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

Abstract

We considered the fourth catalog of gamma-ray point sources produced by the Fermi Large Area Telescope (LAT) and selected only jetted active galactic nuclei (AGN) or sources with no specific classification, but with a low-frequency counterpart. Our final list is composed of 2980 gamma-ray point sources. We then searched for optical spectra in all the available literature and publicly available databases, to measure redshifts and to confirm or change the original LAT classification. Our final list of gamma-ray emitting jetted AGN is composed of BL Lac Objects (40%), flat-spectrum radio quasars (23%), misaligned AGN (2.8%), narrow-line Seyfert 1, Seyfert, and low-ionization nuclear emission-line region galaxies (1.9%). We also found a significant number of objects changing from one type to another, and vice versa (changing-look AGN, 1.1%). About 30% of gamma-ray sources still have an ambiguous classification or lack one altogether.

18 pages, 5 figures, 1 Table. Accepted for publication on Universe, Special Issue "Black Holes and Relativistic Jets", edited by I. Dutan and N. R. MacDonald. This preprint contains only the main text. The full tables A1 and A2 are available on the journal web site (https://www.mdpi.com/2218-1997/8/11/587)

References in corpus (10)

• The diversity of quasars unified by accretion and orientation
• The Black Hole Mass Scale of Classical and Pseudo Bulges in Active Galaxies
• On the two main classes of Active Galactic Nuclei
• The Peculiar Radio-Loud Narrow Line Seyfert 1 Galaxy 1H 0323+342
• Parent population of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies
• Supernovae and their host galaxies. I. The SDSS DR8 database and statistics
• Does the Blazar Gamma-Ray Spectrum Harden with Increasing Flux? Analysis of 9 Years of EGRET Data
• Classification of New X-ray Counterparts for Fermi Unassociated Gamma Ray Sources Using the Swift X-Ray Telescope
• The Relativistic Jet Orientation and Host Galaxy of the Peculiar Blazar PKS 1413+135
• X-ray Spectra and Multiwavelength Machine Learning Classification for Likely Counterparts to Fermi 3FGL Unassociated Sources

Cited by in corpus (4)

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• General Physical Properties of Gamma-Ray-emitting Radio Galaxies
• Long-term Swift and Metsähovi monitoring of SDSS J164100.10+345452.7 reveals multi-wavelength correlated variability
• X-ray properties of two complementary samples of intermediate Seyfert galaxies