Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temporal Evolution of the Gamma-ray Burst Afterglow Spectrum for an
  Observer: GeV--TeV Synchrotron Self-Compton Light Curve   We numerically simulate the gamma-ray burst (GRB) afterglow emission with a
one-zone time-dependent code. The temporal evolutions of the decelerating
shocked shell and energy distributions of electrons and photons are
consistently calculated. The photon spectrum and light curves for an observer
are obtained taking into account the relativistic propagation of the shocked
shell and the curvature of the emission surface. We find that the onset time of
the afterglow is significantly earlier than the previous analytical estimate.
The analytical formulae of the shock propagation and light curve for the
radiative case are also different from our results. Our results show that even
if the emission mechanism is switching from synchrotron to synchrotron
self-Compton, the gamma-ray light curves can be a smooth power-law, which
agrees with the observed light curve and the late detection of a 32 GeV photon
in GRB 130427A. The uncertainty of the model parameters obtained with the
analytical formula is discussed, especially in connection with the closure
relation between spectral index and decay index.

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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
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The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
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The categories of this paper are: math-ph
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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: funct-an
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys