GCN Circular 33967
Subject
GRB 230614B: Fermi GBM Observation
Date
2023-06-15T14:01:13Z (2 years ago)
From
R. Hamburg at CNRS/IJCLab <rachel.k.hamburg@gmail.com>
R. Hamburg (CNRS/IJCLab) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 09:15:01.63 UT on 14 June 2023, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located GRB 230614B (trigger 708426906 / 230614385),
which was also detected by Swift/BAT-GUANO (DeLaunay et al. 2023, GCN 33960).
The Fermi GBM Final Real-time Localization was reported in GCN 33958.
The angle from the Fermi LAT boresight at the GBM trigger time is 15 degrees.
The GBM light curve consists of two main pulses with a duration (T90)
of about 15 s (50-300 keV). The time-averaged spectrum from T0-2.43 s
to T0+18.05 s is best fit by a power law function with an exponential
high-energy cutoff. The power law index is -1.18 +/- 0.05 and
the cutoff energy, parameterized as Epeak, is 115 +/- 6 keV.
The event fluence (10-1000 keV) in this time interval is
(5.94 +/- 0.16)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+1.47 s in the 10-1000 keV band
is 10.3 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog:
https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page:
https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"