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

Ajello M, Angioni R, Axelsson M, Ballet J, Barbiellini G, Bastieri D, Becerra Gonzalez J, Bellazzini R, Bissaldi E, Bloom ED, Bonino R, Bottacini E, Bruel P, Buson S, Cafardo F, Cameron RA, Cavazzuti E, Chen S, Cheung CC, Ciprini S, Costantin D, Cutini S, D'Ammando F, Luque PDLT, De Menezes R, De Palma F, Desai A, Di Lalla N, Di Venere L, Dominguez A, Dirirsa FF, Ferrara EC, 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 IA, 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 MN, Lubrano P, Madejski GM, Maldera S, Manfreda A, Marti-Devesa G, Massaro F, Mazziotta MN, Mereu I, Meyer M, Migliori G, Mirabal N, Mizuno T, Monzani ME, Morselli A, Moskalenko I, Negro M, Nemmen R, Nuss E, Ojha LS, Ojha R, Omodei N, Orienti M, Orlando E, Ormes JF, Paliya VS, 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 FK, Serini D, Sgro C, Siskind EJ, Spandre G, Spinelli P, Suson DJ, Tachibana Y, Thompson DJ, Torres DF, Torresi E, Troja E, Valverde J, Van Zyl P, Yassine M (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Book Volume: 892

Journal Issue: 2

DOI: 10.3847/1538-4357/ab791e

Abstract

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 . It includes 85% more sources than the previous 3LAC catalog based on 4 yr 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, 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.

Authors with CRIS profile

Involved external institutions

Italian Space Agency / Agenzia Spaziale Italiana (ASI) Italy (IT) École Polytechnique - Université Paris-Saclay France (FR) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) Italy (IT) Bisei Astronomical Observatory (BAO) Japan (JP) Tokyo Institute of Technology Japan (JP) University of Bari Aldo Moro / Università degli Studi di Bari Aldo Moro Italy (IT) Deutsches Elektronen-Synchrotron DESY Germany (DE) Max-Planck-Institut für Physik (Werner-Heisenberg-Institut, MPP) / Max Planck Institute for Physics Germany (DE) Clemson University United States (USA) (US) Pennsylvania State University (Penn State) United States (USA) (US) University of Iceland (UI) / Háskóli Íslands Iceland (IS) National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) Italy (IT) Stanford University United States (USA) (US) Julius-Maximilians-Universität Würzburg Germany (DE) Universidad Complutense de Madrid (UCM) Spain (ES) National Aeronautics and Space Administration (NASA) United States (USA) (US) University of Padua / Universita degli Studi di Padova Italy (IT) University of Turin / Università degli Studi di Torino (UNITO) Italy (IT) U.S. Naval Research Laboratory United States (USA) (US) University of Johannesburg South Africa (ZA) Instituto de Astrofísica de Canarias (IAC) Spain (ES) Hiroshima University Japan (JP) Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH) Sweden (SE) Institut national de physique nucléaire et de physique des particules (IN2P3) France (FR) University of São Paulo / Universidade de São Paulo (USP) Brazil (BR) University of Bologna / Università di Bologna Italy (IT) University of Montpellier / Université Montpellier France (FR) Hartebeesthoek Radio Astronomy Observatory (HartRAO) South Africa (ZA) Leopold-Franzens-Universität Innsbruck / University of Innsbruck Austria (AT) Purdue University Northwest / Purdue University Calumet United States (USA) (US) National Radio Astronomy Observatory (NRAO) United States (USA) (US) University of Denver United States (USA) (US) Stockholm University / Stockholms universitet Sweden (SE) NYCB Real-Time Computing, Inc. United States (USA) (US) Institute of Space Sciences (IEEC-CSIC) Spain (ES)

How to cite

APA:

Ajello, M., Angioni, R., Axelsson, M., Ballet, J., Barbiellini, G., Bastieri, D.,... Yassine, M. (2020). The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope. Astrophysical Journal, 892(2). https://doi.org/10.3847/1538-4357/ab791e

MLA:

Ajello, M., et al. "The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope." Astrophysical Journal 892.2 (2020).

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