Cs. Reynolds et al., X-RAY SPECTROSCOPY OF THE BROAD-LINE RADIO GALAXY 3C-111, Monthly Notices of the Royal Astronomical Society, 299(2), 1998, pp. 410-416
We present an ASCA observation of the broad-line radio galaxy 3C 111.
The X-ray spectrum is well described by a model consisting of a photoe
lectrically absorbed power-law form. The inferred absorbing column den
sity is significantly greater than expected on the basis of 21-cm meas
urements of Galactic Hr. Whilst this may be the result of intrinsic ab
sorption from a circumnuclear torus or highly warped accretion disc, i
nhomogeneities and molecular gas within the foreground giant molecular
cloud may also be responsible for some of this excess absorption. We
also claim a marginal detection of a broad iron K alpha line which is
well explained as being a fluorescent line originating from the centra
l regions of a radiatively efficient accretion disc. This line appears
weak in comparison to those found in (radio-quiet) Seyfert nuclei. We
briefly discuss the implications of this fact.