GCN Circular 28120
Subject
GRB 200716A: Fermi GBM detection
Date
2020-07-16T20:57:27Z (4 years ago)
From
Christian Malacaria at NASA-MSFC/USRA <cmalacaria@usra.edu>
C. Malacaria (NASA-MSFC/USRA), E. Bissaldi (Politecnico and INFN Bari),
R. Dunwoody (UCD), J. Mangan (UCD) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 01:26:37.76 UT on 16 July 2020, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located GRB 200716A (trigger 616555602 / 200716060) ,
which also triggered AGILE (Ursi A. et al., GCN #28116)
and AstroSat (Gupta et al., GCN #28117).
The Fermi GBM Final Real-time Localization is reported in GCN #28109.
The angle from the Fermi LAT boresight at the GBM trigger time is 76 degrees.
The GBM light curve shows multiple peaks with
a duration (T90) of about 45 s (50-300 keV).
The time-averaged spectrum from T0-9.5 s to T0+59.1 s is
best fit by a Comptonized model with Epeak = 456 +/- 17 keV
and alpha = -0.97 +/- 0.01 .
The event fluence (10-1000 keV) in this time interval is
(5.986 +/- 0.041)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+31 s in the 10-1000 keV band
is 24.0 +/- 0.4 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/"