The July 2010 outburst of the NLS1 PMN J0948+0022
L. Foschini, G. Ghisellini, L. Maraschi, G. Tagliaferri, F. Tavecchio,, Y. Y. Kovalev, Yu. A. Kovalev, M. L. Lister, J. L. Richards, F. D'Ammando, D., J. Thompson, D. Donato, A. Tramacere, E. Angelakis, L. Fuhrmann, I. Nestoras,, A. Falcone, M. Hauser, S. Wagner, K. Mannheim
TL;DR
This paper reports on a multiwavelength observation of the NLS1 galaxy PMN J0948+0022 during a high activity period in 2010, revealing gamma-ray luminosity comparable to powerful blazars, indicating extreme energetic processes.
Contribution
First detailed multiwavelength campaign capturing extreme gamma-ray luminosity in an NLS1 galaxy, highlighting its blazar-like energetic capabilities.
Findings
Gamma-ray luminosity exceeded 10^48 erg/s, unprecedented for NLS1s.
Spectral energy distribution resembles that of powerful blazars.
The source's gamma-ray emission is among the most extreme observed in NLS1s.
Abstract
We report about the multiwavelength campaign on the Narrow-Line Seyfert 1 (NLS1) Galaxy PMN J0948+0022 (z = 0.5846) performed in 2010 July-September and triggered by high activity as measured by Fermi/LAT. The peak luminosity in the 0.1-100 GeV energy band exceeded, for the first time in this type of source, the value of 10^48 erg/s, a level comparable to the most powerful blazars. The comparison of the spectral energy distribution of the NLS1 PMN J0948+0022 with that of a typical blazar - like 3C 273 - shows that the power emitted at gamma rays is extreme.
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Radio Astronomy Observations and Technology · Neutrino Physics Research