Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The properties of prompt emission in short GRBs with extended emission
  observed by {\em Fermi}/GBM   Short GRBs with extended emission (EE) that are composed initially of a
short-hard spike and followed by a long-lasting EE, are thought to be
classified as a subsection of short GRBs. The narrow energy band available
during the {\em Swift} era combined with a lack of spectral information
prevented discovery of the intrinsic properties of those events. In this paper,
we performed a systematic search of short GRBs with EE by using all available
{\em Fermi}/GBM data. The search identified 26 GBM-detected short GRBs with EE
that are similar to GRB 060614 observed by {\em Swift}/BAT. We focus on
investigating the spectral and temporal properties for both the hard spike and
the EE components of all 26 GRBs, and explore differences and possible
correlations between them. We find that while the peak energy ($E_{\rm p}$) of
the hard spikes is a little bit harder than that of the EE, but their fluences
are comparable. The harder $E_{\rm p}$ seems to correspond to a larger fluence
and peak flux with a large scatter for both the hard spike and EE components.
Moreover, the $E_{\rm p}$ of both the hard spikes and EE are compared to other
short GRBs. Finally, we also compare the properties of GRB 170817A with those
short GRBs with EE and find no significant statistical differences between
them. We find that GRB 170817A has the lowest $E_{\rm p}$, likely because it
was off-axis.

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The categories of this paper are: stat
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The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an