J/ApJ/664/850ivo://CDS.VizieR/J/ApJ/664/850doi:10.26093/cds/vizier.16640850CDSMcQuinn K.B.W.Woodward C.E.Willner S.P.Polomski E.F.Gehrz R.D.,Humphreys R.M.van Loon J.T.Ashby M.L.N.Eicher K.Fazio G.G.2017-06-12T08:25:25Z2008-08-04T08:12:50ZCDS support team

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

cds-question@unistra.frgalaxiessurveysinfrared-photometryWe analyze five epochs of Spitzer Space Telescope Infrared Array Camera (IRAC) observations of the nearby spiral galaxy M33. Each epoch covered nearly a square degree at 3.6, 4.5, and 8.0um. The point-source catalog from the full data set contains 37650 stars. The stars have luminosities characteristic of the asymptotic giant branch and can be separated into oxygen-rich and carbon-rich populations by their [3.6]-[4.5] colors. The [3.6]-[8.0] colors indicate that over 80% of the stars detected at 8.0um have dust shells. Photometric comparison of epochs using conservative criteria yields a catalog of 2923 variable stars. These variables are most likely long-period variables amid an evolved stellar population. At least one-third of the identified carbon stars are variable.2007ApJ...664..850Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/664/850CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/121/870 : BVI photometry of Variables in M33 (Macri+, 2001)J/AJ/132/1361 : RR Lyrae variables in M33 (Sarajedini+, 2006)J/MNRAS/371/1405 : Variables in M33 (Hartman+, 2006)J/A+A/476/1161 : Spitzer photometry of M33 (Verley+, 2007)Table1 : Journal of Observations2004 Jan 09 16:01 3636224 17:17 36364802004 Jul 22 21:43 3638016 22:56 36377602004 Aug 16 03:02 3639040 04:15 36387842005 Jan 21 15:14 3640576 16:24 36403202005 Aug 25 03:00 13474048 04:13 134743042006 Jan 09 23:09 3649792 01:12 3650048Note: Inner and outer AORs refer to the two regions M33 was divided intohttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/664/850https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/664/850http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/664/850https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/664/850https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/664/850http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/664/850GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/664/850/M33 (Spitzer observations of stars in M33)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/664/850/M33?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/664/850/M33?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/664/850/M33?GETtext/xml+votable180.050000true23.0079480630.434258890.0055555555555555566/2154 2155 2240 22412.483060040379131e-20 5.517906024225661e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/664/850?format=asciiInfrareddefaultJ/ApJ/664/850/M33Spitzer observations of stars in M33recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSTM3307Source identification, JHHMMSS.ss+DDMMSS.smeta.id;meta.maincharn_SSTM3307Simbad column added by the CDSmeta.code;src.varchar3.6mag1? Epoch 1 IRAC 3.6um band magnitudemagphot.flux.density;em.IR.3-4umfloatnullablee_3.6mag1? The 1{sigma} error in 3.6mag1magstat.errorfloatnullable3.6mag2? Epoch 2 IRAC 3.6um band magnitudemagphot.flux.density;em.IR.3-4umfloatnullablee_3.6mag2? The 1{sigma} error in 3.6mag2magstat.errorfloatnullable3.6mag3? Epoch 3 IRAC 3.6um band magnitudemagphot.flux.density;em.IR.3-4umfloatnullablee_3.6mag3? The 1{sigma} error in 3.6mag3magstat.errorfloatnullable3.6mag4? Epoch 4 IRAC 3.6um band magnitudemagphot.flux.density;em.IR.3-4umfloatnullablee_3.6mag4? The 1{sigma} error in 3.6mag4magstat.errorfloatnullable3.6mag5? Epoch 5 IRAC 3.6um band magnitudemagphot.flux.density;em.IR.3-4umfloatnullablee_3.6mag5? The 1{sigma} error in 3.6mag5magstat.errorfloatnullable4.5mag1? Epoch 1 IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag1? The 1{sigma} error in 4.5mag1magstat.errorfloatnullable4.5mag2? Epoch 2 IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag2? The 1{sigma} error in 4.5mag2magstat.errorfloatnullable4.5mag3? Epoch 3 IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag3? The 1{sigma} error in 4.5mag3magstat.errorfloatnullable4.5mag4? Epoch 4 IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag4? The 1{sigma} error in 4.5mag4magstat.errorfloatnullable4.5mag5? Epoch 5 IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag5? The 1{sigma} error in 4.5mag5magstat.errorfloatnullable8.0mag1? Epoch 1 IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag1? The 1{sigma} error in 8.0mag1magstat.errorfloatnullable8.0mag2? Epoch 2 IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag2? The 1{sigma} error in 8.0mag2magstat.errorfloatnullable8.0mag3? Epoch 3 IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag3? The 1{sigma} error in 8.0mag3magstat.errorfloatnullable8.0mag4? Epoch 4 IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag4? The 1{sigma} error in 8.0mag4magstat.errorfloatnullable8.0mag5? Epoch 5 IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag5? The 1{sigma} error in 8.0mag5magstat.errorfloatnullable<3.6>? Mean IRAC 3.6um band magnitudemagphot.flux.density;em.IR.3-4umfloatnullable<4.5>? Mean IRAC 4.5um band magnitudemagphot.mag;em.IR.4-8umfloatnullable<8.0>? Mean IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullable3.6-4.5? The IRAC (3.6-4.5) color indexmagphot.color;em.IR;em.IRfloatnullable3.6-8.0? The IRAC (3.6-8.0) color indexmagphot.color;em.IR;em.IRfloatnullable3.6Amp? Amplitude in IRAC 3.6um band (1)magphot.mag;em.IR.3-4umfloatnullable4.5Amp? Amplitude in IRAC 4.5um band (1)magphot.mag;em.IR.4-8umfloatnullable8.0Amp? Amplitude in IRAC 8.0um band (1)magphot.mag;em.IR.4-8umfloatnullableRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main