GCN Circular 32174
Subject
GRB 220606B: Fermi GBM Observation
Date
2022-06-07T16:22:44Z (3 years ago)
From
Boyan A. Hristov at UAH <bah0046@uah.edu>
B. Hristov (UAH) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 01:03:28.68 UT on 06 June 2022, the Fermi Gamma-Ray Burst Monitor
(GBM) triggered and located GRB 220606B (trigger 676170213 / 220606044),
which was also detected by the Swift/BAT-GUANO (Tohuvavohu et al. 2022,
GCN 32167).
The Fermi GBM Final Real-time Localization (GCN 32165) is consistent
with the GUANO position.
The GBM light curve shows a single peak with a duration (T90) of about
0.9 +/- 0.4 s (50-300 keV).
The time-averaged spectrum from T0-0.256 s to T0+0.768 s is best fit by
a simple power law with index = -1.28 +/- 0.07.
The event fluence (10-1000 keV) in this time interval is
(2.9 +/- 0.4)E-7 erg/cm^2. The 0.64-sec peak photon flux measured
starting from T0-0.064 s in the 10-1000 keV band is
2.8 +/- 0.9 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/"