Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray nova MAXI J1828-249. Evolution of the broadband spectrum during
  its 2013-2014 outburst   Based on data from the SWIFT, INTEGRAL, MAXI/ISS orbital observatories, and
the ground-based RTT-150 telescope, we have investigated the broadband (from
the optical to the hard X-ray bands) spectrum of the X-ray nova MAXI J1828-249
and its evolution during the outburst of the source in 2013-2014. The optical
and infrared emissions from the nova are shown to be largely determined by the
extension of the power-law component responsible for the hard X-ray emission.
The contribution from the outer cold regions of the accretion disk, even if the
X-ray heating of its surface is taken into account, turns out to be moderate
during the source's "high" state (when a soft blackbody emission component is
observed in the X-ray spectrum) and is virtually absent during its "low"
("hard") state. This result suggests that much of the optical and infrared
emissions from such systems originates in the same region of main energy
release where their hard X-ray emission is formed. This can be the Compton or
synchro-Compton radiation from a high-temperature plasma in the central
accretion disk region puffed up by instabilities, the synchrotron radiation
from a hot corona above the disk, or the synchrotron radiation from its
relativistic jets.

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The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
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The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
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The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs