Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prompt and Delayed High-Energy Emission from Cosmological Gamma-Ray
  Bursts   In the cosmological blast-wave model for gamma ray bursts (GRBs), high energy
(> 10 GeV) gamma-rays are produced either through Compton scattering of soft
photons by ultrarelativistic electrons, or as a consequence of the acceleration
of protons to ultrahigh energies. We describe the spectral and temporal
characteristics of high energy gamma-rays produced by both mechanisms, and
discuss how these processes can be distinguished through observations with
low-threshold Cherenkov telescopes or GLAST. We propose that Compton scattering
of starlight photons by blast wave electrons can produce delayed flares of GeV
-- TeV radiation.

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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex