GCN Circular 16152
Subject
GRB 140423A: Fermi GBM observation
Date
2014-04-23T15:29:40Z (10 years ago)
From
Andreas von Kienlin at MPE <azk@mpe.mpg.de>
A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team:
"At 08:32:38.54 UT on 23 April 2014, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 140423A (trigger 419934761 / 140423356)
which was also detected by the Swift/BAT (Sonbas et al. 2014, GCN 16142)
The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight is 44 degrees.
The GBM light curve shows a multiple-peak structure
with a duration (T90) of about 95 s (50-300 keV).
The time-averaged spectrum from T0-61.440 s to T0+32.768 s is
best fit by a Band function with Epeak = 125 +/- 9 keV,
alpha = -0.25 +/- 0.11, and beta = -1.97 +/- 0.06.
The event fluence (10-1000 keV) in this time interval is
(2.0 +/-0.1)E-05 erg/cm^2. The 1.024-sec peak photon flux measured
starting from T0+5.44 s in the 10-1000 keV band
is 3.0 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."