Flaring Active Galactic Nuclei. The cases of 3C 279 and PMN J0948+0022 as seen by the Fermi-LAT

D'Ammando, F. (2011) Flaring Active Galactic Nuclei. The cases of 3C 279 and PMN J0948+0022 as seen by the Fermi-LAT. Il nuovo cimento C, 34 (3). pp. 203-209. ISSN 1826-9885

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Active Galactic Nuclei (AGNs) exhibit variability across the entire electromagnetic spectrum with distinct flaring episodes at different frequencies. The high sensitivity and nearly uniform sky coverage of the Large Area Telescope on board the Fermi satellite make it a powerful tool for monitoring a large number of AGNs over long timescales. This allowed us to detect several flaring AGNs in γ rays, triggering dedicated multifrequency campaigns on these sources from radio to TeV energies. We discuss the results for two different types of flaring AGN: the flat spectrum radio quasar 3C 279, in particular the coincidence of a γ-ray flare from this source with the drastic change of the optical polarization angle, and the first γ-ray flare from a radio-loud narrow-line Seyfert 1, PMN J0948+0022.

Item Type: Article
Uncontrolled Keywords: Astronomical observations: γ-ray ; Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei)
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 06 Apr 2020 18:40
Last Modified: 06 Apr 2020 18:40
URI: http://eprints.bice.rm.cnr.it/id/eprint/17268

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