Basic properties of Narrow-Line Seyfert 1 Galaxies with Relativistic Jets

Authors :: Foschini, L.
Angelakis, E.
Bonnoli, G.
Braito, V.
Caccianiga, A.
Fuhrmann, L.
Gallo, L.
Ghirlanda, G.
Ghisellini, G.
Grupe, D.
Hamilton, T.
Kaufmann, S.
Komossa, S.
Kovalev, Y. Y.
Lahteenmaki, A.
Lister, M. L.
Mannheim, K.
Maraschi, L.
Mathur, S.
Peterson, B. M.
Romano, P.
Severgnini, P.
Tagliaferri, G.
Tammi, J.
Tavecchio, F.
Tibolla, O.
Tornikoski, M.
Vercellone, S.
Publication Year :: 2013
Abstract: We present the preliminary results of a survey performed with Swift to observe a sample of radio-loud Narrow-Line Seyfert 1 Galaxies (RLNLS1s). Optical-to-X-ray data from Swift are complemented with gamma-ray observations from Fermi/LAT and radio measurements available in the literature. The comparison with a sample of bright Fermi blazars indicates that RLNLS1s seem to be the low-power tail of the distribution.<br />Comment: 2 pages, 1 figure. Proceedings "X-ray Astronomy: the next 50 years" (Milano, 1-5 October 2012). To be published on Mem. SAIt. Errata-Corrige: found an error in the normalization of gamma-ray data. The old displayed values were luminosity densities (Lnu) instead of nuLnu. Now, the figures display the corrected values. Nothing changes in the concepts