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 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/"