Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observations of V0332+53 during the 2015 Outburst using Fermi/GBM, MAXI,
  Swift, and INTEGRAL   We present the lightcurves, spectra, and hardness-intensity diagram (HID) of
the high mass X-ray binary V0332+53 using Fermi/GBM, MAXI, Swift/BAT, and
INTEGRAL through its 2015 Type II outburst. We observe characteristic features
in the X-ray emission (2-50 keV) due to periastron passages, the dynamical
timescale of the accretion disc, and changes within the accretion column
between a radiation-dominated flow and a flow dominated by Coulomb
interactions. Based on the HID and the light curves, the critical luminosity is
observed to decrease by ~5-7 percent during the outburst, signaling a decrease
in the magnetic field.

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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: math
32
The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: quant-ph