Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NuSTAR observations of Mrk 766: distinguishing reflection from
  absorption   We present two new NuSTAR observations of the narrow line Seyfert 1 (NLS1)
galaxy Mrk 766 and give constraints on the two scenarios previously proposed to
explain its spectrum and that of other NLS1s: relativistic reflection and
partial covering. The NuSTAR spectra show a strong hard (>15 keV) X-ray excess,
while simultaneous soft X-ray coverage of one of the observations provided by
XMM-Newton constrains the ionised absorption in the source. The pure reflection
model requires a black hole of high spin ($a>0.92$) viewed at a moderate
inclination ($i=46^{+1}_{-4}$ degrees). The pure partial covering model
requires extreme parameters: the cut-off of the primary continuum is very low
($22^{+7}_{-5}$ keV) in one observation and the intrinsic X-ray emission must
provide a large fraction (75%) of the bolometric luminosity. Allowing a hybrid
model with both partial covering and reflection provides more reasonable
absorption parameters and relaxes the constraints on reflection parameters. The
fractional variability reduces around the iron K band and at high energies
including the Compton hump, suggesting that the reflected emission is less
variable than the continuum.

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The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
3
The categories of this paper are: physics