Radio-loud narrow-line Seyfert 1 as a new class of gamma-ray active galactic nuclei
Abdo, A. A. AA ; Ackermann, M. ; Ajello, M. ;
Dec - 2009
ISSN : 0004-637X ;
journal : The Astrophysical Journal

Issue : 2
type: Article Journal

Abstract
We report the discovery with Fermi/LAT of ³-ray emission from three radio-loud narrow-line Seyfert 1 galaxies: PKS 1502+036 (z = 0.409), 1H 0323+342 (z = 0.061), and PKS 2004 447 (z = 0.24). In addition to PMN J0948+0022 (z = 0.585), the first source of this type to be detected in ³ rays, they may form an emerging new class of ³-ray active galactic nuclei (AGNs). These findings can have strong implications on our knowledge about relativistic jets and the unified model of the AGN.

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