Ajello, MarcoBaldini, LucaBallet, JeanBastieri, DenisNegro, MichelaValverde, J.et al2022-10-212022-10-212022-10-06https://doi.org/10.48550/arXiv.2209.12070http://hdl.handle.net/11603/26213Authors: Marco Ajello, Luca Baldini, Jean Ballet, Denis Bastieri, Josefa Becerra Gonzalez, Ronaldo Bellazzini, Alessandra Berretta, Elisabetta Bissaldi, Raffaella Bonino, Ari Brill, Philippe Bruel, Sara Buson, Regina Caputo, Patrizia Caraveo, Teddy Cheung, Graziano Chiaro, Nicolo Cibrario, Stefano Ciprini, Milena Crnogorcevic, Sara Cutini, Filippo D'Ammando, Salvatore De Gaetano, Niccolo Di Lalla, Leonardo Di Venere, Alberto Dominguez, Vandad Fallah Ramazani, Elizabeth Ferrara, Alessio Fiori, Yasushi Fukazawa, Stefan Funk, Piergiorgio Fusco, Viviana Gammaldi, Fabio Gargano, Simone Garrappa, Dario Gasparrini, Nico Giglietto, Francesco Giordano, Marcello Giroletti, David Green, Isabelle Grenier, Sylvain Guiriec, Deirdre Horan, Xian Hou, Taishu Kayanoki, Michael Kuss, Stefan Larsson, Luca Latronico, Tiffany Lewis, Jian Li, Ioannis Liodakis, Francesco Longo, Francesco Loparco, Benoit Lott, Michael Lovellette, Pasquale Lubrano, Grzegorz Madejski, Simone Maldera, Alberto Manfreda, Guillem Marti-Devesa, Mario Nicola Mazziotta, Isabella Mereu, Peter Michelson, Nestor Mirabal, Warit Mitthumsiri, Tsunefumi Mizuno, Maria Elena Monzani, Aldo Morselli, Igor Moskalenko, Michela Negro, Roopesh Ojha, Monica Orienti, Elena Orlando, Jonathan F. Ormes, Zhiyuan Pei, Harold A. Pena-Herazo, Massimo Persic, Melissa Pesce-Rollins, Vahe Petrosian, Roberta Pillera, Helen Poon, Troy Porter, Giacomo Principe, Silvia Raino, Riccardo Rando, Bindu Rani, Massimiliano Razzano, Soebur Razzaque, Anita Reimer, Olaf Reimer, Jeff Scargle, Lorenzo Scotton, Davide Serini, Carmelo Sgro, Eric J. Siskind, Gloria Spandre, Paolo Spinelli, Dan Suson, Hiro Tajima, Diego F. Torres, J. Valverde, H. Yassin, and G. ZaharijasAn 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>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,13 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.Attribution 4.0 International (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/Text