GCN Circular 24596
A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team: "At 07:24:57.34 UT on 19 May 2019, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GGRB 190519A (trigger 579943502 / 190519309), which was also detected by the Swift/BAT (Ukwatta et al. 2019, GCN 24595). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight at the GBM trigger time is 86.4 degrees. The GBM light curve shows a multi-peaked structure with a duration (T90) of about 46 s (50-300 keV). The time-averaged spectrum from T0-3.072 s to T0+50.177 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.06 +/- 0.02 and the cutoff energy, parameterized as Epeak, is 112 +/- 3 keV The event fluence (10-1000 keV) in this time interval is (3.16 +/- 0.04)E-05 erg/cm^2. The 1.024 sec peak photon flux measured starting from T0+41.9847 s in the 10-1000 keV band is 35.8 +/- 0.6 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 108 +/- 3 keV, alpha = -1.04 +/- 0.03 and beta = -3.1 +/- 0.3. 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/"