J/AJ/137/3139ivo://CDS.VizieR/J/AJ/137/3139doi:10.26093/cds/vizier.51373139CDSVijh U.P.Meixner M.Babler B.Block M.Bracker S.Engelbracht C.W.,For B.Gordon K.Hora J.Indebetouw R.Leitherer C.Meade M.,Misselt K.Sewilo M.Srinivasan S.Whitney B.2017-12-07T07:26:56Z2011-10-04T13:51:40ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsinfrared-sourcesinfrared-photometryWe present initial results and source lists of variable sources in the Large Magellanic Cloud (LMC) for which we detect thermal infrared variability from the Surveying the Agents of a Galaxy's Evolution (SAGE) survey, which had two epochs of photometry separated by 3 months. The SAGE survey mapped a 7{deg}x7{deg} region of the LMC using the Infrared Array Camera (IRAC) and the MIPS instruments on board Spitzer. Variable sources are identified using a combination of the IRAC 3.6, 4.5, 5.8, 8.0um bands and the MIPS 24um bands. An error-weighted flux difference between the two epochs is used to assess the variability. Of the ~3 million sources detected at both epochs, we find ~2000 variable sources for which we provide electronic catalogs. Most of the variable sources can be classified as asymptotic giant branch (AGB) stars. A large fraction (>66%) of the extreme AGB stars are variable and only smaller fractions of carbon-rich (6.1%) and oxygen-rich (2.0%) stars are detected as variable sources. We also detect a population of variable young stellar object candidates.2009AJ....137.3139Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/137/3139CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/99/784 : IR photometry of LMC long-period variables (Hughes+ 1990)J/A+A/303/137 : EROS Variables: Cepheids in the bar of LMC (Beaulieu+ 1995)J/AJ/114/326 : MACHO Variables V. (Alcock+ 1997)J/A+A/344/521 : LMC variable X-ray sources (Haberl+, 1999)J/A+A/462/599 : JHKs photometry of LMC cluster Cepheids (Testa+, 2007)J/AcA/51/317 : OGLE DIA. Catalog of LMC and SMC images (Zebrun+, 2001)J/AJ/124/2039 : LMC blue variable stars from MACHO (Keller+, 2002)J/MNRAS/330/137 : LMC long-period red variables VRc observations (Noda+, 2002)J/AJ/136/1242 : LMC long-period variables from MACHO (Fraser+, 2008)J/AJ/135/726 : Spitzer SAGE observations of LMC PNe (Hora+, 2008)J/AJ/136/18 : LMC SAGE. New candidate YSOs (Whitney+, 2008)J/PASP/122/683 : SAGE-Spec Spitzer legacy program (Kemper+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/137/3139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/137/3139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/137/3139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/137/3139https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/137/3139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/137/3139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/137/3139/table2 (*Properties of the 1967 SAGE Variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/137/3139/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/137/3139/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/137/3139/table2?GETtext/xml+votable180.050000true79.9337-69.9940.0055555555555555564/2068 5/8262 8263 8268 8269 8270 8276 8277 8278 8280 8281 8284 6/33043 33046 33047 33084 33085 33086 33116 33117 33118 33128 33129 33132 33140 37536 37538 37544 375466.772611666688002e-21 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/137/3139?format=asciiInfrareddefaultJ/AJ/137/3139/table2*Properties of the 1967 SAGE VariablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSTISAGEIRAC designation (SSTISAGE1C JHHMMSS.ss+DDMMSS.s or SSTISAGE2C JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharSSTM1SAGEMIPS designation (SSTM1SAGE1 JHHMMSS.ss+DDMMSS.s or SSTM1SAGE2 JHHMMSS.ss+DDMMSS.s)meta.id.crosscharEp[1/2] Epochmeta.codeintcl[COUXY] Source classification (1)meta.code.classcharF3.6? Spitzer/IRAC 3.6{mu}m flux densitymJyphot.mag;em.IR.3-4umfloatnullablee_F3.6? Error in F3.6mJystat.errorfloatnullableV3.6? Variability index at 3.6 microns (2)src.var.indexfloatnullablef3.6[-2/2]? Fractional flux at 3.6 microns (3)phot.flux;arith.ratiofloatnullableF4.5? Spitzer/IRAC 4.5{mu}m flux densitymJyphot.mag;em.IR.4-8umfloatnullablee_F4.5? Error in F4.5mJystat.errorfloatnullableV4.5? Variability index at 4.5 microns (2)src.var.indexfloatnullablef4.5[-2/2]? Fractional flux at 4.5 microns (3)phot.flux;arith.ratiofloatnullableF5.8? Spitzer/IRAC 5.8{mu}m flux densitymJyphot.flux.density;em.IR.4-8umfloatnullablee_F5.8? Error in F5.8mJystat.errorfloatnullableV5.8? Variability index at 5.8 microns (2)src.var.indexfloatnullablef5.8[-2/2]? Fractional flux at 5.8 microns (3)phot.flux;arith.ratiofloatnullableF8.0? Spitzer/IRAC 8.0{mu}m flux densitymJyphot.flux.density;em.IR.8-15umfloatnullablee_F8.0? Error in F8.0mJystat.errorfloatnullableV8.0? Variability index at 8.0 microns (2)src.var.indexfloatnullablef8.0[-2/2]? Fractional flux at 8.0 microns (3)phot.flux;arith.ratiofloatnullableF24? Spitzer/MIPS 24{mu}m flux densitymJyphot.flux.density;em.IR.15-30umfloatnullablee_F24? Error in F24mJystat.errorfloatnullableV24? Variability index at 24 microns (2)src.var.indexfloatnullablef24[-2/2]? Fractional flux at 24 microns (3)phot.flux;arith.ratiofloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main