J/A+A/602/A86ivo://CDS.VizieR/J/A+A/602/A86doi:10.26093/cds/vizier.36020086CDSLefaucheur J.Pita S.2018-11-26T11:57:44Z2017-06-20T09:22:37ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleibl-lacertae-objectsgamma-ray-astronomyWe present a study to search for, and characterise blazar candidates among the Fermi/LAT 3FGL catalogue using machine-learning classification methods. Classifiers are based on the exploitation of statistical differences imprinted in the 3FGL Fermi/LAT catalogue, such as variability and spectral shape, between different populations of sources.2017A&A...602A..86Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/602/A86CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/753/83 : Associations to 1FGL sources (Ackermann+, 2012)J/MNRAS/424/L64 : AGN/pulsar distinction for 2FGL sources (Mirabal+, 2012)J/ApJS/206/13 : Blazars with {gamma}-ray counterparts. II. (Massaro+, 2013)J/ApJS/207/4 : Unidentified {gamma}-ray sources. III. Radio (Massaro+, 2013)J/ApJ/782/41 : 231 AGN candidates from the 2FGL catalog (Doert+, 2014)J/ApJ/820/8 : 3FGL sources statistical classificationshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/602/A86https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/602/A86http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/602/A86https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/602/A86https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/602/A86http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/602/A86GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/602/A86/table5 (blazar candidates from unassociated 3FGL sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/602/A86/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/602/A86/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/602/A86/table5?GETtext/xml+votable180.050000true0.06142-37.648290.005555555555555556Cone search capability for table J/A+A/602/A86/table7 (Type assignation of blazar candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/602/A86/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/602/A86/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/602/A86/table7?GETtext/xml+votable180.050000true0.06142-37.648290.0055555555555555566/14 39 50 136 187 189 270 289 342 428 440 465 543 556 661 720 730-731 739 897-898 961 968 997 1087 1094 1160 1222 1233 1250 1342 1354 1390 1462 1584 1680 1731 1959 1976 2008 2042 2100 2331 2400 2434 2439 2478 2530 2539 2667 2678 2704 2708 2722 2748 2754 2788 2844 2896 2912 2917 2929 2931 2966 2994 3052 3130 3252 3272 3278 3338 3369 3382 3401 3419 3465 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49142https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/602/A86?format=asciiGamma-raydefaultJ/A+A/602/A86/table5blazar candidates from unassociated 3FGL sourcesFlagsFlags (1)meta.code.errorintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint3FGL3FGL source name, JHHMM.m+DDMM (Source_Name)meta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latlogsigmacDiscriminant parameter normalised curvature (NormalizedCurvature) (2)stat.fit.goodnessfloatlogTSDiscriminant parameter normalised variability (NormalizedVariability) (G2)src.var.indexfloatHR23Discriminant parameter HR23 hardness ratio (G3)phot.flux;arith.ratiofloatHR34Discriminant parameter HR34 hardness ratio (G3)phot.flux;arith.ratiofloatHR23-HR34Discriminant parameter curvature, HR23-HR34 (Curvature)phot.flux;arith.ratiofloatlambdaDiscriminant parameter lambda (Lambda) (3)stat.paramfloatzetaBDTOutput parameter zeta from BDT decision (zeta_BDT) (G5)stat.fit.paramfloatzetaMLPOutput parameter zeta from MLP decision (zeta_MLP) (G5)stat.fit.paramfloatTypeBlazar type (BlazarType) (G6)src.classcharSP16[yes/no ] In Saz Parkinson et al. (2016, Cat. J/ApJ/820/8) (Saz_Parkinson_2016)meta.codecharMi12[yes/no ] In Mirabal et al. (2012, Cat. J/MNRAS/424/L64) (Mirabal_2012)meta.codecharA12[yes/no ] In Ackermann et al. (2012, Cat. J/ApJ/753/83) (Ackermann_2012)meta.codecharMa13[yes/no ] In Massaro et al. (2013, Cat. J/ApJS/207/4 and J/ApJS/206/13) (Massaro_2013)meta.codecharD14[yes/no ] In Doert & Errando (2014, Cat. J/ApJ/782/41) (Doert_2014)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/A+A/602/A86/table7Type assignation of blazar candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint3FGL3FGL source name, JHHMM.m+DDMM (Source_Name)meta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latClass[BCU UnId] Classification (CLASS) (1)meta.codechargammaSpectral index of the power law hypothesis (PowerLaw_Index)spect.indexfloatlogEpDiscriminant parameter pivot energy (which is somewhat correlated to the position of the high energy peak) (Pivot_Energy)em.energyfloatlogTSDiscriminant parameter normalised variability (NormalizedVariability) (G2)src.var.indexfloatHR23Discriminant parameter HR23 hardness ratio (G3)phot.flux;arith.ratiofloatHR34Discriminant parameter HR34 hardness ratio (G3)phot.flux;arith.ratiofloatzetaBDTOutput parameter zeta from BDT decision (zeta_BDT) (G5)stat.fit.paramfloatzetaMLPOutput parameter zeta from MLP decision (zeta_MLP) (G5)stat.fit.paramfloatTypeBlazar type (BlazarType) (G6)src.classcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed