3 papers
astro-ph.CO2011
X-ray selected Narrow-Line Seyfert 1 Galaxies
A. Caccianiga, P. Severgnini, R. Della Ceca +3
We present and discuss the properties of a complete and well defined sample of X-ray selected type 1 AGNs including 26 Narrow-Line Seyfert 1 and 129 Broad-Line Seyfert 1 galaxies d…
astro-ph2005
The nature of Composite Seyfert/Star-forming galaxies revealed by X-ray observations
F. Panessa, A. Wolter, S. Pellegrini +5
This paper presents new Chandra and BeppoSAX observations aimed at investigating the optical/X-ray mismatch in the enigmatic class of the Composite galaxies, discovered by a cross-…
astro-ph2002
An enshrouded AGN in the merging starburst system Arp~299 revealed by BeppoSAX
R. Della Ceca, L. Ballo, F. Tavecchio +9
Using a long (=150 ksec), broad-band (0.1--40 keV) BeppoSAX observation of the merging starburst system Arp 299 (=IC 694 + NGC 3690) we found the first unambiguous evidence of the…