J/ApJ/867/131ivo://CDS.VizieR/J/ApJ/867/131doi:10.26093/cds/vizier.18670131CDSZywucka N.Goyal A.Jamrozy M.Stawarz L.Ostrowski M.Kozlowski S.,Udalski A.2021-02-23T11:07:06Z2019-10-23T14:40:07ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsactive-galactic-nucleiquasarsmagellanic-cloudsinfrared-photometryvisible-astronomyphotometryradio-astronomyredshiftedsurveysWe report the identification of blazar candidates behind the Magellanic Clouds. The objects were selected from the Magellanic Quasars Survey (MQS), which targeted the entire Large Magellanic Cloud (LMC) and 70% of the Small Magellanic Cloud (SMC). Among the 758 MQS quasars and 898 of the unidentified (featureless spectra) objects, we identified a sample of 44 blazar candidates, including 27 flat-spectrum radio quasars and 17 BL Lacertae objects, respectively. All the blazar candidates from our sample were identified with respect to their radio, optical, and midinfrared properties. The newly selected blazar candidates possess the long-term, multicolor photometric data from the Optical Gravitational Lensing Experiment, multicolor midinfrared observations, and archival radio data for one frequency at least. In addition, for nine of them, the radio polarization data are available. With such data, these objects can be used to study the physics behind the blazar variability detected in the optical and midinfrared bands, as a tool to investigate magnetic field geometry of the LMC and SMC, and as an exemplary sample of point-like sources most likely detectable in the {gamma}-ray range with the newly emerging Cherenkov Telescope Array.2018ApJ...867..131Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/867/131CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/38 : The Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Griffith+ 1993-1996)IX/10 : ROSAT All-Sky Bright Source Catalogue (Voges+ 1999)VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1) (Mauch+ 2008)VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)J/AJ/115/1253 : Deep X-Ray Radio Blazar Survey (DXRBS). I. (Perlman+ 1998)J/A+AS/139/277 : LMC X-ray sources ROSAT PSPC catalogue (Haberl+, 1999)J/A+AS/142/41 : SMC X-ray sources ROSAT PSPC catalogue (Haberl+, 2000)J/MNRAS/323/757 : Deep X-Ray Radio Blazar Survey (DXRBS). II. (Landt+, 2001)J/MNRAS/329/877 : The CLASS blazar survey. II. (Caccianiga+, 2002)J/MNRAS/335/1085 : ATCA SMC Radio Continuum Source. I. (Filipovic+, 2002)J/AJ/123/855 : Magellanic Clouds Photometric Survey: SMC (Zaritsky+, 2002)J/AJ/128/1606 : Magellanic Clouds Photometric Survey: LMC (Zaritsky+, 2004)J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)J/ApJ/655/212 : S3MC IRAC and MIPS photometry (Bolatto+, 2007)J/AJ/134/799 : Multiwaveband polarimetry of 15 AGN (Jorstad+, 2007)J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009)J/ApJ/701/508 : 5000 AGNs behind the Magellanic clouds (Kozlowski+, 2009)J/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010)J/ApJ/718/587 : The Fermi-AT20G catalog (Mahony+, 2010)J/MNRAS/402/2403 : Australia Telescope 20GHz Survey Catalog, (Murphy+, 2010)J/AJ/139/390 : Opt selected BL Lac objects from SDSS-DR7 (Plotkin+, 2010)J/ApJS/194/22 : Magellanic QSOs Survey: QSOs behind SMC (Kozlowski+, 2011)J/ApJ/748/68 : WISE IR colors of gamma-ray blazars (D'Abrusco+, 2012)J/ApJ/746/27 : Magellanic QSOs Survey.II.AGNs behind LMC (Kozlowski+, 2012)J/ApJ/759/25 : Rotation measures at 1.4GHz toward the LMC (Mao+, 2012)J/MNRAS/422/1527 : Australia Telescope PMN follow-up survey (McConnell+, 2012)J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)J/ApJ/775/92 : MQS III: AGNs behind LMC and SMC (Kozlowski+, 2013)J/ApJ/767/14 : MASIV survey III. Optical identifications (Pursimo+, 2013)J/A+A/549/A29 : Quasars behind the Magellanic system (Cioni+, 2013)J/ApJS/215/14 : WISE candidate {gamma}-ray blazar radio (D'Abrusco+, 2014)J/other/Nat/515.376 : Relativistic jet powers in blazars (Ghisellini+, 2014)J/other/AstBu/69.266 : RATAN-600 flux