J/MNRAS/470/1291ivo://CDS.VizieR/J/MNRAS/470/1291doi:10.26093/cds/vizier.74701291CDSSalvetti D.Chiaro G.La Mura G.Thompson D.J.2024-08-17T20:19:45Z2020-06-13T09:56:05ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomyactive-galactic-nucleibl-lacertae-objectsIn its first four years of operation, the Fermi-Large Area Telescope (LAT) detected 3033 {gamma}-ray emitting sources. In the Fermi-LAT Third Source Catalogue (3FGL) about 50 per cent of the sources have no clear association with a likely {gamma}-ray emitter. We use an artificial neural network algorithm aimed at distinguishing BL Lacs from FSRQs to investigate the source subclass of 559 3FGL unassociated sources characterized by {gamma}-ray properties very similar to those of active galactic nuclei. Based on our method, we can classify 271 objects as BL Lac candidates, 185 as FSRQ candidates, leaving only 103 without a clear classification. We suggest a new zoo for {gamma}-ray objects, where the percentage of sources of uncertain type drops from 52 per cent to less than 10 per cent. The result of this study opens up new considerations on the population of the {gamma}-ray sky, and it will facilitate the planning of significant samples for rigorous analyses and multiwavelength observational campaigns.2017MNRAS.470.1291Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/470/1291CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/820/8 : 3FGL sources statistical classificationsJ/MNRAS/462/3180 : 3FGL Blazar of Unknown Type classification (Chiaro+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/470/1291https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/470/1291http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/470/1291https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/470/1291https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/470/1291http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/470/1291GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/470/1291/table1 (*3FGL unassociated (UCS) source)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/470/1291/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/470/1291/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/470/1291/table1?GETtext/xml+votable180.050000true0.061-37.6480.0055555555555555566/50 136 187 189 270 342 428 543 661 731 897 997 1160 1250 1354 1731 1762 1965 1973 2400 2530 2539 2667 2678 2704 2722 2748 2785 2844 2917 2931 3002 3099 3130 3252 3278 3369 3419 3557 3619 3652 3726 3937 4043 4543 5000 5450 5556 5986 6036 6406 6582 6665 7080 7114 7131 7238 7249 7403 7422 7553 7587 7597 7660 7715 7767 7823 7907 7936 7947 7951 8011 8145 8474 8485 8735 8870 9032 9288 9639 9655 9683 9985 10156 10179 10194 10202 10427 10546 10971 11124 11238 11260 11351 11457 11527 11561 11689 11693 12027 12102 12153 12164 12207 12268 12313 12410 12443 12460 12476 12500 12505 12536 12544 12693 12783 12828 13032 13056 13060 13063 13136 13204 13234 13298 13324 13334 13471 13628 13638 13647 13720 13883 13889 13929 14150 14185 14274 14320 14369 14725 14730 14759 14804 14906 15137 15272 15274 15297 15323 15336 15362 15478 15488 15522 15568 15576 15589 15653 15673 15709 15733 15759 15761 15910 15994 16044 16112 16119 16269 16396 16962 17019 17095 17122 17154 17366 17734 17819 17868 17904 18110 18271 18343 18444 18499 18812 18853 19037 19236 19460 19545 19560 19671 19703 19801 19851 20026 20110 20190 20201 20283 20442 20473 20590 20611 20702 20908 21438 21449 21504 21593 21624 21710 21754 21808 21898 22186 22281 22398 22554 22621 22686 22876 23009 23158 23264 23345 23526 23728 23734 23869 23884 23995 24017 24040 24064 24134 24183 24210 24272 24482 24512 24552 24571 24641 24687 24789 24797 24836 24998 25083 25095 25106 25234 25348 25370 25403 25468 25525 25553 25781 25807 25865 26125 26150 26237 26245 26892 27061 27078 27109 27381 27413 27468 27651 27725 27772 27798 27939 28015 28037 28162 28290 28560 28615 28672 28772 28869 28922 29070 29151 29171 29210 29219 29274 29547 29772 29782 29814 29816 29844 29905 30041 30322 30327 30508 30743 30822 30984 30995 31003 31011 31026 31111 31166 31262 31500 31720 31785 32288 32535 32539 32559 32567 32609 32711 32729 33030 33047 33059 33077 33087 33096 33115-33116 33243 33296 33448 33558 34107 34115 34171 34254 34304 34375 34493 34549 34592 34623 34772 34928 34968 35030 35095 35208 35227 35354 35950 36063 36100 36133 36395 36445 36460 36673 36795 36840 36910 36951 36978 36983 37112 37119 37190 37222 37299 37312 37324 37340 37492 37746 37810 37823 37929 37940 37991 38092 38112 38127 38141 38166 38184 38191-38192 38194 38299 38331 38447 38461 38488 38494 38605 38733 38873 38877 39028-39029 39111 39120 39139 39160 39172 39190 39206 39208 39273 39489 39540 39543 39578 39717 39777 39786 39792 39805 39823 40160 40329 40337 40351 40422 40585 40636 41091 41208 41238 41298 41311 41359 41427 41451 41495 41510 41518 41568 41588 41629 41657 41694 41714 41735 41824 41841 41877 41889 42008 42122 42169 42180 42193 42204-42205 42207 42360 42432 42533 42566 42580 42584 42630 42679 42803 42860 42920 42946 43006 43021 43077 43082 43155 43197 43227 43255 43280 43294 43319 43339 43354 43434-43435 43467 43634 43660 43710 43746 43784 43845 43891 43899 43914 44049 44123 44322 44389 44654 44735 44913 45022 45077 45101 45105 45119 45136 45189 45197 45199 45226 45242 45307 45316 45397 45446 45457 45581 45597 45640 45707 45736 45847 45902 45904 45977 46052 46150 46208 46361 46444 46534 46568-46569 46621 46626 46744 47253 47442 47447 47461 47487 48019 48274 48300 48446 48528 48580 48670 48854 48858 48962https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/470/1291?format=asciiGamma-raydefaultJ/MNRAS/470/1291/table1*3FGL unassociated (UCS) sourcerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName3FGL Name (JHHMM.m+DDMMa)meta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonGLATGalactic longitudedegpos.galactic.latfloatLBLL[0/1] ANN likelihood to be classified as BL Lacstat.likelihooddoubleLFRRQ[0/1] ANN likelihood to be classified as FSRQacstat.likelihooddoubleClassPredicted classification (1)src.classcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main