J/ApJ/660/704ivo://CDS.VizieR/J/ApJ/660/704doi:10.26093/cds/vizier.16600704CDSStassun K.G.Van Den Berg M.Feigelson E.2017-09-22T16:15:53Z2009-04-14T20:52:37ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsx-ray-sourcesWe present a statistical analysis of simultaneous optical and X-ray light curves, spanning 600ks, for 814 pre-main-sequence (PMS) stars in the Orion Nebula Cluster. The aim of this study is to establish the relationship, if any, between the sites of optical and X-ray variability and thereby to elucidate the origins of X-ray production in PMS stars.2007ApJ...660..704Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/660/704CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)J/AJ/116/1816 : JHKLMNOPQ photometry in Orion cluster (Hillenbrand+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/660/704https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/660/704http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/660/704https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/660/704https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/660/704http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/660/704GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/660/704/table1 (Optical and X-Ray Variability in Study Sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/660/704/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/660/704/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/660/704/table1?GETtext/xml+votable180.050000true83.6592811-5.40653390.0055555555555555566/21438 21439 22804 22805https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/660/704?format=asciiX-raydefaultJ/ApJ/660/704/table1Optical and X-Ray Variability in Study SamplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCOUPThe COUP identification number (J/ApJS/160/319)meta.id;meta.mainintOptIDOptical identification from COUP (1)meta.id.crosscharJThe J-statistic value (see section 2.1.2)stat.probabilityfloatl_logP[<= ] Limit flag on logPmeta.code.errorcharlogPK-S test probability of X-ray variability (2)stat.probability;src.varfloatBBRatio of max/min X-ray flux from BB analysis (3)phot.flux;arith.ratiofloatCa2? The CaII IR triplet equivalent width (4)0.1nmspect.line.eqWidth;em.IRfloatnullableSimbadSimbad column added by the CDSchar_RAPosition from the COUP catalog (Getman et al. 2005, Cat. J/ApJS/160/319) (right ascension part)degpos.eq.ra;meta.main_DEPosition from the COUP catalog (Getman et al. 2005, Cat. J/ApJS/160/319) (declination part)degpos.eq.dec;meta.main