GCN Circular 19732
Subject
GRB 160726A: Fermi GBM observation
Date
2016-07-26T08:28:00Z (8 years ago)
From
Elisabetta Bissaldi at U.Innsbruk/IAPP <Elisabetta.Bissaldi@uibk.ac.at>
R. Hamburg (UAH), E. Burns (UAH),
and E. Bissaldi (Politecnico & INFN Bari)
report on behalf of the Fermi GBM Team:
"At 01:34:07.72 UT on 26 July 2016, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 160726A (trigger 491189651 / 160726065),
which was also detected by the Swift/BAT
(Starling et al. 2016, GCN 19731).
The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi-LAT boresight at the GBM trigger time is 50 degrees.
The GBM light curve consists of two short peaks
with a duration (T90) of about 0.7 s (50-300 keV).
The time-averaged spectrum from T0-0.06 s to T0+0.77 s is
best fit by a power law function with an exponential
high-energy cutoff. The power law index is -1.0 +/- 0.1 and
the cutoff energy, parameterized as Epeak, is 540 +/- 100 keV.
The event fluence (10-1000 keV) in this time interval is
(1.01 +/- 0.05)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0-0.06 s in the 10-1000 keV band
is 5.5 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."