Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Ordinary Short Gamma-Ray Burst with Extraordinary Implications:
  Fermi-GBM Detection of GRB 170817A   On August 17, 2017 at 12:41:06 UTC the Fermi Gamma-ray Burst Monitor (GBM)
detected and triggered on the short gamma-ray burst GRB 170817A. Approximately
1.7 s prior to this GRB, the Laser Interferometer Gravitational-Wave
Observatory (LIGO) triggered on a binary compact merger candidate associated
with the GRB. This is the first unambiguous coincident observation of
gravitational waves and electromagnetic radiation from a single astrophysical
source and marks the start of gravitational-wave multi-messenger astronomy. We
report the GBM observations and analysis of this ordinary short GRB, which
extraordinarily confirms that at least some short GRBs are produced by binary
compact mergers.

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The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
18
The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
2
The categories of this paper are: math
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an