GCN Circular 27137
E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH) report on behalf of the Fermi GBM Team: "At 07:36:49.10 UT on 19 February 2020, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 200219A (trigger 603790614/200219317), which was also detected by the Swift/BAT (Lien et al. 2020, GCN 27125). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight at the GBM trigger time is 49 degrees. The GBM light curve consists of a single emission episode with a duration (T90) of about 1.1 s (50-300 keV). The time-averaged spectrum from T0-0.064 s to T0+0.448 s is adequately fit by a power law function with an exponential high-energy cutoff. The power law index is -0.60 +/- 0.06 and the cutoff energy, parameterized as Epeak, is 1.4 +/- 0.2 MeV. The event fluence (10-1000 keV) in this time interval is (2.8 +/- 0.1)E-06 erg/cm^2. The 64-ms peak photon flux measured starting from T0+0.192 s in the 10-1000 keV band is 16.1 +/- 1.1 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/"