GCN Circular 28424

R. Dunwoody (UCD), J. Mangan (UCD) and C. Meegan (UAH) report on
behalf of the Fermi GBM Team:

"At 12:48:30.03 UT on 14 September 2020, the Fermi Gamma-Ray Burst
Monitor (GBM) triggered and located GRB 200914A (trigger 621780515 /
200914534) which was also detected by INTEGRAL (S. Mereghetti et al.,
GCN 28419
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). The GBM on-ground location is consistent with the INTEGRAL
position. The on-ground calculated location, using the GBM trigger
data, is provided in GCN 28417
Not found
 
 
.

The angle from the Fermi LAT boresight at the GBM trigger time is 62 degrees.

The GBM light curve shows a long GRB with multiple features with a
duration (T90) of about 65 s (50-300 keV). The time-averaged spectrum
from T0 + 1.1 s to T0 + 24.6 s is best fit by a power law function
with an exponential high-energy cutoff.  The power law index is -0.89
+/- 0.03 and the cutoff energy, parameterized as Epeak, is 1260 +/-
140 keV.

The event fluence (10-1000 keV) in this time interval is (9.80 +/-
0.71)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from
T0 + 1.95 s in the 10-1000 keV band is 7.9 +/- 0.2 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/"