Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of X-ray reflection features in a sample of Sy 1s observed by
  BeppoSAX   The ionized disc reflection model of Ross & Fabian is applied to a sample of
five Seyfert 1 galaxies observed by BeppoSAX. Good fits were obtained for all
the objects in the sample. NGC 4051 and Mkn 335 (usually classified as NLSy 1s)
show evidence of a highly ionized accretion disc (xi ~ 350 erg cm s^{-1} and xi
\~ 800 erg cm s^{-1}). While NGC 3783 seems to be a ``pure Sy 1'' characterized
by a highly ionized accretion disc (xi ~ 500 erg cm s^{-1}). All the sources
are consistent with having a face-on disc. The accurate determination of the
continuum emission allows us to investigate the spectral variability in the
case of Mkn 509.

29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th