the ellipsoidal component (aCosHalfP)magphot.magdoublenullablee_ACEC? Uncertainty on aCosHalfP (aCosHalfPErr)magstat.errordoublenullableWidth1? Primary eclipse duration in phase (width1)time.intervaldoublenullableDepth1? Primary eclipse depth (depth1)magphys.absorption.opticalDepthdoublenullableWidth2? Secondary eclipse duration in phase (width2)time.intervaldoublenullableDepth2? Secondary eclipse depth (depth2)magphys.absorption.opticalDepthdoublenullablemaxPhaseGapLargest phase gap in folded light curve (maxPhaseGap)time.phasedoublePhaseClumPhase clumpiness (phaseClumpiness)stat.paramdoublephaseCovE1? Phase coverage of primary eclipse (phaseCoverageEcl1)stat.paramdoublenullablephaseCovE2? Phase coverage of secondary eclipse (phaseCoverageEcl2)stat.paramdoublenullablesigniE1? Significance of primary eclipse (significance_ecl1)stat.fit.goodnessdoublenullablesigniE2? Significance of secondary eclipse (significance_ecl2)stat.fit.goodnessdoublenullablesigniEll? Significance of ellipsoidal-like variability (significance_ell)stat.fit.goodnessdoublenullableE1dOMMErr? Gaussian depth over mean measurement uncertainty for primary eclipse (ecl1_dOverMeanMagError)stat.error;phys.absorption.opticalDepth;stat.meandoublenullableE2dOMMErr? Gaussian depth over mean measurement uncertainty for secondary eclipse (ecl2_dOverMeanMagError)stat.error;phys.absorption.opticalDepth;stat.meandoublenullableabbeFlcAbbe value of the folded light curve (abbeFlc)stat.fit.paramdoubleabbeFlcResAbbe value of the residual folded light curve (abbeFlcResidual)stat.fit.paramdoublerChi2Reduced chi2 (reducedChi2)stat.fit.chi2doublebicCG12? Bayesian information criterion value of the CG12 model (bic_CG12)meta.notedoublenullablebicCG12E1? Bayesian information criterion value of the CG12E1 model (bic_CG12E1)meta.notedoublenullablebicCG12E2? Bayesian information criterion value of the CG12E2 model (bic_CG12E2)meta.notedoublenullablebicCG1? Bayesian information criterion value of the CG1 model (bic_CG1)meta.notedoublenullablebicCG1E1? Bayesian information criterion value of the CG1E1 model (bic_CG1E1)meta.notedoublenullablebicCG2? Bayesian information criterion value of the CG2 model (bic_CG2)meta.notedoublenullablebicCG2E2? Bayesian information criterion value of the CG2E2 model (bic_CG2E2)meta.notedoublenullablebicCE? Bayesian information criterion value of the CE model (bic_CE)meta.notedoublenullablebicCBayesian information criterion value of the C model (bic_C)meta.notedouble_DEDeclination (J2000) from J/AcA/61/103/ecldegpos.eq.dec;meta.mainindexed