J/ApJS/206/12ivo://CDS.VizieR/J/ApJS/206/12doi:10.26093/cds/vizier.22060012CDSD'Abrusco R.Massaro F.Paggi A.Masetti N.Tosti G.Giroletti M.,Smith H.A.2017-12-05T05:09:45Z2013-08-06T09:12:49ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsinfrared-photometryredshiftedquasarsgamma-ray-astronomyastronomical-object-identificationWe present a new method for identifying blazar candidates by examining the locus, i.e., the region occupied by the Fermi {gamma}-ray blazars in the three-dimensional color space defined by the WISE infrared colors. This method is a refinement of our previous approach that made use of the two-dimensional projection of the distribution of WISE {gamma}-ray-emitting blazars (the Strip) in the three WISE color-color planes. In this paper, we define the three-dimensional locus by means of a principal component analysis of the color distribution of a large sample of blazars composed of all the ROMA-BZCAT sources with counterparts in the WISE All-Sky Catalog associated with {gamma}-ray sources in the second Fermi-LAT catalog (2FGL; the WISE Fermi blazars sample, WFB). Our new procedure yields a total completeness of c_tot_~81% and a total efficiency of e_tot_~97%. We also obtain local estimates of the efficiency and completeness as functions of the WISE colors and galactic coordinates of the candidate blazars. The catalog of all WISE candidate blazars associated with the WFB sample is also presented, complemented by archival multi-frequency information for the alternative associations. Finally, we apply the new association procedure to all {gamma}-ray blazars in the 2FGL and provide a catalog containing all the {gamma}-ray candidate blazars selected according to our procedure.2013ApJS..206...12Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/206/12CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/311 : WISE All-Sky Data Release (Cutri+ 2012)J/A+A/495/691 : Multifrequency catalog of blazars Roma-BZCAT (Massaro+, 2009)J/ApJS/206/17 : New gamma-ray blazar candidates in the 3PBC (Maselli+, 2013)J/ApJS/206/13 : Unidentified gamma-ray sources. II. (Massaro+, 2013)J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)J/A+A/541/A160 : X+gamma-ray observations of selected blazars (Giommi+, 2012)J/A+A/538/A26 : BL Lac objects beyond z=1.3 (Rau+, 2012)J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)J/ApJ/732/116 : IR spectra of {gamma}-ray bright blazars (Malmrose+, 2011)J/ApJ/722/520 : Gamma-ray light curves of Fermi blazars (Abdo+, 2010)J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)J/ApJ/709/1407 : SED of the Fermi blazars (Li+, 2010)J/ApJ/700/597 : FERMI LAT detected blazars (Abdo+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/206/12https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/206/12http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/206/12https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/206/12https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/206/12http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/206/12GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/206/12/table8 (WISE Fermi blazar sample (WFB))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/206/12/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/206/12/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/206/12/table8?GETtext/xml+votable180.050000true0.3250417-7.77408330.005555555555555556Cone search capability for table J/ApJS/206/12/table9 (Fermi 2FGL blazar sample (2FB))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/206/12/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/206/12/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/206/12/table9?GETtext/xml+votable180.050000true45.896791747.27119440.0055555555555555566/60 100 110 250 438 447 514 579 716 808 911 991 1120 1509 1593 1622 2094 2122 2143 2228 2234 2295 2331 2404 2414 2484 2574 2636 2661 2741 2792 2836 2867 3017 3023 3024 3096 3366 3431 3712 3876 3882 3951 4134 4255 4312 4352 4572 4695 4770 4801 4820 4855 4865 4866 4882 4940 4960 4964 5072 5098 5139 5154 5162 5201 5284 5353 5361 5371 5390 5404 5423 5458 5462 5483 5546 5597 5693 5771 5775 5776 5795 5817 5836 5848 5870 5918 6015 6018 6067 6088 6096 6101 6110 6167 6348 6368 6406 6496 6501 6515 6559 6582 6636 6647 6723 6777 6815 6822 6888 6948 6963 6984 6996 7038 7045 7091 7181 7212 7235 7285 7315 7346 7354 7389 7426 7448 7475 7518 7548 7553 7570 7623 7640 7653 7655 7709 7758 7764 7896 7969 8057 8071 8290 8299 8321 8374 8466 8487 8515 8615 8699 8746 8818 8830 8915 8945 8955 8972 9003 9013 9075 9196 9204 9442 9460 9501 9545 9566 9570 9612 9629 9632 9676 9688 9711 9714 9723 9773 9906 9914 9998 10006 10046 10071 10119 10183 10198 10249 10250 10280 10294 10352 10426 10466 10474 10512 10524 10548 10561 10572 10597 10605 10612 10625 10669 10681 10780 10800 10843 10910 10921 10971 10994 11027 11045 11153 11177 11209 11212 11242 11321 11374 11385 11396 11430 11522 11523 11631 11639 11640 11649 11682 11777 11912 11965 11975 12173 12199 12218 12231 12323 12466 12475 12599 12604 12619 12625 12687 12842 13156 13179 13352 13353 13406 13410 13485 13572 13582 13586 13613 13664 13673 13705 13711 13729 13867 13927 14751 14797 14854 14857 15023 15059 15147 15211 15269 15286 15490 15917 15955 15969 15998 16027 16057 16059 16170 16223 16272 16281 16298 16447 16510 16532 16661 16676 16720 16796 16971 17019 17048 17184 17186 17347 17364 17414 17516 17541 17579 17611 17665 17843 17857 17917 17927 17944 18035 18070 18084 18109 18119 18210 18253 18270 18402 18457 18624 18661 18718 18755 18853 18889 19023 19088 19143 19190 19370 19373 19398 19523 19593 19622 19723 19756 19789 19831 19878 19907 19910 19989 20006 20049 20083 20099 20141 20202 20213 20468 20611 20657 20777 20888 20908 20920 20929 21121 21131 21160 21179 21266 21358 21564 21574 21764 21768 21793 21873 21935 21960 21968 21972 22047 22271 22363 22396 22501 22558 22621 22658 22730 22894 22917 22950 23014 23015 23022 23099 23121 23127 23134 23215 23222 23383 23416 23436 23691 23897 24027 24084 24112 24123 24260 24608 24775 24828 24845 24902 24906 24941 25061 25132 25196 25302 25409 25501 25503 25519 25542 25630 25649 25677 25818 25835 25864 25910 26032 26036 26131 26203 26242 26254 26256 26292 26297 26303 26340 26442 26483 26539 26550 26565 26626 26695 26798 26964 26983 27056 27060 27082 27206 27217 27310 27423 27433 27472 27523 27524 27857 28042 28066 28083 28101 28117 28138 28139 28342 28352 28370 28454 28479 28492 28498 28517 28546 28673 29017 29570 29620 29729 29772 29952 30012 30036 30446 30928 31079 31190 31362 31407 31430 31451 31485 31566 31656 31663 31664 31763 31773 31844 31894 31915 31930 31967 32247 32261 32311 32345 32605 32611 32621 32712 32808 32831 32832 33040 33370 33412 33549 33560 33570 33744 33774 33825 33827 33880 33881 33964 34086 34095 34123 34209 34317 34428 34461 34517 34528 34572 34637 34675 34747 34767 34870 35076 35119 35252 35281 35370 35475 35501 35624 35700 35706 35722 35786 35801 35963 35981 36058 36090 36100 36151 36155 36188 36278 36548 36551 36554 36602 36665 