J/A+A/530/A150ivo://CDS.VizieR/J/A+A/530/A150doi:10.26093/cds/vizier.35300150CDSFranciosini E.Sacco G.G.2025-08-05T20:00:16Z2011-11-10T14:30:40ZCDS support team

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

cds-question@unistra.fropen-star-clustersx-ray-sourcesinfrared-photometryvisible-astronomybroad-band-photometryWe studied the X-ray properties of the young (~1-8Myr) open cluster around the hot (O8 III) star {lambda} Ori and compared them with those of the similarly-aged sigma Ori cluster to investigate possible effects of the different ambient environment. We analysed an XMM-Newton observation of the cluster using EPIC imaging and low-resolution spectral data. We studied the variability of detected sources, and performed a spectral analysis of the brightest sources in the field using multi-temperature models.2011A&A...530A.150Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/530/A150CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/118/2409 : VRI photometry of lambda Ori PMS stars (Dolan+, 1999)J/AJ/123/387 : VRI photometry of lambda Ori star-forming region (Dolan+ 2002)J/ApJ/610/1064 : lambda Ori substellar population (Barrado y Navascues+ 2004)J/ApJ/664/481 : Collinder 69 optical/IR photometry (Barrado y Navascues+ 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/530/A150https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/530/A150http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/530/A150https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/530/A150https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/530/A150http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/530/A150GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/530/A150/tablea1 (X-ray sources detected in the {lambda} Ori cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A150/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A150/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A150/tablea1?GETtext/xml+votable180.050000true83.528583310.01688890.005555555555555556Cone search capability for table J/A+A/530/A150/tablea2 (3{sigma} upper limits and optical properties of undetected cluster members and candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A150/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A150/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A150/tablea2?GETtext/xml+votable180.050000true83.76258339.93463890.0055555555555555566/23717 237287.952274030004205e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/530/A150?format=asciiX-rayOpticalInfrareddefaultJ/A+A/530/A150/tablea1X-ray sources detected in the {lambda} Ori clusterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOmeta.ref.urlcharLOXSequential numbermeta.id;meta.mainintprimaryRAJ2000X-ray right ascension (J2000)pos.eq.ra;meta.mainDEJ2000X-ray declination (J2000)pos.eq.dec;meta.mainOffaxisOffaxisarcmininstr.offsetfloatSigniDetection significancestat.fit.goodness;instr.saturationfloatCRateMOS-equivalent count rates in the 0.3-7.8keV bandct/ksphot.count;em.X-rayfloate_CRaterms uncertainty on CRatect/ksstat.errorfloatIdentCross-dentification (G1)meta.id.assoccharn_Ident[e] Binarity (2)meta.notecharOffset? Offset between X-ray source and optical identificationarcsecpos;arith.difffloatnullableMembNotes about membership (3)meta.code.membercharJ/A+A/530/A150/table1X-ray and optical properties of sources identified with known cluster members and candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLOXSequential numbermeta.id;meta.mainintIdentIdentification (G1)meta.id.assoccharlogLXX-ray luminosity in the 0.3-8keV bandlog(1e-07W)phys.luminosity;em.X-rayfloatn_logLX[*] * when derived from spectral fitsmeta.notecharlogX/bX-ray-to-bolometric luminosity ratiophys.luminosity;arith.ratiofloatVmag? V magnitudemagphot.mag;em.opt.VfloatnullableRmag? R magnitudemagphot.mag;em.opt.RfloatnullableImag? I magnitudemagphot.mag;em.opt.IfloatnullableJmag? J magnitudemagphot.mag;em.IR.JfloatnullableHmag? H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? Ks magnitudemagphot.mag;em.IR.KfloatnullableMass? MasssolMassphys.massfloatnullableSpTypeMK spectral typesrc.spTypecharDiscDisc classification (G2)src.classcharMm[s] Membership code (G3)meta.code.membercharJ/A+A/530/A150/table2X-ray sources identified with possible new cluster candidatesRmag? R magnitude (1)magphot.mag;em.opt.Rfloatnullablen_Rmag[*] Note on Rmag (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLOXSequential numbermeta.id;meta.mainint2MASS2MASS name (JHHMMSSss+DDMMSSs)meta.id.assoccharVmag? V magnitude (1)magphot.mag;em.opt.VfloatnullableImag? I magnitude (1)magphot.mag;em.opt.Ifloatnullablen_Imag[*] Note on Imag (1)meta.notecharJmag? J magnitudemagphot.mag;em.IR.JfloatnullableHmag? H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? Ks magnitudemagphot.mag;em.IR.KfloatnullablelogLXX-ray luminosity in the 0.3-7.8keV band assuming d=400pclog(1e-07W)phys.luminosity;em.X-rayfloatn_logLX[*] * when derived from spectral fitsmeta.notecharf_logLX[d] d when X-ray luminosity has been equally divided between the two stars (see text)meta.codecharlogX/bX-ray-to-bolometric luminosity ratio (2)phys.luminosity;arith.ratiofloatMass? Estimated mass (2)solMassphys.massfloatnullableJ/A+A/530/A150/tablea23{sigma} upper limits and optical properties of undetected cluster members and candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIdentIdentification (G1)meta.id;meta.maincharl_CRateLimit flag on CRatemeta.code.errorcharCRateMOS-equivalent count rates in the 0.3-7.8keV band upper limit (1)ct/ksphot.count;em.X-rayfloatl_logLXLimit flag on logLXmeta.code.errorcharlogLXX-ray luminosity in the 0.3-8keV band (upper limit)log(1e-07W)phys.luminosity;em.X-rayfloatl_logX/bLimit flag on logX/bmeta.code.errorcharlogX/bX-ray-to-bolometric luminosity ratio (upper limit)phys.luminosity;arith.ratiofloatVmag? V magnitudemagphot.mag;em.opt.VfloatnullableRmag? R magnitudemagphot.mag;em.opt.RfloatnullableImag? I magnitudemagphot.mag;em.opt.IfloatnullableJmag? J magnitudemagphot.mag;em.IR.JfloatnullableHmag? H magnitudemagphot.mag;em.IR.HfloatnullableKsmag? Ks magnitudemagphot.mag;em.IR.KfloatnullableMass? MasssolMassphys.massfloatnullableSpTypeMK spectral typesrc.spTypecharDiscDisc classification (G2)src.classcharMm[s] Membership code (G3)meta.code.membercharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSimbadNameSimbad column added by the CDSmeta.idcharnullable