A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei -- Preliminary Results

TL;DR

This paper compiles a new list of gamma-ray jetted AGN from Fermi LAT data, updating classifications and redshifts, and introduces new AGN subclasses, aiming to improve calibration of jet power.

Contribution

It provides a revised catalog of gamma-ray jetted AGN with updated classifications, redshifts, and new object classes, enhancing the understanding of AGN populations.

Findings

Flat-spectrum radio quasars and BL Lacs dominate

Significant increase in misaligned AGN and Seyfert galaxies

Introduction of changing-look AGN and ambiguous sources

Abstract

We are compiling a new list of gamma-ray jetted active galactic nuclei (AGN), starting from the fourth catalog of point sources of the Fermi Large Area Telescope (LAT). Our aim is to prepare a list of jetted AGN with known redshifts and classifications to be used to calibrate jet power. We searched in the available literature for all the published optical spectra and multiwavelength studies useful to characterize the sources. We found new, missed, or even forgotten information leading to a substantial change in the redshift values and classification of many sources. We present here the preliminary results of this analysis and some statistics based on the gamma-ray sources with right ascension within the interval $0^{\rm h}-12^{\rm h}$ (J2000). Although flat-spectrum radio quasars and BL Lac objects are still the dominant populations, there is a significant increase in the number of other objects, such as misaligned AGN, narrow-line Seyfert 1 galaxies, and Seyfert galaxies. We also introduced two new classes of objects: changing-look AGN and ambiguous sources. About one third of the sources remain unclassified.