J/A+A/446/501ivo://CDS.VizieR/J/A+A/446/501doi:10.26093/cds/vizier.34460501CDSFranciosini E.Pallavicini R.Sanz-Forcada J.2017-07-11T13:09:15Z2007-02-07T21:50:05ZCDS support team

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

cds-question@unistra.fropen-star-clustersx-ray-sourcespre-main-sequence-starsinfrared-photometryWe present the results of an XMM-Newton observation of the young (~2-4Myr) cluster around the hot star sigma Orionis. In a previous paper (Sanz-Forcada et al., 2004A&A...421..715S) we presented the analysis of the RGS spectrum of the central hot star; here we discuss the results of the analysis of the full EPIC field. We have detected 175 X-ray sources, 88 of which have been identified with cluster members, including very low-mass stars down to the substellar limit. We detected eleven new possible candidate members from the 2MASS (Cat. <II/246>) catalogue.2006A&A...446..501Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/446/501CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2002)IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003)J/A+A/419/249 : RJHKs photometry of sigma Ori low-mass stars (Scholz+, 2004)J/AJ/128/2316 : BVRIJHKs photometry in sigma Ori cluster (Sherry+, 2004)J/MNRAS/356/89 : sigma Ori low-mass stars (Kenyon+, 2005)J/MNRAS/356/1583 : sigma Ori low-mass candidate members RV (Burningham+, 2005)J/AN/325/705 : RIJHKs of low-mass stars in sigma Ori (Bejar+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/446/501https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/446/501http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/446/501https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/446/501https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/446/501http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/446/501GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/446/501/xray (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/446/501/xray?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/446/501/xray?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/446/501/xray?GETtext/xml+votable180.050000true84.4650833-2.58988890.005555555555555556Cone search capability for table J/A+A/446/501/nox (3{sigma} upper limits for undetected late-type cluster members or candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/446/501/nox?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/446/501/nox?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/446/501/nox?GETtext/xml+votable180.050000true84.5595833-2.41819440.0055555555555555566/22851 22854https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/446/501?format=asciiX-rayInfrareddefaultJ/A+A/446/501/xrayCombined table from original tablesf_NX[*] Note on NX (1)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_NXSimbad column added by the CDSmeta.notecharNXX-ray sources running identification number, [FPS2006] NX NNN in Simbadmeta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSignSignificance of detectionstat.likelihood;obsfloatCRCount ratect/ksphot.count;em.X-rayfloate_CRrms uncertainty on CRct/ksstat.errorfloatOptIDOptical ID (G1)meta.id.crosscharn_OptID[cde] Note on OptID (2)meta.notecharDr? Offset between X-ray and optical sourcearcsecpos.angDistancefloatnullableImag? I magnitudemagphot.mag;em.opt.IfloatnullableR-I? R-I colour indexmagphot.color;em.opt.R;em.opt.IfloatnullableI-J? I-J colour indexmagphot.color;em.IR;em.IRfloatnullableSpTypeMK spectral type (3)src.spTypecharr_SpType[*] *: spectral types from the literaturemeta.bibcharlogLX? Unabsorbed X-ray luminosity in the 0.3-8keV bandlog(Sun)phys.luminosity;em.X-rayfloatnullablen_logLX[+] Note on X-ray luminosity (4)meta.notecharC/WProbable/possible CTTS or WTTS flag (G2)meta.codecharJ/A+A/446/501/nox3{sigma} upper limits for undetected late-type cluster members or candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (G1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainImagI magnitudemagphot.mag;em.opt.IfloatR-I? R-I colour indexmagphot.color;em.opt.R;em.opt.IfloatnullableI-J? I-J colour indexmagphot.color;em.IR;em.IRfloatnullableSpTypeMK spectral typesrc.spTypecharr_SpType[*] *: spectral types from the literaturemeta.bibcharC/WProbable/possible CTTS or WTTS flag (G2)meta.codecharl_CRLimit flag on CRmeta.code.errorcharCRCount rate (2)ct/ksphot.count;em.X-rayfloatl_logLXLimit flag on logLXmeta.code.errorcharlogLX? Unabsorbed X-ray luminosity in the 0.3-8keV bandlog(Sun)phys.luminosity;em.X-rayfloatnullable