II/295ivo://CDS.VizieR/II/295CDSRamirez S.V.Arendt R.G.Sellgren K.Stolovy S.R.Cotera A.,Smith H.A.Yusef-Zadeh F.2017-06-01T08:53:12Z2010-04-23T10:50:36ZCDS support team

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

cds-question@unistra.frastronomical-object-identificationsurveysinfrared-photometryWe have obtained Spitzer IRAC observations of the central 2.0{deg}x1.4{deg} (~280x200pc) of the Galaxy at 3.6-8.0um. A point-source catalog of 1065565 objects is presented. The catalog includes magnitudes for the point sources at 3.6, 4.5, 5.8, and 8.0um, as well as JHKs photometry from Two Micron All Sky Survey (2MASS). The point-source catalog is confusion limited with average limits of 12.4, 12.1, 11.7, and 11.2mag for [3.6], [4.5], [5.8], and [8.0], respectively. We find that the confusion limits are spatially variable because of stellar surface density, background surface brightness level, and extinction variations across the survey region. The overall distribution of point-source density with Galactic latitude and longitude is essentially constant, but structure does appear when sources of different magnitude ranges are selected. Bright stars show a steep decreasing gradient with Galactic latitude and a slow decreasing gradient with Galactic longitude, with a peak at the position of the Galactic center. From IRAC color-magnitude and color-color diagrams, we conclude that most of the point sources in our catalog have IRAC magnitudes and colors characteristic of red giant and asymptotic giant branch (AGB) stars.2008ApJS..175..147Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/II/295CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/293 : GLIMPSE Source Catalog (I+II+3D) (IPAC 2008)J/A+AS/97/587 : JHK photometry of Galactic center stars (Ruelas-Mayorga+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=II/295https://vizier.iucaa.in/viz-bin/VizieR-2?-source=II/295http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/295https://vizier.cds.unistra.fr/viz-bin/votable?-source=II/295https://vizier.iucaa.in/viz-bin/votable?-source=II/295http://vizieridia.saao.ac.za/viz-bin/votable?-source=II/295GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table II/295/SSTGC (2MASS/IRAC catalog of the Galactic Center)https://vizier.cds.unistra.fr/viz-bin/conesearch/II/295/SSTGC?https://vizier.iucaa.in/viz-bin/conesearch/II/295/SSTGC?http://vizieridia.saao.ac.za/viz-bin/conesearch/II/295/SSTGC?GETtext/xml+votable180.050000true265.043875-29.5470.005555555555555556Cone search capability for table II/295/GC-IRAC (Galactic Center IRAC source list)https://vizier.cds.unistra.fr/viz-bin/conesearch/II/295/GC-IRAC?https://vizier.iucaa.in/viz-bin/conesearch/II/295/GC-IRAC?http://vizieridia.saao.ac.za/viz-bin/conesearch/II/295/GC-IRAC?GETtext/xml+votable180.050000true265.046125-29.349250.005555555555555556Spitzer5/7206 7207 6/28848 28849 28852 288538.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/II/295?format=asciiInfrareddefaultII/295/SSTGC2MASS/IRAC catalog of the Galactic CenterM/N2Channel 2 M/N ratio (5)instr.saturationfloatSNR4? Channel 4 signal-to-noisestat.snrdoublenullableSSTGCSource identificationmeta.id;meta.mainintprimaryindexedRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainindexedDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainindexedGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latdouble2+1[0,1] satisfies the "2+1" criterion flag (1)meta.code.qual;phot.fluxintloc[0,3] Note about source location (2)meta.noteint2MASS2MASS identification (HHMMSSss+DDMMSSsA)meta.idcharJmag? 2MASS J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H band magnitudemagphot.mag;em.IR.Hdoublenullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag? 2MASS K_S_ band magnitudemagphot.mag;em.IR.Kdoublenullablee_Ksmag? Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullableq2M[ABCDEFUXZ] 2MASS quality flag in J H K (3)meta.notecharID1? Identification in Channel 1 (3.6um)meta.idintnullable3.6mag? Channel 1 magnitude at 3.6ummagphot.mag;em.IR.3-4umfloatnullablee_3.6mag? Uncertainty in 3.6magmagstat.errorfloatnullableSNR1? Channel 1 signal-to-noisestat.snrdoublenullablef1[0,4] Channel 1 flag (4)meta.codeintN1Channel 1 Coverage (#frames at source position)meta.numberintM/N1Channel 1 M/N ratio (5)instr.saturationfloatID2? Identification in Channel 2 (4.5um)meta.idintnullable4.5mag? Channel 2 magnitude at 4.5ummagphot.mag;em.IR.4-8umfloatnullablee_4.5mag? Uncertainty in 4.5magmagstat.errorfloatnullableSNR2? Channel 2 signal-to-noisestat.snrdoublenullablef2[0,4] Channel 2 flag (4)meta.codeintN2Channel 2 Coverage (#frames at source position)meta.numberintID3? Identification in Channel 3 (5.8um)meta.idintnullable5.8mag? Channel 3 magnitude at 5.8ummagphot.flux.density;em.IR.4-8umfloatnullablee_5.8mag? Uncertainty in 5.8magmagstat.errorfloatnullableSNR3? Channel 3 signal-to-noisestat.snrdoublenullablef3[0,4] Channel 3 flag (4)meta.codeintN3Channel 3 Coverage (#frames at source position)meta.numberintM/N3Channel 3 M/N ratio (5)instr.saturationfloatID4? Identification in Channel 4 (8.0um)meta.idintnullable8.0mag? Channel 4 magnitude at 8.0ummagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag? Uncertainty in 8.0magmagstat.errorfloatnullablef4[0,4] Channel 4 flag (4)meta.codeintN4Channel 4 Coverage (#frames at source position)meta.numberintM/N4Channel 4 M/N ratio (5)instr.saturationfloatID6Name from table6 (sub-array photometry) (6)meta.idcharIRACDisplay the fluxes from source listsmeta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharII/295/GC-IRACGalactic Center IRAC source listIDSource identification number (the first digit represents the channel)meta.id;meta.mainintprimaryRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainindexedDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainindexedGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latdoubleFluxFlux density in the channel wavelengthmJyphot.flux.density;em.IRdoublee_FluxUncertainty in FluxmJystat.error;phot.fluxdoubleNNumber of observations of sourcemeta.numberintS/NSignal-to-noise ratiostat.snrdoubleMethMethod used to compute the flux (2)meta.code;obschar