Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long-Term Monitoring of the Black Hole Candidate Swift J1753.5-0127 with
  INTEGRAL/SPI   The black hole candidate Swift J1753.5-0127 went into outburst in 2005 June.
Rather than fade into quiescence as most black-hole-candidate transients do, it
has remained in a low hard spectral state for most of the $\sim$ 9 years after
outburst. The persistent emission while in a hard state is reminiscent of the
black hole Cyg X-1 and the black hole candidates 1E 1740.7-2942 and GRS
1758-258. Thus far hard X-ray/soft gamma-ray results have focused mainly on the
2005 flare, with a few additional observations during 2007. Here, we present
results from INTEGRAL/SPI observations from 2005 - 2010 spanning the 22 - 650
keV energy range. Spectral analysis shows a weak high-energy excess ( $\sim$
2.9 $\sigma$) above a cutoff powerlaw model that is well fit by a powerlaw
suggesting an additional spectral component. Observations of Cyg X-1, 1E
1740.7-2942, and GRS 1758-258 have shown similar spectra requiring an
additional high-energy component The SPI results are compared to previously
reported results for Swift J1753.5-0127 as well as observations of other
sources.

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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex