J/ApJ/662/1067ivo://CDS.VizieR/J/ApJ/662/1067doi:10.26093/cds/vizier.16621067CDSHernandez J.Hartmann L.Megeath T.Gutermuth R.Muzerolle J.,Calvet N.Vivas A.K.Briceno C.Allen L.Stauffer J.Young E.,Fazio G.2023-12-19T10:31:37Z2009-07-09T04:05:41ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-sourcesinfrared-photometryWe report new Spitzer Space Telescope observations, using the IRAC and MIPS instruments, of the young (~3Myr) sigma Orionis cluster. We identify 336 stars as members of the cluster, using optical and near-infrared color-magnitude diagrams. Using the spectral energy distribution slopes in the IRAC spectral range, we place objects into several classes: non-excess stars, stars with optically thick disks (such as classical T Tauri stars), class I (protostellar) candidates, and stars with "evolved disks"; the last exhibit smaller IRAC excesses than optically thick disk systems. In general, this classification agrees with the location expected in IRAC-MIPS color-color diagrams for these objects.2007ApJ...662.1067Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/662/1067CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/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/AN/325/740 : Astrophysical supplements to ASCC-2.5 (Kharchenko+, 2004)J/AN/325/705 : RIJHKs of low-mass stars in sigma Ori (Bejar+, 2004)J/AJ/129/907 : New Ori OB1 members (Briceno+, 2005)J/MNRAS/356/89 : sigma Ori low-mass stars (Kenyon+, 2005)J/MNRAS/356/1583 : RV of sigma Ori low-mass candidate memb. (Burningham+, 2005)J/A+A/446/501 : XMM observations of sigma Ori cluster (Franciosini+, 2006)J/A+A/466/917 : Brightest stars of sigma Orionis cluster (Caballero+, 2007)J/A+A/478/667 : The Mayrit catalogue (Caballero, 2008)J/A+A/488/167 : Low-mass stars in {sigma} Ori and {lambda} Ori (Sacco+ 2008)J/MNRAS/385/2210 : Spectroscopy around lam Ori and sig Ori (Maxted+, 2008)J/A+A/493/931 : Sigma Ori MAD observations (Bouy+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/662/1067https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/662/1067http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/662/1067https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/662/1067https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/662/1067http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/662/1067GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/662/1067/sigOri (Stars observed with Spitzer in {sigma} Ori cluster (tables 1 and 2 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/662/1067/sigOri?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/662/1067/sigOri?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/662/1067/sigOri?GETtext/xml+votable180.050000true84.32781-2.672750.0055555555555555566/22851 22854 228606.772611666688002e-21 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/662/1067?format=asciiInfrareddefaultJ/ApJ/662/1067/sigOriStars observed with Spitzer in {sigma} Ori cluster (tables 1 and 2 of paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[HHM2007]Identification numbermeta.id;meta.mainintprimaryMmmeta.code.membercharDiskDisk classification (4)meta.code.class;src.classcharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main3.6magSpitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloate_3.6magUncertainty in 3.6magmagstat.errorfloat4.5magSpitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloate_4.5magUncertainty in 4.5magmagstat.errorfloat5.8magSpitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloate_5.8magUncertainty in 5.8magmagstat.errorfloat8.0magSpitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloate_8.0magUncertainty in 8.0magmagstat.errorfloat24mag? Spitzer/MIPS 24.0 micron band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_24mag? Uncertainty in 24.0magmagstat.errorfloatnullableVmag? The V band magnitude (only for table1)magphot.mag;em.opt.Vfloatnullablee_Vmag? Uncertainty in Vmag (only for table1)magstat.error;phot.magfloatnullabler_VmagReference (only for table1) (1)meta.ref;pos.framecharV[0/1]? 1=variable, 0=non-variable (table1 only)meta.codeintnullableX[0/1]? 1=X-ray emission (able1 only)meta.codeintnullablef_Disk[1/6]? Discrepancy in disk classification (5)meta.codeintnullableRefsKnown member reference(s) (only for table1) (1)meta.ref;pos.framechar