Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modelling X-ray RMS spectra I: intrinsically variable AGN   We present simple XSPEC models for fitting excess variance spectra of AGN.
Using a simple Monte-Carlo approach, we simulate a range of spectra
corresponding to physical parameters varying, then calculate the resulting
variance spectra. Starting from a variable power-law, we build up a set of
models corresponding to the different physical processes that can affect the
final excess variance spectrum.
  We show that the complex excess variance spectrum of IRAS 13224-3809 can be
well described by such an intrinsic variability model, where the power-law
variability is damped by relativistic reflection and enhanced by an ultra fast
outflow. The reflection flux is correlated with that of the power-law, but not
perfectly. We argue that this correlation is stronger at high frequencies,
where reverberation lags are detected, while excess variance spectra are
typically dominated by low frequency variability.

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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
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The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph