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

M. Ajello; R. Angioni; M. Axelsson; J. Ballet; G. Barbiellini; D. Bastieri; J. Becerra Gonzalez; R. Bellazzini; E. Bissaldi; E. D. Bloom; R. Bonino; E. Bottacini; P. Bruel; S. Buson; F. Cafardo; R. A. Cameron; E. Cavazzuti; S. Chen; C. C. Cheung; S. Ciprini; D. Costantin; S. Cutini; F. D'Ammando; P. De La Torre Luque; R. De Menezes; F. De Palma; A. Desai; N. Di Lalla; L. Di Venere; A. Domínguez; F. Fana Dirirsa; E. C. Ferrara; J. Finke; A. Franckowiak; Y. Fukazawa; S. Funk; P. Fusco; F. Gargano; S. Garrappa; D. Gasparrini; N. Giglietto; F. Giordano; M. Giroletti; D. Green; I. A. Grenier; S. Guiriec; S. Harita; E. Hays; D. Horan; R. Itoh; G. Jóhannesson; M. Kovac'Evic'; F. Krauss; M. Kreter; M. Kuss; S. Larsson; C. Leto; J. Li; I. Liodakis; F. Longo; F. Loparco; B. Lott; M. N. Lovellette; P. Lubrano; G. M. Madejski; S. Maldera; A. Manfreda; G. Martí-Devesa; F. Massaro; M. N. Mazziotta; I. Mereu; M. Meyer; G. Migliori; N. Mirabal; T. Mizuno; M. E. Monzani; A. Morselli; I. V. Moskalenko; M. Negro; R. Nemmen; E. Nuss; L. S. Ojha; R. Ojha; N. Omodei; M. Orienti; E. Orlando; J. F. Ormes; V. S. Paliya; Z. Pei; H. Pe&ntilde;a-Herazo; M. Persic; M. Pesce-Rollins; L. Petrov; F. Piron; H. Poon; G. Principe; S. Rainò; R. Rando; B. Rani; M. Razzano; S. Razzaque; A. Reimer; O. Reimer; F. K. Schinzel; D. Serini; C. Sgrò; E. J. Siskind; G. Spandre; P. Spinelli; D. J. Suson; Y. Tachibana; D. J. Thompson; D. F. Torres; E. Torresi; E. Troja; J. Valverde; P. Van Zyl; M. Yassine

doi:10.3847/1538-4357/ab791e

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

M. Ajello
, R. Angioni
, M. Axelsson
, J. Ballet
, G. Barbiellini
, D. Bastieri
, J. Becerra Gonzalez
, R. Bellazzini
, E. Bissaldi
, E. D. Bloom
, R. Bonino
, E. Bottacini
, P. Bruel
, S. Buson
, F. Cafardo
, R. A. Cameron
, E. Cavazzuti
, S. Chen
, C. C. Cheung
, S. Ciprini

D. Costantin, S. Cutini, F. D'Ammando, P. De La Torre Luque, R. De Menezes, F. De Palma, A. Desai, N. Di Lalla, L. Di Venere, A. Domínguez, F. Fana Dirirsa, E. C. Ferrara, J. Finke, A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, S. Garrappa, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, D. Green, I. A. Grenier, S. Guiriec, S. Harita, E. Hays, D. Horan, R. Itoh, G. Jóhannesson, M. Kovac'Evic', F. Krauss, M. Kreter, M. Kuss, S. Larsson, C. Leto, J. Li, I. Liodakis, F. Longo, F. Loparco, B. Lott, M. N. Lovellette, P. Lubrano, G. M. Madejski, S. Maldera, A. Manfreda, G. Martí-Devesa, F. Massaro, M. N. Mazziotta, I. Mereu, M. Meyer, G. Migliori, N. Mirabal, T. Mizuno, M. E. Monzani, A. Morselli, I. V. Moskalenko, M. Negro, R. Nemmen, E. Nuss, L. S. Ojha, R. Ojha, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, V. S. Paliya, Z. Pei, H. Peña-Herazo, M. Persic, M. Pesce-Rollins, L. Petrov, F. Piron, H. Poon, G. Principe, S. Rainò, R. Rando, B. Rani, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, F. K. Schinzel, D. Serini, C. Sgrò, E. J. Siskind, G. Spandre, P. Spinelli, D. J. Suson, Y. Tachibana, D. J. Thompson, D. F. Torres, E. Torresi, E. Troja, J. Valverde, P. Van Zyl, M. Yassine

Physics

Clemson University
Italian Space Agency
National Institute for Nuclear Physics
Stockholm University
KTH Royal Institute of Technology
Université Paris Diderot
University of Trieste
University of Padua
Instituto de Astrofísica de Canarias
Polytechnic University of Bari
SLAC National Accelerator Laboratory
University of Turin
Laboratoire Leprince-Ringuet
University of Würzburg
Universidade de São Paulo
Naval Research Laboratory
National Institute for Astrophysics
Complutense University
University of Johannesburg
NASA Goddard Space Flight Center
German Electron Synchrotron
Hiroshima University
Friedrich-Alexander University Erlangen-Nürnberg
Max Planck Institute for Physics (Werner Heisenberg Institute)
George Washington University
Tokyo Institute of Technology
Bisei Astronomical Observatory
University of Iceland
Pennsylvania State University
North West University
Oskar Klein Centre
Dalarna University
Université de Bordeaux
University of Pisa
University of Innsbruck
Istituto Nazionale di Astrofisica-Osservatorio Astrofisico di Torino
University of Perugia
University of Bologna
University of Maryland Baltimore County
Université Montpellier 2
University of Denver
Instituto Nacional de Astrofisica Optica y Electronica
Osservatorio Astronomico di Trieste
Korea Astronomy and Space Science Institute
National Science Foundation
University of New Mexico
NYCB Real-Time Computing Inc.
Purdue University Northwest
Autonomous University of Barcelona
ICREA
Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
University of Maryland
National Research Foundation
University of the Witwatersrand
Square Kilometre Array

Research output: Contribution to journal › Article › peer-review

320 Citations (Scopus)

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 2863 objects located at high Galactic latitudes (|b| > 10°). 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, 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 BLQLacs do, confirming previous findings. All AGNs detected by ground-based atmospheric Cerenkov telescopes are also found in the 4LAC.

Original language	English
Article number	105
Journal	Astrophysical Journal
Volume	892
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ab791e
Publication status	Published - 1 Apr 2020

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/ab791e

Cite this

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., ... Yassine, M. (2020). The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope. Astrophysical Journal, 892(2), Article 105. https://doi.org/10.3847/1538-4357/ab791e

@article{4aba3a2c1622485d829df0d27785b76b,

title = "The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope",

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 2863 objects located at high Galactic latitudes (|b| > 10°). 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, 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 BLQLacs do, confirming previous findings. All AGNs detected by ground-based atmospheric Cerenkov telescopes are also found in the 4LAC.",

author = "M. Ajello and R. Angioni and M. Axelsson and J. Ballet and G. Barbiellini and D. Bastieri and \{Becerra Gonzalez\}, J. and R. Bellazzini and E. Bissaldi and Bloom, \{E. D.\} and R. Bonino and E. Bottacini and P. Bruel and S. Buson and F. Cafardo and Cameron, \{R. A.\} and E. Cavazzuti and S. Chen and Cheung, \{C. C.\} and S. Ciprini and D. Costantin and S. Cutini and F. D'Ammando and \{De La Torre Luque\}, P. and \{De Menezes\}, R. and \{De Palma\}, F. and A. Desai and \{Di Lalla\}, N. and \{Di Venere\}, L. and A. Dom{\'i}nguez and Dirirsa, \{F. Fana\} and Ferrara, \{E. C.\} and J. Finke and A. Franckowiak and Y. Fukazawa and S. Funk and P. Fusco and F. Gargano and S. Garrappa and D. Gasparrini and N. Giglietto and F. Giordano and M. Giroletti and D. Green and Grenier, \{I. A.\} and S. Guiriec and S. Harita and E. Hays and D. Horan and R. Itoh and G. J{\'o}hannesson and M. Kovac'Evic' and F. Krauss and M. Kreter and M. Kuss and S. Larsson and C. Leto and J. Li and I. Liodakis and F. Longo and F. Loparco and B. Lott and Lovellette, \{M. N.\} and P. Lubrano and Madejski, \{G. M.\} and S. Maldera and A. Manfreda and G. Mart{\'i}-Devesa and F. Massaro and Mazziotta, \{M. N.\} and I. Mereu and M. Meyer and G. Migliori and N. Mirabal and T. Mizuno and Monzani, \{M. E.\} and A. Morselli and Moskalenko, \{I. V.\} and M. Negro and R. Nemmen and E. Nuss and Ojha, \{L. S.\} and R. Ojha and N. Omodei and M. Orienti and E. Orlando and Ormes, \{J. F.\} and Paliya, \{V. S.\} and Z. Pei and H. Pe\ña-Herazo and M. Persic and M. Pesce-Rollins and L. Petrov and F. Piron and H. Poon and G. Principe and S. Rain{\`o} and R. Rando and B. Rani and M. Razzano and S. Razzaque and A. Reimer and O. Reimer and Schinzel, \{F. K.\} and D. Serini and C. Sgr{\`o} and Siskind, \{E. J.\} and G. Spandre and P. Spinelli and Suson, \{D. J.\} and Y. Tachibana and Thompson, \{D. J.\} and Torres, \{D. F.\} and E. Torresi and E. Troja and J. Valverde and \{Van Zyl\}, P. and M. Yassine",

year = "2020",

month = apr,

day = "1",

doi = "10.3847/1538-4357/ab791e",

language = "English",

volume = "892",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

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, De La Torre Luque, P, De Menezes, R, De Palma, F, Desai, A, Di Lalla, N, Di Venere, L, Domínguez, 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, 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, MN, Lubrano, P, Madejski, GM, Maldera, S, Manfreda, A, Martí-Devesa, G, Massaro, F, Mazziotta, MN, Mereu, I, Meyer, M, Migliori, G, Mirabal, N, Mizuno, T, Monzani, ME, Morselli, A, Moskalenko, IV, Negro, M, Nemmen, R, Nuss, E, Ojha, LS, Ojha, R, Omodei, N, Orienti, M, Orlando, E, Ormes, JF, Paliya, VS, 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, FK, Serini, D, Sgrò, 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, 'The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope', Astrophysical Journal, vol. 892, no. 2, 105. https://doi.org/10.3847/1538-4357/ab791e

TY - JOUR

T1 - The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

AU - Ajello, M.

AU - Angioni, R.

AU - Axelsson, M.

AU - Ballet, J.

AU - Barbiellini, G.

AU - Bastieri, D.

AU - Becerra Gonzalez, J.

AU - Bellazzini, R.

AU - Bissaldi, E.

AU - Bloom, E. D.

AU - Bonino, R.

AU - Bottacini, E.

AU - Bruel, P.

AU - Buson, S.

AU - Cafardo, F.

AU - Cameron, R. A.

AU - Cavazzuti, E.

AU - Chen, S.

AU - Cheung, C. C.

AU - Ciprini, S.

AU - Costantin, D.

AU - Cutini, S.

AU - D'Ammando, F.

AU - De La Torre Luque, P.

AU - De Menezes, R.

AU - De Palma, F.

AU - Desai, A.

AU - Di Lalla, N.

AU - Di Venere, L.

AU - Domínguez, A.

AU - Dirirsa, F. Fana

AU - Ferrara, E. C.

AU - Finke, J.

AU - Franckowiak, A.

AU - Fukazawa, Y.

AU - Funk, S.

AU - Fusco, P.

AU - Gargano, F.

AU - Garrappa, S.

AU - Gasparrini, D.

AU - Giglietto, N.

AU - Giordano, F.

AU - Giroletti, M.

AU - Green, D.

AU - Grenier, I. A.

AU - Guiriec, S.

AU - Harita, S.

AU - Hays, E.

AU - Horan, D.

AU - Itoh, R.

AU - Jóhannesson, G.

AU - Kovac'Evic', M.

AU - Krauss, F.

AU - Kreter, M.

AU - Kuss, M.

AU - Larsson, S.

AU - Leto, C.

AU - Li, J.

AU - Liodakis, I.

AU - Longo, F.

AU - Loparco, F.

AU - Lott, B.

AU - Lovellette, M. N.

AU - Lubrano, P.

AU - Madejski, G. M.

AU - Maldera, S.

AU - Manfreda, A.

AU - Martí-Devesa, G.

AU - Massaro, F.

AU - Mazziotta, M. N.

AU - Mereu, I.

AU - Meyer, M.

AU - Migliori, G.

AU - Mirabal, N.

AU - Mizuno, T.

AU - Monzani, M. E.

AU - Morselli, A.

AU - Moskalenko, I. V.

AU - Negro, M.

AU - Nemmen, R.

AU - Nuss, E.

AU - Ojha, L. S.

AU - Ojha, R.

AU - Omodei, N.

AU - Orienti, M.

AU - Orlando, E.

AU - Ormes, J. F.

AU - Paliya, V. S.

AU - Pei, Z.

AU - Peña-Herazo, H.

AU - Persic, M.

AU - Pesce-Rollins, M.

AU - Petrov, L.

AU - Piron, F.

AU - Poon, H.

AU - Principe, G.

AU - Rainò, S.

AU - Rando, R.

AU - Rani, B.

AU - Razzano, M.

AU - Razzaque, S.

AU - Reimer, A.

AU - Reimer, O.

AU - Schinzel, F. K.

AU - Serini, D.

AU - Sgrò, C.

AU - Siskind, E. J.

AU - Spandre, G.

AU - Spinelli, P.

AU - Suson, D. J.

AU - Tachibana, Y.

AU - Thompson, D. J.

AU - Torres, D. F.

AU - Torresi, E.

AU - Troja, E.

AU - Valverde, J.

AU - Van Zyl, P.

AU - Yassine, M.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - 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°). 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, 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 BLQLacs do, confirming previous findings. All AGNs detected by ground-based atmospheric Cerenkov telescopes are also found in the 4LAC.

AB - 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°). 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, 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 BLQLacs do, confirming previous findings. All AGNs detected by ground-based atmospheric Cerenkov telescopes are also found in the 4LAC.

UR - https://www.scopus.com/pages/publications/85084846892

U2 - 10.3847/1538-4357/ab791e

DO - 10.3847/1538-4357/ab791e

M3 - Article

AN - SCOPUS:85084846892

SN - 0004-637X

VL - 892

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 105

ER -

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

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