J/ApJS/160/450ivo://CDS.VizieR/J/ApJS/160/450doi:10.26093/cds/vizier.21600450CDSFlaccomio E.Micela G.Sciortino S.Feigelson E.D.Herbst W.,Favata F.Harnden F.R.JRVrtilek S.D.2017-12-18T07:57:00Z2010-12-08T10:04:51ZCDS support team

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

cds-question@unistra.frx-ray-sourcesopen-star-clusterspre-main-sequence-starsline-intensitiesWe investigate the spatial distribution of X-ray-emitting plasma in a sample of young Orion Nebula Cluster stars by modulation of their X-ray light curves due to stellar rotation. The study, part of the Chandra Orion Ultradeep Project (COUP, Cat. <J/ApJS/160/319>), is made possible by the exceptional length of the observation: 10 days of ACIS integration during a time span of 13 days, yielding a total of 1616 detected sources in the 17'x17' field of view. We here focus on a subsample of 233 X-ray-bright stars with known rotational periods. We search for X-ray modulation using the Lomb Normalized Periodogram method.2005ApJS..160..450Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/160/450CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)J/A+A/396/513 : Stellar Rotation in the Orion Nebula Cluster (Herbst+, 2002)J/AJ/117/2941 : Rotation periods of Orion PMS stars (Stassun+, 1999)J/AJ/121/3160 : JHK photometry near the Trapezium region (Carpenter+, 2001)J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)J/ApJ/582/382 : Chandra X-ray sources in Orion Nebula Clusterhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/160/450https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/160/450http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/160/450https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/160/450https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/160/450http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/160/450GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/160/450/table1 (COUP sources with assigned rotational period.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/160/450/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/160/450/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/160/450/table1?GETtext/xml+votable180.050000true83.639875-5.36911110.0055555555555555566/21438 21439 22804 22805https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/160/450?format=asciiX-raydefaultJ/ApJS/160/450/table1COUP sources with assigned rotational period.n_PerNote on Per (2)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCOUPThe COUP source numbermeta.idintCtsNet (background subtracted) ACIS countsctphot.count;em.X-rayintOptId? Optical identification (1)meta.id.crossintnullablem_OptId[ab] Multiplicity indicator (1)meta.code.multipcharPerOptically determined rotation perioddtime.periodfloatr_PerReference for Per (3)meta.ref;pos.framecharMass? Stellar masssolMassphys.massfloatnullableLogAge? Log of the stellar agelog(yr)time.agefloatnullableLogLx? Log of the X-ray luminosity in erg/slog(1e-07W)phys.luminosity;em.X-rayfloatnullableLog(Lx/Lb)? Log of the X-ray to bolometric luminosity ratiophys.luminosity;arith.ratiofloatnullableWCaII? Ca II line equivalent width in Angstroms0.1nmspect.line.eqWidthfloatnullableModThe X-ray modulation flag (4)meta.codecharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main