Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reflection Spectra from Photoionized Accretion Discs   We review recent progress on the modeling and use of reflection spectra from
irradiated and ionized accretion discs. On the computational side, calculations
of reflection spectra from discs with non-uniform density structure have shown
that thermal instabilities can effect the predictions. Ionized reflection
spectra have been used effectively in fitting data of Narrow-Line Seyfert 1
galaxies, and have placed constraints on the strength and shape of soft X-ray
emission lines.

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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
1
The categories of this paper are: cs
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
12
The categories of this paper are: nucl-th