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The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope -- Data Release 3

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arxiv 2209.12070 v2 pith:CVZBCK6R submitted 2022-09-24 astro-ph.HE astro-ph.GA

The Fermi-LAT collaboration: Marco Ajello , Luca Baldini , Jean Ballet , Denis Bastieri , Josefa Becerra Gonzalez , Ronaldo Bellazzini , Alessandra Berretta , Elisabetta Bissaldi
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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 Janeth Valverde Hend Yassin Gabrijela Zaharijas
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classification astro-ph.HEastro-ph.GA
keywords datacatalogparametersreleaseactiveagnsareadetected
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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>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.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Radio-Gamma-Ray Properties and High-Energy Implications for Fermi Blazars

    astro-ph.HE 2026-08 conditional novelty 6.0 of 10

    Using 1,687 Fermi blazars, the paper reports a plateau in gamma-ray loudness at high synchrotron peak frequencies, interpreted as Klein-Nishina suppression yielding magnetic field constraints for HBLs.

  2. Fermi-Large Area Telescope Detection of Very High Energy (>100 GeV) Emission from Compton-Dominated Blazars

    astro-ph.HE 2026-07 accept novelty 6.0 of 10

    Systematic Fermi-LAT search detects VHE emission from 14 Compton-dominated blazars (4 new at >5σ) and constrains the emitting region to >1.1–1.4 BLR radii.

  3. Active galactic nuclei through the prism of galaxy clusters: bounds on axion-like particles

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    Stacked gamma-ray spectra of 29 AGN-cluster pairs place new bounds on axion-like particles with masses around 1 to 10 neV, improving previous limits by up to a factor of four under the assumed cluster magnetic fields.

  4. Active Galactic Nuclei as high-energy neutrino sources

    astro-ph.HE 2026-06 unverdicted novelty 2.5 of 10

    Review summarizing correlations between astrophysical neutrinos and gamma-ray/radio AGN, specific source associations, proposed production mechanisms, and future prospects.

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