BeppoSAX uncovers the hidden Seyfert 1 nucleus in the Seyfert 2 galaxy NGC2110

Citation
G. Malaguti et al., BeppoSAX uncovers the hidden Seyfert 1 nucleus in the Seyfert 2 galaxy NGC2110, ASTRON ASTR, 342(3), 1999, pp. L41-L44
Citations number
28
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
342
Issue
3
Year of publication
1999
Pages
L41 - L44
Database
ISI
SICI code
0004-6361(199902)342:3<L41:BUTHS1>2.0.ZU;2-J
Abstract
The Seyfert 2 galaxy NGC 2110 has been observed with BeppoSAX between 0.5 a nd 150keV. The high energy instrument onboard, PDS, hits succeeded in measu ring for the first time the spectrum of this source in the 13-150 keV range . The PDS spectrum, having a photon index Gamma similar or equal to 1.86 is fully compatible with that expected from a Seyfert 1 nucleus. In the frame work of unified models, the harder (Gamma similar or equal to 1.67) 2-10 ke V spectrum is well explained assuming the presence of a complex partial + t otal absorber (N-H similar or equal to 30 x 10(22)cm(-2) x similar to 25% N-H similar to x 10(22)cm(-2) x similar to 100%). The high column density of this complex absorber is consistent both with the FeKalpha line strength and with the detection of an absorption edge at E similar or equal to 7.1 keV in the power-law spectrum.