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

Abstract

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.

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

References in corpus (20)

• Incremental Fermi Large Area Telescope Fourth Source Catalog
• An observational determination of the evolving extragalactic background light from the multiwavelength HST/CANDELS survey in the Fermi and CTA era
• The Central Engines of Fermi Blazars
• Radio galaxies of the local universe: all-sky catalog, luminosity functions, and clustering
• A Multi-epoch VLBI Survey of the Kinematics of Caltech-Jodrell Bank Flat-Spectrum Sources, Part II: Analysis of the Kinematics
• Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
• An optical overview of blazars with LAMOST I: Hunting changing-look blazars and new redshift estimates
• Gamma-ray observations of low-luminosity active galactic nuclei
• Optical spectroscopy of Blazars for the Cherenkov Telescope Array
• Optical spectroscopic observations of gamma-ray blazar candidates. IX. Optical archival spectra and further observations from SOAR and OAGH
• The sequence of Compton dominance in blazars based on data from WISE and Fermi/LAT
• Identifying the 3FHL catalog: CTIO results
• Optical spectroscopic observations of low-energy counterparts of Fermi-LAT gamma-ray sources
• The First Gamma-ray Emitting BL Lacertae Object at the Cosmic Dawn
• SDSS J211852.96-073227.5: The first non-local, interacting, late-type intermediate Seyfert galaxy with relativistic jets
• High energy emission component, population, and contribution to the extragalactic gamma-ray background of gamma-ray emitting radio galaxies
• TXS 2116$-$077: A Gamma-ray Emitting Relativistic Jet Hosted in a Galaxy Merger
• Identifying the 3FHL catalog: V. Results of the CTIO-COSMOS optical spectroscopy campaign 2019
• A blazar as the likely counterpart to 4FGL J0647.7-4418 instead of a gamma-ray binary
• A New Gamma-ray Emitting Population of FR0 Radio Galaxies

Cited by in corpus (39)

• The strange case of the transient HBL blazar 4FGL J1544.3-0649
• Gradient boosting decision trees classification of blazars of uncertain type in the fourth Fermi-LAT catalog
• The Energy Budget in the Jet of High-frequency Peaked BL Lacertae Objects
• The Physical Properties of Changing-look Blazars
• Redshift prediction of Fermi-LAT gamma-ray sources using CatBoost gradient boosting decision trees
• Classification of blazar candidates of unknown type in Fermi 4LAC by unanimous voting from multiple Machine Learning Algorithms
• Classification of the \emph{Fermi}-LAT Blazar Candidates of Uncertain type using eXtreme Gradient Boosting
• Fermi LAT AGN classification using supervised machine learning
• Exploring the Most Extreme Gamma-Ray Blazars Using Broadband Spectral Energy Distributions
• Active galactic nuclei through the prism of galaxy clusters: bounds on axion-like particles
• Multiwavelength Evidence for Two New Candidate Transitional Millisecond Pulsars in the Sub-luminous Disk State: 4FGL J0639.1--8009 and 4FGL J1824.2+1231
• On the sub-parsec scale core composition of FR 0 radio galaxies
• Testing the Blazar Sequence with Spectra of Recently Discovered Dim Blazars from the Fermi Unassociated Catalog
• Cluster analysis of the Roma-BZCAT blazars
• A Systematic Search for Spectral Hardening in Blazar Flares with the Fermi-Large Area Telescope
• Very-high-energy gamma-ray detection and long-term multi-wavelength view of the flaring blazar B2 1811+31
• Constraints on Axion-Like Particles from VERITAS Observations of a Flaring Radio Galaxy in the Perseus Cluster
• The Accretion Properties and Jet Mechanisms for the Low-Excitation Radio Galaxies
• Central Engine and Spectral Energy Distribution Properties of High Redshift Gamma Ray Blazars
• Constraints on VHE gamma-ray emission of Flat Spectrum Radio Quasars with the MAGIC telescopes
• Radio and mid-infrared properties of the blazar J1419$-$0838
• Possible Origin of a Newly Discovered GeV Gamma-ray Source Fermi J1242.5+3236
• Accretion Disc-Jet Decomposition from the Optical-Near Infrared Monitoring of Fermi Blazars
• The Statistic Analysis of GeV Spectral Breaks in Bright Gamma-Ray FSRQs
• Linking {\it Fermi} blazars and radio galaxies through accretion and jet radiation mechanisms
• VHE $\gamma$-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO
• Characterization and classification of $\gamma$-ray bursts from blazars
• Estimation of redshift and associated uncertainty of Fermi/LAT extra-galactic sources with Deep Learning
• From Equipartition to Curvature: The Spectral Evolution of 4FGL Blazars
• VLBI Observations of SN 2012au Reveal a Compact Radio Source a Decade Post Explosion
• The physical properties of candidate neutrino-emitter blazars
• Neutrinos from extreme astrophysical sources
• Intergalactic magnetic field lower limits up to the redshift $z\approx 3$
• The Gamma-ray Luminosity Function of Flat-Spectrum Radio Quasars
• Impacts of Voids, Line of Sight Interactions, and Local Emission Environment on Detectability of Gamma-Ray AGN
• SRG/eROSITA-SDSS view on the relation between X-ray and UV emission for quasars
• Testing high energy neutrino emission from the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) sources
• Sensitivity to Axion-like Particle dark matter with very-high-energy gamma-ray observations of Active Galactic Nuclei located behind Galaxy Clusters
• 1FLAT: a Firmamento-based catalog of AGN in Fermi-LAT high Galactic latitude γ-ray sources