Relativistic jets in Narrow-Line Seyfert 1
L. Foschini, E. Angelakis, G. Bonnoli, G. Calderone, M. Colpi, F., D'Ammando, D. Donato, A. Falcone, L. Fuhrmann, G. Ghisellini, G. Ghirlanda,, M. Hauser, Y.Y. Kovalev, L. Maraschi, E. Nieppola, J. Richards, A. Stamerra,, G. Tagliaferri, F. Tavecchio, D.J. Thompson, O. Tibolla
TL;DR
This paper discusses the discovery of relativistic jets in Narrow-Line Seyfert 1 galaxies through gamma-ray observations, highlighting a significant outburst in one such galaxy, PMN J0948+0022.
Contribution
It presents the first detailed gamma-ray observation of a NLS1 galaxy during an outburst, confirming the presence of relativistic jets in these systems.
Findings
Detection of gamma-ray outburst in PMN J0948+0022
Confirmation of relativistic jets in NLS1 galaxies
First observation of flux exceeding 10^-6 ph cm^-2 s^-1
Abstract
Narrow-Line Seyfert 1 (NLS1) class of active galactic nuclei (AGNs) is generally radio-quiet, but a small percent of them are radio-loud. The recent discovery by Fermi/LAT of high-energy gamma-ray emission from 4 NLS1s proved the existence of relativistic jets in these systems. It is therefore important to study this new class of gamma-ray emitting AGNs. Here we report preliminary results about the observations of the July 2010 gamma-ray outburst of PMN J0948+0022, when the source flux exceeded for the first time 10^-6 ph cm^-2 s^-1 (E > 100 MeV).
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