GCN Circular 28894
Subject
IceCube-201114A: Upper limits from Fermi GBM Observations
Date
2020-11-15T18:37:40Z (4 years ago)
From
Suraj Poolakkil at UAH <sp0076@uah.edu>
For the IceCube high-energy neutrino candidate event IceCube-201114A
(GCN 28887), at the event time Fermi-GBM was observing the reported
neutrino location at:
RA: 105.25 (+ 1.28 - 1.12 deg 90% PSF containment) J2000
Dec: 6.05 (+ 0.95 - 0.95 deg 90% PSF containment) J2000
There was no Fermi-GBM onboard trigger around the event time of the
neutrino candidate. An automated, blind search for short gamma-ray
bursts below the onboard triggering threshold in Fermi-GBM also
identified no counterpart candidates. The GBM targeted search,
the most sensitive, coherent search for GRB-like signals,
was run from +/-30 s around the neutrino candidate time.
From this search, no significant signal was found related
to IceCube-201114A.
We set upper limits on impulsive gamma-ray emission. Using the
representative soft, normal, and hard GRB-like templates described in
arXiv:1612.02395, we set the following 3 sigma flux upper limits over
10-1000 keV (in units of 10^-7 erg/s/cm^2):
Timescale Soft Normal Hard
-------------------------------------------
0.128 s: 11.0 12.0 17.0
1.024 s: 7.7 7.1 6.7
8.192 s: 3.1 2.5 2.2
These results are preliminary.