36882 36941 37045 37385 37512 37529 38189 38277 38355 38481 38715 38766 38797 38802 38953 39131 39489 39505 40265 40344 40353 40412 40479 40689 40703 40762 40766 40874 40885 40949 41072 41335 41363 42658 42901 42914 43122 43246 43366 43380 43399 43447 43451 43822 44059 44069 44147 44170 44247 44340 44705 44730 44813 44908 45011 45081 45178 45713 46055 46204 46251 46258 46310 46369 46374 46444 46448 46545 46740 46787 46798 46835 46852 46887 46964 47014 47016 47057 47080 47248 47319 47375 47413 47512 47534 47540 47708 47714 47969 48023 48123 48589 48595 48629 48798 48885 48985 49037 49071 49083https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/206/12?format=asciiGamma-rayOpticalInfrareddefaultJ/ApJS/206/12/table8WISE Fermi blazar sample (WFB)e_[3.4/4.6]3.4-3.6 color index uncertaintymagstat.errorfloate_[12/22]12-22 color index uncertaintymagstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2FGL2FGL name of the {gamma}-ray source associated (JHHMM.m+DDMM)meta.id;meta.maincharWISEWISE name of the candidate blazar (JHHMMSS.ss+DDMMSS.s)meta.id.assoccharONameAlternative name in the litterature (ROMA-BZCAT name for table 8)meta.idchar[3.4/4.6]WISE 3.4-3.6 um color index (c_1_)magphot.color;em.IR;em.IRfloat[4.6/12]WISE 4.6-12 um color index (c_2_)magphot.color;em.IR;em.IRfloate_[4.6/12]4.6-12 color index uncertaintymagstat.errorfloat[12/22]WISE 12-22 um color index (c_3_)magphot.color;em.IR;em.IRfloatTypeClassification of the candidate blazar according to our method (BZB=BL Lac object, BZQ=Flat Spectrum Radio Quasar)src.classcharClass[ABC] Class of the candidate blazar according to our method (1)meta.code.classcharNotesNotes about available associations (2)meta.notecharz[0.02/3.11]? Redshift of the sourcesrc.redshiftfloatnullableNbr? Number of WISE sources in the background region (3)meta.numberintnullableSimbadSimbad column added by the CDSmeta.refchar_RAPositions from WISE names (right ascension part)degpos.eq.ra;meta.main_DEPositions from WISE names (declination part)degpos.eq.dec;meta.mainJ/ApJS/206/12/table9Fermi 2FGL blazar sample (2FB)Nbr? Number of WISE sources in the background region (3)meta.numberintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2FGL2FGL name of the {gamma}-ray source associated (JHHMM.m+DDMM)meta.id;meta.maincharWISEWISE name of the candidate blazar (JHHMMSS.ss+DDMMSS.s)meta.id.assoccharONameAlternative name in the litterature (ROMA-BZCAT name for table 8)meta.idchar[3.4/4.6]WISE 3.4-3.6 um color index (c_1_)magphot.color;em.IR;em.IRfloate_[3.4/4.6]3.4-3.6 color index uncertaintymagstat.errorfloat[4.6/12]WISE 4.6-12 um color index (c_2_)magphot.color;em.IR;em.IRfloate_[4.6/12]4.6-12 color index uncertaintymagstat.errorfloat[12/22]WISE 12-22 um color index (c_3_)magphot.color;em.IR;em.IRfloate_[12/22]12-22 color index uncertaintymagstat.errorfloatTypeClassification of the candidate blazar according to our method (BZB=BL Lac object, BZQ=Flat Spectrum Radio Quasar)src.classcharClass[ABC] Class of the candidate blazar according to our method (1)meta.code.classcharNotesNotes about available associations (2)meta.notecharz[0.02/3.11]? Redshift of the sourcesrc.redshiftfloatnullableu_z[?] Uncertainty flag on redshiftmeta.code.error;src.redshiftcharFlagReassociation flag (4)meta.code.errorcharSimbadNameSimbad column added by the CDSmeta.idcharNEDSimbad column added by the CDSmeta.refchar_RAPositions from WISE names (right ascension part)degpos.eq.ra;meta.main_DEPositions from WISE names (declination part)degpos.eq.dec;meta.main