GCN Circular 26656
Subject
IceCube-200107A: Upper limits from Fermi-GBM Observations
Event
Date
2020-01-07T18:28:26Z (6 years ago)
From
Peter Veres at UAH <veresp@gmail.com>
P. Veres (UAH) reports on behalf of the Fermi-GBM team:
For the IceCube high-energy neutrino candidate event IceCube-200107A (GCN
26655), at the event time Fermi-GBM was observing the reported neutrino
location at:
RA: 148.18 (+ 2.20 - 1.83 deg 90% PSF containment) J2000
Dec: 35.46 (+ 1.10 - 1.22 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-200107A.
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: 6.7 15 25
1.024 s: 2.1 4.3 7.2
8.192 s: 0.79 1.2 1.8