Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral and timing characterization of the X-ray source 1RXS
  J194211.9+255552   We report on the first spectral and timing characterization of the transient
X-ray source 1RXS J194211.9+255552 using all available data from the Swift
X-ray satellite. We used 10 years of hard X-ray data from the Burst Alert
Telescope (BAT) to characterize its long-term behaviour and to search for long
periodicities, finding evidence for a periodic modulation at 166.5 $\pm$ 0.5 d,
that we interpret as the orbital period of the source. The folded light curve
reveals that the X-ray emission is mostly concentrated in a restricted
phase-interval and we propose to associate 1RXS J194211.9+255552 to the class
of the Be X-ray binaries. This is also supported by the results of the spectral
analysis, where we used the BAT data and three pointed Swift/XRT observations
to characterize the X-ray broad-band spectral shape. We found mild spectral
variability in soft X-rays that can be accounted for by a varying local neutral
absorber, while the intrinsic emission is consistent with a hard power law
multiplied by a high-energy exponential cut-off as typically observed in this
class of systems.

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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio