AJELLO, 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.; DOMÍNGUEZ, A.; FANA DIRIRSA, 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.; JÓHANNESSON, 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.; MARTÍ-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.; PEÑA-HERAZO, H.; PERSIC, M.; PESCE-ROLLINS, M.; PETROV, L.; PIRON, F.; POON, H.; PRINCIPE, G.; RAINÒ, S.; RANDO, R.; RANI, B.; RAZZANO, M.; RAZZAQUE, S.; REIMER, A.; REIMER, O.; SCHINZEL, F.K.; SERINI, D.; SGRÒ, 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.

doi:10.3847/1538-4357/ab791e

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Astrophys.J.. 2020, vol. 892, p. 105

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The 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 4 years 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 50 MeV to 1 TeV. 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 (BL Lacs), 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 Cherenkov telescopes are also found in the 4LAC.< Réduire

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The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

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