J/ApJ/892/105ivo://CDS.VizieR/J/ApJ/892/105doi:10.26093/cds/vizier.18920105CDSAjello M.Angioni R.Axelsson M.Ballet J.Barbiellini G.Bastieri D.,Becerra Gonzalez J.Bellazzini R.Bissaldi E.Bloom E.D.Bonino R.,Bottacini E.Bruel P.Buson S.Cafardo F.Cameron R.A.Cavazzuti E.,Chen S.Cheung C.C.Ciprini S.Costantin D.Cutini S.D'Ammando F.,de la Torre Luque P.de Menezes R.de Palma F.Desai A.Di Lalla N.,Di Venere L.Dominguez A.Dirirsa F.F.Ferrara E.C.Finke J.,Franckowiak A.Fukazawa Y.Funk S.Fusco P.Gargano F.Garrappa S.,Gasparrini D.Giglietto N.Giordano F.Giroletti M.Green D.,Grenier I.A.Guiriec S.Harita S.Hays E.Horan D.Itoh R.,Johannesson G.Kovac'evic' M.Krauss F.Kreter M.Kuss M.Larsson S.,Leto C.Li J.Liodakis I.Longo F.Loparco F.Lott B.Lovellette M.N.,Lubrano P.Madejski G.M.Maldera S.Manfreda A.Marti-Devesa G.,Massaro F.Mazziotta M.N.Mereu I.Meyer M.Migliori G.Mirabal N.,Mizuno T.Monzani M.E.Morselli A.Moskalenko I.V.Negro M.Nemmen R.,Nuss E.Ojha L.S.Ojha R.Omodei N.Orienti M.Orlando E.Ormes J.F.,Paliya V.S.Pei Z.Pena-Herazo H.Persic M.Pesce-Rollins M.Petrov L.,Piron F.Poon H.Principe G.Raino S.Rando R.Rani B.Razzano M.,Razzaque S.Reimer A.Reimer O.Schinzel F.K.Serini D.Sgro C.,Siskind E.J.Spandre G.Spinelli P.Suson D.J.Tachibana Y.,Thompson D.J.Torres D.F.Torresi E.Troja E.Valverde J.van Zyl P.,Yassine M.2022-01-17T12:31:09Z2021-09-01T11:55:01ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleigamma-ray-astronomyredshiftedradio-sourcesx-ray-sourcesbl-lacertae-objectsquasarsastronomical-object-identificationThe fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) between 2008 August 4 and 2016 August 2 contains 2863 objects located at high Galactic latitudes (|b|>10{deg}). It includes 85% more sources than the previous 3LAC catalog based on 4yr of data. AGNs represent at least 79% of the high-latitude sources in the fourth Fermi-Large Area Telescope Source Catalog (4FGL), which covers the energy range from 50MeV to 1TeV. In addition, 344 gamma-ray AGNs are found at low Galactic latitudes. Most of the 4LAC AGNs are blazars (98%), while the remainder are other types of AGNs. The blazar population consists of 24% Flat Spectrum Radio Quasars (FSRQs), 38% BL Lac-type objects, and 38% blazar candidates of unknown types (BCUs). On average, FSRQs display softer spectra and stronger variability in the gamma-ray band than BL Lacs do, confirming previous findings. All AGNs detected by ground-based atmospheric Cerenkov telescopes are also found in the 4LAC.2020ApJ...892..105Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/892/105CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1) (Mauch+ 2008)VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/PASP/113/10 : Sub-mJy radio sources complete sample (Masci+, 2001)J/MNRAS/329/877 : The CLASS blazar survey. II. (Caccianiga+, 2002)J/ApJS/171/61 : All-Sky Survey of Flat-Spectrum Radio Sources (Healey+, 2007)J/ApJS/175/97 : CGRaBS: survey of {gamma}-ray blazar cand. (Healey+, 2008)J/AJ/138/1032 : Filling in the gaps in the 4.85GHz sky (Healey+, 2009)J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)J/MNRAS/402/2403 : Australia Telescope 20GHz Survey Cat., AT20G (Murphy+, 2010)J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)J/ApJ/742/27 : 15GHz and jet properties of MOJAVE blazars (Lister+, 2011)J/MNRAS/432/1294 : Fermi unassociated sources ATCA observations (Petrov+, 2013)J/ApJ/764/135 : Spectroscopic redshifts of BL Lac objects (Shaw+, 2013)J/ApJS/215/14 : WISE cand. {gamma}-ray blazar radio sources (D'Abrusco+, 2014)J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)J/ApJ/810/14 : Third catalog of LAT-detected AGNs (3LAC) (Ackermann+, 2015)J/A+A/576/A126 : The 2009 multiwavelength campaign on Mrk421 (Aleksic+, 2015)J/ApJS/217/2 : Refined associations of Fermi/LAT sources (Massaro+, 2015)J/ApJS/217/4 : 2FGL sources observed between 5-9GHz (Schinzel+, 2015)J/A+A/588/A103 : 2nd ROSAT all-sky survey (2RXS) source catalog (Boller+, 2016)J/MNRAS/462/3180 : 3FGL Blazar of Unknown Type classification (Chiaro+, 2016)J/A+A/596/A45 : Radio light curves of 8 AGN (Fuhrmann+, 2016)J/ApJ/833/77 : gamma-ray bright blazars optical polarization (Itoh+, 2016)J/ApJ/846/34 : Flaring gamma-ray sources; LAT 7.4yr (2FAV) (Abdollahi+, 2017)J/A+A/598/A134 : {gamma}-ray signature in WHSP blazars (1BIGB) (Arsioli+, 2017)J/A+A/598/A49 : FRICAT. FIRST catalog of FR I radio galaxies (Capetti+, 2017)J/A+A/601/A81 : FIRST catalog of FR II radio galaxies (Capetti+, 2017)J/A+A/598/A17 : The 2WHSP catalog (Chang+, 2017)J/ApJ/851/33 : Multi-wavelength analysis of CGRaBS blazars (Paliya+, 2017)J/ApJS/229/39 : Narrow line Seyfert 1 galaxies from SDSS-DR12 (Rakshit+, 2017)J/ApJ/838/139 : Radio follow-up on 3FGL unassociated sources (Schinzel+, 2017)J/ApJS/238/9 : Catalog of giant radio sources known to date (Kuzmicz+, 2018)J/ApJ/861/130 : BL Lac objects GTC low res. spectroscopy (Landoni+, 2018)J/ApJ/874/43 : MOJAVE. XVII. Jet kinematics of AGNs (Lister+, 2019)J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/892/105https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/892/105http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/892/105https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/892/105https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/892/105http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/892/105GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/892/105/4lac (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/892/105/4lac?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/892/105/4lac?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/892/105/4lac?GETtext/xml+votable180.050000true0.312647.68590.005555555555555556Cone search capability for table J/ApJ/892/105/table5 (3LAC sources not present in 4LAC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/892/105/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/892/105/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/892/105/table5?GETtext/xml+votable180.050000true21.979166725.8550.0055555555555555565/425 6/14 18 29 39 49 60 90 100 110 137 143 166 180 189 226 250 267 342 376 398 438 441 447 465 514 530 532 543 556 576 579 583 597 611 615 624 700 714 716-717 720 730-731 739 743 770 800 809 817 851 893 897-898 911 961 968 974 988 991 1018 1029 1032 1085 1087 1094 1116 1120 1125 1154 1163 1203 1222 1233 1250 1263 1312 1315 1342 1390 1462 1469 1483 1509 1539 1546 1551 1584 1593 1611 1617 1622 1626 1632 1680 1740-1741 1767-1768 1782 1853 1888 1915 1973 1984-1985 1988 2028 2031 2037 2042 2066 2078 2094 2098 2100 2122 2140 2143 2220 2228 2234 2249 2255 2273 2295 2310 2331 2340 2357 2376 2400 2404 2414 2434 2439 2460 2484 2492 2505 2531 2549 2568 2574 2603 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33865 33870 33880-33881 33898 33929 33962 33964 33968 33997 34003 34012-34013 34038 34046 34072 34085-34086 34095 34099 34104 34123 34128 34163 34168 34171 34187 34209-34210 34214 34245 34250 34264 34285 34304 34312 34317 34334 34375 34428 34437 34443 34461 34464 34478 34489 34493 34517 34520 34528 34534 34547 34569 34572 34590 34592 34617 34623 34637 34647 34656 34675 34680 34699 34721 34747 34759 34767 34771-34772 34779 34832 34870-34871 34874 34900 34911 34918 34922 34931 34946 34956 34966-34968 35033 35039 35046 35063 35074 35076 35078 35093 35116 35119 35146 35187 35199 35208 35216 35227 35252 35263 35274 35276 35281 35294 35301 35311 35330 35333 35342 35370 35376 35384 35401-35402 35433-35434 35441 35475 35484 35489 35498 35501-35502 35535 35542 35590 35594 35603 35624 35630 35664 35681 35701 35706 35722 35731 35742 35765 35773 35786 35790 35801 35817 35821 35833 35836 35868 35886 35901 35905 35925 35927 35936 35950 35960 35963 35969 35981 36001 36003 36005 36033 36038 36058 36063 36090 36100 36111 36113 36117 36120 36133-36134 36137-36138 36144 36151 36155 36188 36196 36204 36217 36222 36237 36251 36273 36278 36295-36296 36316 36333 36342 36346 36361 36366 36370 36391 36460 36471 36548 36551 36554 36580 36602 36607 36611 36614-36615 36665 36673 36688 36707-36708 36719 36731 36736 36747 36770 36777 36779 36793 36798 36813 36825 36840 36842 36877 36882 36892 36910 36941 36951 36973 36997 37022 37040 37045 37068 37138 37190-37191 37202 37215 37229 37246 37261 37278 37299 37311 37385 37418 37425 37438 37472 37480 37487 37492 37494 37512 37519 37523 37529 37534 37564 37568 37587 37600 37667 37686 37688 37745 37761 37777 37779 37826 37829 37832 37850 37940 37950 37991 37994 38035 38046 38112 38166 38177 38186 38189 38192 38236 38246 38277 38316 38331-38332 38352 38355 38369 38389 38409 38418 38470 38481 38486 38495 38516 38579 38635 38663 38715 38734 38740 38759 38762-38763 38766 38772 38787 38797 38802 38832 38837 38861 38868 38871 38873 38903 38911 38916 38918 38937 38942 38953-38954 38992 39002 39006-39007 39012 39028 39037 39062 39065 39077 39081 39085 39092 39131-39132 39138 39142 39146 39160 39190 39208 39210 39298 39341 39351 39353-39354 39376 39395 39464 39466-39467 39489 39505 39517 39520 39529 39542 39544 39570 39599-39600 39619 39654 39658 39671 39677 39717 39724 39742 39752 39781 39786 39866 39963 39969 39974 39978 40024 40036 40047 40092 40096 40174 40194 40205 40211 40214 40235 40254 40265 40323 40331 40337 40344 40351 40353 40392 40412 40422 40434 40452 40455 40470 40474 40479 40493-40494 40506 40515 40527 40533 40598 40635-40636 40689 40692 40698 40703 40708 40755 40762 40766 40786 40811 40831 40842 40874 40879 40885 40890 40905 40919 40931 40949 40988 40997 41009 41030 41047 41058 41067 41072-41073 41088 41105 41110 41114 41130 41137 41155 41179 41222 41241 41310 41325 41335 41345 41363 41374 41396 41426 41460 41464 41495 41507 41510-41511 41524 41543 41574 41578 41586 41607 41619 41653 41701 41725 41729 41757 41782 41824 41903 41938 41942 41966 41970 41982 41988 42008 42012 42020 42024 42046 42054 42067 42071 42081 42102 42105 42107 42118 42161 42188 42202 42228 42256 42261 42360 42411 42432 42440 42481 42493 42515 42540 42571 42580 42584 42601 42609 42658 42675 42779 42803 42809 42816 42822 42834 42901 42904 42914 42920 42978-42980 42989 43038 43066 43085 43105 43112 43116 43122 43186 43198 43225 43246 43262 43283 43294 43354 43366 43377 43380 43382 43399 43412 43421-43422 43441 43443 43447 43451 43483 43490 43503 43556 43572 43578 43595-43597 43603 43630 43643 43649 43651 43662 43696 43707 43710 43746 43788 43793 43802 43805 43822 43877 43883 43888 43891 43914 43978 43986 43996 44011 44043 44046 44049-44050 44052 44059 44069 44106 44113 44121 44123 44137 44140 44147 44153 44170 44173 44179 44192-44193 44213 44223 44247 44255 44290-44291 44308 44313 44336 44340 44365 44379 44389 44420 44449 44477 44484 44493 44508 44519 44526 44533 44539-44540 44543 44582 44592 44609 44633 44638 44653-44654 44658 44661 44669 44702 44704 44713 44724 44730 44734 44746 44791 44799 44813 44840 44845 44899 44901-44902 44908 44913 44952 44956 44971 45011 45016 45038 45068 45081 45122 45146 45164 45178 45196 45214 45216 45242 45267 45284 45289 45293 45307 45315-45316 45330 45352 45358 45360 45371 45386 45406 45446 45454 45478 45482 45490-45491 45564 45622 45632 45640 45681 45697 45713 45725 45746 45773-45774 45812 45816 45820 45836 45847 45907 45914 45943 45957 45972 45977 46020 46030 46033 46041 46055 46090 46122 46142 46157 46200 46204 46220 46251 46258 46280 46285 46304 46310 46320 46331 46337 46342 46356 46358 46369-46370 46373-46374 46394 46404 46439 46442 46444-46445 46448 46483 46501 46511 46545 46547 46564 46568-46569 46608 46613 46617 46723 46740 46744 46761 46772 46787 46798 46835 46843 46852 46872 46886 46911 46921 46924 46963-46964 46966 47014 47016 47021 47046 47057 47062 47070 47080 47101 47106 47112 47130 47132 47151-47152 47154 47205 47231 47248-47249 47277 47288 47304 47319 47327 47375 47398 47413 47419 47425 47442 47461 47463 47466 47479 47497 47506 47529 47533-47534 47540 47564 47566 47605 47621 47630 47636 47649 47675 47708 47714 47720 47771 47805 47847 47865 47900 47912 47943 47960-47961 47969 48023 48090 48100 48106 48121 48123 48154 48187 48201 48204 48245 48259 48274 48300 48306 48315 48320 48345 48352 48362 48366 48381 48388 48398 48407 48419 48443 48528 48580 48589 48595 48603 48624 48629 48670-48671 48685 48689 48749 48758 48763 48778 48797-48798 48829 48841 48846 48854 48858 48870 48878 48885 48916 48933 48957 48962 48974 48985 48995 49017 49037 49043 49068 49071 49083 49087 49097 49141-49142 491451.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/892/105?format=asciiGamma-rayX-rayRadiodefaultJ/ApJ/892/105/4lacCombined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupmeta.idchar4FGL4FGL name (JHHMM.m+DDMMa) (Source_Name)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000) (RAJ2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (DEJ2000)degpos.eq.dec;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latdoubleSig[4/444] Source significance in {sigma} units over the 50MeV-1TeV band (Signif_Avg)stat.fit.goodness;arith.ratiodoubleF1000i[8.8e-12/9.9e-8] Integral photon flux from 1 to 100GeV (Flux1000)ph.cm**-2.s**-1phot.flux.density;em.gamma.harddoublee_F1000i[4.9e-12/6e-10] F1000i 1{sigma} error (Unc_Flux1000)ph.cm**-2.s**-1stat.errordoubleEF100[6.4e-13/1.2e-9] Energy flux from 100MeV to 100GeV obtained by spectral fitting in erg/cm^2^/s units (Energy_Flux100)mW.m**-2phot.flux.density;em.gamma.harddoublee_EF100[1.7e-13/6.5e-12] EF100 1{sigma} error (Unc_Energy_Flux100)mW.m**-2stat.errordoubleModSpectral type in the global model (PowerLaw, LogParabola, PLSuperExpCutoff) (SpectrumType)src.spType;meta.modelledcharPLGam[1.39/3.5] Photon index when fitting with PowerLaw (PL_Index)spect.indexfloate_PLGam[0.003/0.33] PLGam 1{sigma} error (Unc_PL_Index)stat.errorfloatEpiv[137.8/25099.3] Pivot Energy (Pivot_Energy)MeVphys.energydoubleLPalpha[-0.34/3.6] Photon index at Pivot_Energy ({alpha}) when fitting with LogParabola (LP_Index)spect.indexfloate_LPalpha[0.004/3] LPalpha 1{sigma} error (Unc_LP_Index)stat.errorfloatLPbeta[-0.17/1] Curvature parameter ({beta}) when fitting with LogParabola (LP_beta)stat.fit.paramfloate_LPbeta[0.001/1.5]? LPbeta 1{sigma} error (Unc_LP_beta)stat.errorfloatnullableFlags[0/2096] Analysis flags (0=no warning)meta.code.errorintClassClass designation for associated sourcesrc.classcharAssoc1Name of identified or likely associated sourcemeta.id.assoccharProbBY[0/1]? Probability of association according to the Bayesian method (ASSOC_PROB_BAY)stat.fit.goodnessfloatnullableProbLR[0/1] Probability of association according to the Likelihood Ratio method (ASSOC_PROB_LR)stat.fit.goodnessfloatCCatCounterpart catalog driving the association (Counterpart_Catalog) (1)meta.id;meta.datasetcharRACdegRight ascension of the counterpart Assoc1 (J2000) (RA_Counterpart)degpos.eq.raDECdegDeclination of the counterpart Assoc1 (J2000) (DEC_Counterpart)degpos.eq.decerrCPos[3.8e-8/2.5] 95% precision of the counterpart localization (Unc_Counterpart)degmeta.code.qual;instr.precisiondoubleRFCName of the VLBI counterpart (JHHMM+DDMM) (VLBI_Counterpart)meta.id.crosscharGaia? Name of the Gaia DR2 counterpart established via the VLBI position (Gaia_Counterpart)meta.id.crossnullableGmag[12.8/21.5]? Gaia G-band magnitude (Gaia_G_Magnitude)magphot.mag;em.optfloatnullablez[1.7e-5/4.4]? Redshift (Redshift)src.redshiftdoublenullableSEDClSED-based class (HSP, ISP or LSP) (SED_class)src.spTypecharnu[0/1.2e+19] Synchrotron-peak frequency in observer frame (nu_syn)Hzem.freq;obs.fielddoublenuFnu[0/7.9e-10] Spectral energy distribution at synchrotron-peak frequency in erg/cm^2^/s units (nuFnu_syn)mW.m**-2phot.flux.density;em.gamma.harddoubleVar[0.3/50906] Variability index (Variability_Index)src.var.indexdoublefVar[0/2.6] Fractional variability (Frac_Variability)src.var.indexfloate_fVar[0.02/10] FVar 1{sigma} error (Unc_Frac_Variability)stat.errorfloatEmax[4.1/913]? Energy of the highest-energy ULTRACLEANVETO photon with association probability P>0.95 (Highest_energy)GeVphys.energy;stat.max;em.gammadoublenullableVHEDisplay data for this Very-High-Energy AGN (link to Table 7)meta.ref.urlintnullablePecDisplay data for this non-blazar object (link to Table 6)meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/892/105/table53LAC sources not present in 4LACrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint3FGL3FGL Namemeta.id;meta.maincharCNameCounterpart Namemeta.idcharClass3LAC Class (1)src.classcharn_3FGLReason for 3LAC source not present in 4LAC (2)meta.notecharSimbadSimbad 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.mainJ/ApJ/892/105/table6Non-blazar objects and misaligned AGNGroup[hl] Latitude groupingmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint4FGL4FGL Name (JHHMM.m+DDMMa)meta.id;meta.maincharONameOther namemeta.idcharClassClass (1)src.classcharPhoton[1.44/2.85] Photon Indexspect.indexfloate_Photon[0.01/0.24] Uncertainty in Photon Indexstat.errorfloatz[0.013/1.1]? Redshiftsrc.redshiftfloatnullableDist[0.69/171]? DistanceMpcpos.distance;pos.heliocentricfloatnullableJ/ApJ/892/105/table7Properties of the 4LAC Very-High-Energy (VHE) AGNrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint4FGL4FGL Namemeta.id;meta.maincharONameVery-High-Energy Namemeta.idcharLL[*] * = low-latitude sources not in 4LACmeta.codecharClassClass (1)src.classcharSEDSED Class (2)meta.code.classcharz[0.01/0.94]? Redshiftsrc.redshiftfloatnullablePhoton[1.53/2.65] Photon Indexspect.indexfloate_Photon[0.01/0.18] Uncertainty in Photon Indexstat.errorfloatVar[1.77/17567] Variability Indexsrc.var.indexdouble