Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 22043

Fermi GBM Observations of IceCube-171015A
2017-10-23T01:11:41Z (7 years ago)
Rachel Hamburg at UAH <>
R. Hamburg (UAH) and A. Goldstein (USRA) report on behalf
of the Fermi GBM team:

We have searched the Fermi Gamma-ray Burst Monitor data
for a gamma-ray counterpart to the IceCube neutrino 171015A
(GCN 22016). The location of the neutrino was observed by
GBM with good geometry.

There were no associated on-board triggers +/- 15 hours of
the neutrino event time. The ground-based untargeted search
of GBM data (Briggs et al., in prep) did not find any candidates
+/- 1 hour of the event time. The targeted search of GBM data
([1],[2]) also searched +/- 30 s around the neutrino event time,
processing timescales of 0.256 s to 8.192 s. No significant
candidates were found.

Using a hard Band function with (Epeak, alpha, beta) =
(500 keV, -0.5,-2.5), we set 3 sigma flux-averaged upper limits
for any transient within 30 s of the neutrino event time.
Averaged over (0.1 s, 1 s, and 10 s) timescales, the
corresponding upper limits in the 10-1000 keV band are
(16.4, 4.82, 1.47) E-7 erg/s/cm^2. Using an exponentially cut-off
power law parametrized with (Epeak, index) = (566 keV, -0.42),
which represents the average GBM-triggered short GRB, the
flux-averaged upper limits are (18.0, 5.26, 1.61) E-7 erg/s/cm^2.

[1] L. Blackburn et al. 2015, ApJS 217, 8
[2] A. Goldstein et al. arXiv:1612.02395
Looking for U.S. government information and services? Visit