[vsnet-grb-info 25674] GRB 200514B: Fermi GBM observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27774
SUBJECT: GRB 200514B: Fermi GBM observation
DATE:    20/05/21 15:37:06 GMT
FROM:    Elisabetta Bissaldi at INFN,Bari  <elisabetta.bissaldi at ba.infn.it>

E. Bissaldi (Politecnico and INFN Bari), C. Malacaria (NASA/MSFC-USRA),
S. Poolakil (UAH) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:


"At 09:07:37.12 UT on 14 May 2020, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located GRB 200514B (trigger 611140062 / 200514380).
The GBM on-ground location was reported in GCN #27736 and is consistent
with the position triangulated by the IPN (Svinkin et al., 2020, GCN #27755).

The angle from the Fermi LAT boresight at the GBM trigger time is 63 degrees.

The GBM light curve shows a structured emission episode
with a duration (T90) of about 1.7 s (50-300 keV).
The time-averaged spectrum from T0-0.380 s to T0+0.260 s is
adequately fit by a power law function with an exponential
high-energy cutoff.  The power law index is -1.06 +/- 0.11 and
the cutoff energy, parameterized as Epeak, is 1700 +/- 900 keV.

The event fluence (10-1000 keV) in this time interval is
(4.8 +/- 0.6)E-07 erg/cm^2. The 64-ms peak photon flux measured
starting from T0-0.32 s in the 10-1000 keV band
is 3.1 +/- 0.8 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/"