densities 37 blazars (Mufakharov+,2014)J/MNRAS/450/2658 : RATAN-600 flux densities of 123 blazars (Mufakharov+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/867/131https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/867/131http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/867/131https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/867/131https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/867/131http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/867/131GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/867/131/table3 (Newly identified FSRQ and BL Lac type blazar candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/867/131/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/867/131/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/867/131/table3?GETtext/xml+votable180.050000true13.68625-72.80380.0055555555555555566/33045 33046 33052 33054 33055 33076 33077 33078 33081 33084 33085 33090 33093 33095 33096 33097 33100 33102 33104 33106 33122 33124 33126 33128 33294 33295 33299 33304 33305 33307 375385.585776613014535e-25 2.6706780932288093e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/867/131?format=asciiOpticalInfraredRadiodefaultJ/ApJ/867/131/table3Newly identified FSRQ and BL Lac type blazar candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSet[1/2] Subset (G1)meta.idintNameShortened object name (JHHMM+DDMM) (G2)meta.id;meta.maincharprimaryf_Name[a] Flag on name, a=Dubious Sourcemeta.codecharRAJ2000[0/6] Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000[66/73] Degree of declination (J2000) (1)pos.eq.dec;meta.mainR[12/7020]? Radio-loudness R parameter (2)phot.flux;arith.ratiointnullablez[0.2/3.4]? Redshift (1)src.redshiftfloatnullablear[-0.6/1.4]? Radio spectral index {alpha}_r_spect.indexfloatnullablee_ar[0/0.4]? Uncertainty in arstat.errorfloatnullableaIR[-0.5/3.1]? Mid-IR spectral index {alpha}_IR_spect.indexfloatnullablee_aIR[0/0.5]? Uncertainty in aIRstat.errorfloatnullableImag[16.5/21.3] I band magnitude (1)magphot.mag;em.opt.IfloatK09Display data from Kozlowski+, 2009, J/ApJ/701/508meta.ref.urlintnullableK13Display data from the MQS III (Kozlowski+, 2013, J/ApJ/775/92)meta.ref.urlcharJ/ApJ/867/131/table2The radio fluxes of flat-spectrum radio quasar (FSRQ) type blazar candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSet[1/2] Subset (G1)meta.idintNameShortened object name (JHHMM+DDMM) as in Table 3 (G2)meta.id;meta.maincharprimaryf_Name[a] Flag on Name: a=Dubious Sourcemeta.codecharF0.84[6/177]? SUMSS/MOST 0.843GHz flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_F0.84[0.8/8]? Uncertainty in F0.84mJystat.errorfloatnullableF1.42[45/112]? ATCA/Parkes SMC 1.42GHz flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_F1.42[2/6]? Uncertainty in F1.42mJystat.errorfloatnullableF2.37[4/77.4]? ATCA/Parkes SMC 2.37GHz flux densitymJyphot.flux.density;em.radio.1500-3000MHzfloatnullablee_F2.37[0.2/4]? Uncertainty in F2.37mJystat.errorfloatnullableF4.8[2.8/288]? ATCA/Parkes 4.8GHz flux densitymJyphot.flux.density;em.radio.3-6GHzfloatnullablee_F4.8[0.7/15]? Uncertainty in F4.8mJystat.errorfloatnullablef_F4.8[e] Flag on F4.8 (1)meta.codecharF4.85[26/95]? PMN Parkes 64m 4.85GHz flux densitymJyphot.flux.density;em.radio.3-6GHzfloatnullablee_F4.85[6/8]? Uncertainty in F4.85mJystat.errorfloatnullableF5.0[17/72]? AT20G/ATCA 5.0GHz flux densitymJyphot.flux.density;em.radio.3-6GHzfloatnullablee_F5.0[2/7]? Uncertainty in F5.0mJystat.errorfloatnullableF8.0[56/72]? AT20G/ATCA 8.0GHz flux densitymJyphot.flux.density;em.IR.8-15umfloatnullablee_F8.0[3/4]? Uncertainty in F8.0mJystat.errorfloatnullableF8.6[6/61]? ATCA/Parkes 8.6GHz flux densitymJyphot.flux.density;em.radio.6-12GHzfloatnullablee_F8.6[1/10]? Uncertainty in F8.6mJystat.errorfloatnullablef_F8.6[e] Flag on F8.6 (1)meta.codecharF20.0[46/74]? AT20G/ATCA 20.0GHz flux densitymJyphot.flux.density;em.radio.12-30GHzfloatnullablee_F20.0[3/4]? Uncertainty in F20.0mJystat.errorfloatnullable