Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finding short GRB remnants in globular clusters: the VHE gamma-ray
  source in Terzan 5   Globular cluster are believed to boost the rate of compact binary mergers
which may launch a certain type of cosmological gamma-ray bursts (GRBs).
Therefore globular clusters appear to be potential sites to search for remnants
of such GRBs. The very-high-energy (VHE) gamma-ray source HESS J1747-248
recently discovered in the direction of the Galactic globular cluster Terzan 5
is investigated for being a GRB remnant. Signatures created by the
ultra-relativistic outflow, the sub-relativistic ejecta and the ionizing
radiation of a short GRB are estimated for an expected age of such a remnant of
t > 10^4 years. The kinetic energy of a short GRB could roughly be adequate to
power the VHE source in a hadronic scenario. The age of the proposed remnant
estimated from its extension possibly agrees with the occurrence of such events
in the Galaxy. Sub-relativistic merger ejecta could shock-heat the ambient
medium. Further VHE observations can probe the presence of a break towards
lower energies expected for particle acceleration in ultra-relativistic shocks.
Deep X-ray observations would have the potential to examine the presence of
thermal plasma heated by the sub-relativistic ejecta. The identification of a
GRB remnant in our own Galaxy may also help to explore the effect of such a
highly energetic event on the Earth.

14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph