The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope -- Data Release 3
Creators: name: LAT Collaboration
name: Ajello, Marco
name: Baldini, Luca
name: Ballet, Jean
name: Bastieri, Denis
name: Gonzalez, Josefa Becerra
name: Bellazzini, Ronaldo
name: Berretta, Alessandra
name: Bissaldi, Elisabetta
name: Bonino, Raffaella
name: Brill, Ari
name: Bruel, Philippe
name: Buson, Sara
name: Caputo, Regina
name: Caraveo, Patrizia
name: Cheung, Teddy
name: Chiaro, Graziano
name: Cibrario, Nicolo
name: Ciprini, Stefano
name: Crnogorcevic, Milena
name: Cutini, Sara
name: D'Ammando, Filippo
name: De Gaetano, Salvatore
name: Di Lalla, Niccolo
name: Di Venere, Leonardo
name: Dominguez, Alberto
name: Ramazani, Vandad Fallah
name: Ferrara, Elizabeth
name: Fiori, Alessio
name: Fukazawa, Yasushi
name: Funk, Stefan
name: Fusco, Piergiorgio
name: Gammaldi, Viviana
name: Gargano, Fabio
name: Garrappa, Simone
name: Gasparrini, Dario
name: Giglietto, Nico
name: Giordano, Francesco
name: Giroletti, Marcello
name: Green, David
name: Grenier, Isabelle
name: Guiriec, Sylvain
name: Horan, Deirdre
name: Hou, Xian
name: Kayanoki, Taishu
name: Kuss, Michael
name: Larsson, Stefan
name: Latronico, Luca
name: Lewis, Tiffany
name: Li, Jian
name: Liodakis, Ioannis
name: Longo, Francesco
name: Loparco, Francesco
name: Lott, Benoit
name: Lovellette, Michael
name: Lubrano, Pasquale
name: Madejski, Grzegorz
name: Maldera, Simone
name: Manfreda, Alberto
name: Marti-Devesa, Guillem
name: Mazziotta, Mario Nicola
name: Mereu, Isabella
name: Michelson, Peter
name: Mirabal, Nestor
name: Mitthumsiri, Warit
name: Mizuno, Tsunefumi
name: Monzani, Maria Elena
name: Morselli, Aldo
name: Moskalenko, Igor
name: Negro, Michela
name: Ojha, Roopesh
name: Orienti, Monica
name: Orlando, Elena
name: Ormes, Jonathan F.
name: Pei, Zhiyuan
name: Pena-Herazo, Harold A.
name: Persic, Massimo
name: Pesce-Rollins, Melissa
name: Petrosian, Vahe
name: Pillera, Roberta
name: Poon, Helen
name: Porter, Troy
name: Principe, Giacomo
name: Raino, Silvia
name: Rando, Riccardo
name: Rani, Bindu
name: Razzano, Massimiliano
name: Razzaque, Soebur
name: Reimer, Anita
name: Reimer, Olaf
name: Scargle, Jeff
name: Scotton, Lorenzo
name: Serini, Davide
name: Sgro, Carmelo
name: Siskind, Eric J.
name: Spandre, Gloria
name: Spinelli, Paolo
name: Suson, Dan
name: Tajima, Hiro
name: Torres, Diego F.
name: Valverde, Janeth
name: Yassin, Hend
name: Zaharijas, Gabrijela
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi-Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on 12 years of E&gt;50 MeV gamma-ray data, where the spectral parameters, spectral energy distributions (SEDs), yearly light curves, and associations have been updated for all sources. The new reported AGNs include 587 blazar candidates and four radio galaxies. We describe the properties of the new sample and outline changes affecting the previously published one. We also introduce two new parameters in this release, namely the peak energy of the SED high-energy component and the corresponding flux. These parameters allow an assessment of the Compton dominance, the ratio of the Inverse-Compton to the synchrotron peak luminosities, without relying on X-ray data.
description: 13 pages, 7 figures, accepted for publication in The Astrophysical Journal Supplement Series. Fits files are available at https://fermi.gsfc.nasa.gov/ssc/data/access/lat/4LACDR3/ or alternatively at https://www.ssdc.asi.it/fermi4lac-DR3/table-4LAC-DR3-h.fits and https://www.ssdc.asi.it/fermi4lac-DR3/table-4LAC-DR3-l.fits