Broadband X-ray properties of absorbed AGN
  In this paper we report on the broadband X-ray properties of a complete
sample of 33 absorbed Seyfert galaxies hard X-ray selected with integral. The
high quality broadband spectra obtained with both xmm, and integral-IBIS data
are well reproduced with an absorbed primary emission with a high energy cutoff
and its scattered fraction below 2-3 keV, plus the Compton reflection features.
A high energy cut-off is found in 30% of the sample, with an average value
below 150 keV. The diagnostic plot NH vs Fobs(2-10 keV)/F(20-100 keV) allowed
the isolation of the Compton thick objects, and may represent a useful tool for
future hard X-ray observations of newly discovered AGN. We are unable to
associate the reflection components with the absorbing gas as a torus, a more
complex scenario being necessary. In the Compton thin sources, a fraction (but
not all) of the Fe K line needs to be produced in a gas possibly associated
with the optical Broad Line Region, responsible also for the absorption. We
still need a Compton thick medium (not intercepting the line of sight) likely
associated to a torus, which contributes to the Fe line intensity and produces
the observed reflection continuum above 10 keV. The so-called Iwasawa-Taniguchi
effect can not be confirmed with our data. Finally, the comparison with a
sample of unobscured AGN shows that, type 1 and type 2 (once corrected for
absorption) Seyfert are characterized by the same nuclear/accretion properties
(luminosity, bolometric luminosity, Eddington ratio), supporting the "unified"
view.
