Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modeling the afterglow of the possible Fermi-GBM event associated with
  GW150914   We model the possible afterglow of the Fermi GBM event associated with LIGO
detection GW150914, under the assumption that the gamma-ray are produced by a
short GRB-like relativistic outflow. We model GW150914-GBM as both a weak,
on-axis short GRB and normal short GRB seen far off axis. Given the large
uncertainty in the position of GW150914, we determine that the best chance of
finding the afterglow is with ASKAP or possibly the MWA, with the flux from an
off-axis short GRB reaching 0.2 - 4 mJy (0.12 - 16 mJy) at 150 MHz (863.5 MHz)
by 1 - 12 months after the initial event. At low frequencies, the source would
evolve from a hard to soft spectrum over several months. The radio afterglow
would be detectable for several months to years after it peaks, meaning the
afterglow may still be detectable and increasing in brightness NOW (mid-July
2016). With a localization from the MWA or ASKAP, the afterglow would be
detectable at higher radio frequencies with the ATCA and in X-rays with Chandra
or XMM.

25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn