BeppoSAX observations of Mrk 841 and Mrk 335

Citation
S. Bianchi et al., BeppoSAX observations of Mrk 841 and Mrk 335, ASTRON ASTR, 376(1), 2001, pp. 77-84
Citations number
32
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY & ASTROPHYSICS
ISSN journal
14320746 → ACNP
Volume
376
Issue
1
Year of publication
2001
Pages
77 - 84
Database
ISI
SICI code
1432-0746(200109)376:1<77:BOOM8A>2.0.ZU;2-2
Abstract
We present and discuss BeppoSAX observations of Mrk 841 and Mrk 335, two Se yfert 1 galaxies in which previous observations have established the presen ce of soft excesses. We confirm the soft excess in both sources, even if fo r Mrk 841 a warm absorber provides a fit almost as good as the one with a t rue excess. As far as the hard X-ray continuum is concerned, a Comptonizati on model provides a fit as good as a power law and a physically sound solut ion for Mrk 841. For Mrk 335, the Comptonization model gives a result which is somewhat better on statistical ground, but rather problematic on physic al ground. The most interesting results regard the reprocessing components. For Mrk 841 we find a very large reflection continuum but an almost normal iron line equivalent width even if, within the errors, a solution in which both components are a factor similar to2 larger than expected for an accre tion disc is still marginally acceptable. If this is the case, an anisotrop y of the primary emission seems the best explanation. On the contrary, in M rk 335 we find a very large iron line EW but a reflection component not acc ordingly large. In this case, the best solution seems to be in terms of ref lection from an ionized disc.