Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BeppoSAX observations of Narrow-Line Seyfert 1 galaxies: II. Ionized
  iron features in Arakelian 564   The BeppoSAX observations of the bright Narrow-Line Seyfert 1 galaxy Ark 564
are presented along with a high quality optical spectrum taken at the 1.5m
telescope at La Silla. The 0.1-10 keV X-ray spectrum is characterized by a
strong soft component which is best described by blackbody-like emission with a
temperature of about 160 eV. At higher energies a steep (Gamma = 2.4) power-law
tail is present. There is evidence of an ionized reflector in the form of an
iron line and edge. We do not find significant evidence of soft X-ray features
if the spectrum is modelled with a two component continuum. The optical and
X-ray spectral properties support the hypothesis of a high accretion rate onto
a low mass black hole.

9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph