J/ApJ/701/508ivo://CDS.VizieR/J/ApJ/701/508doi:10.26093/cds/vizier.17010508CDSKozlowski S.Kochanek C.S.2017-06-30T05:49:08Z2011-10-04T14:09:38ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiinfrared-photometrymagellanic-cloudsWe show that using mid-IR color selection to find active galactic nuclei (AGNs) is as effective in dense stellar fields such as the Magellanic Clouds as it is in extragalactic fields with low stellar densities using comparisons between the Spitzer Deep Wide Field Survey data for the NOAO Deep Wide Field Survey Bootes region and the SAGE Survey of the Large Magellanic Cloud. We use this to build high-purity catalogs of ~5000 AGN candidates behind the Magellanic Clouds. Once confirmed, these quasars will expand the available astrometric reference sources for the Clouds and the numbers of quasars with densely sampled, long-term (>decade) monitoring light curves by well over an order of magnitude and potentially identify sufficiently bright quasars for absorption line studies of the interstellar medium of the Clouds.2009ApJ...701..508Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/701/508CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/716/530 : Mid-IR variability from the SDWFS (Kozlowski+, 2010)J/ApJ/701/428 : The Spitzer Deep, Wide-Field Survey (SDWFS) (Ashby+, 2009)J/AJ/136/18 : LMC SAGE. New candidate YSOs (Whitney+, 2008)J/ApJ/655/212 : S3MC IRAC and MIPS photometry (Bolatto+, 2007)J/ApJ/641/140 : Optical counterparts in the NDWFS Bootes field (Brand+, 2006)J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)J/A+AS/142/41 : SMC X-ray sources ROSAT PSPC catalogue (Haberl+, 2000)J/A+AS/139/277 : LMC X-ray sources ROSAT PSPC catalogue (Haberl+, 1999)http://celestial.berkeley.edu/spitzer : S3MC (Spitzer Survey of the SMC) pagehttp://irsa.ipac.caltech.edu/data/SPITZER/SAGE/ : SAGE data accesshttp://irsa.ipac.caltech.edu/data/SPITZER/SDWFS/ : SDWFS data accesshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/701/508https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/701/508http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/701/508https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/701/508https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/701/508http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/701/508GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/701/508/agn_mc (AGN candidates behind the LMC or the SMC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/701/508/agn_mc?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/701/508/agn_mc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/701/508/agn_mc?GETtext/xml+votable180.050000true67.2983331-70.28043810.0055555555555555564/2067 2068 5/8261 8262 8263 8276 8277 8278 8280 8281 8284 6/33041 33042 33043 33071 33116 33117 33118 33128 33129 33132 33133 33140 33142 33144 33294 33295 33298 33304 33306 33316 33317 33328 33792 37514 37536 37538 37544 37546 389122.0616683193919197e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/701/508?format=asciiInfrareddefaultJ/ApJ/701/508/agn_mcAGN candidates behind the LMC or the SMCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMCSimbad column added by the CDSobs.fieldcharIDSource identification (JHHMMSS.ss+DDMMSS.s) (see Nomenclature notes)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main[3.6]? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? The 1{sigma} error in 3.6magmagstat.errorfloatnullable[4.5]? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? The 1{sigma} error in 4.5magmagstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? The 1{sigma} error in 5.8magmagstat.errorfloatnullable[8.0]? Spitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? The 1{sigma} error in 8.0magmagstat.errorfloatnullableVmag? V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? The 1{sigma} error in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableImag? I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? The 1{sigma} error in Imagmagstat.error;phot.mag;em.opt.IfloatnullableOGLEOGLE-III identification (smc/lmcFFF.F.NNNNNN; <OGLE {L/S}MCFFF.F NNNNNN> in Simbad)meta.idcharTypeSource type, from color-magnitude diagrams (1)meta.code.classcharz? Redshiftsrc.redshiftfloatnullabler_zReference of z (2)meta.ref;pos.framechar