GCN Circular 23838
P. Veres and C. Meegan (both UAH) report on behalf of the Fermi GBM Team: "At 01:39:26.21 UT on 02 February 2019, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 190202A (trigger 570764371 / 190202069) which was also detected by the Swift/BAT (Lien et al., GCN 23830). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight at the GBM trigger time is 76 degrees. The GBM light curve shows a dominant pulse with some structure with a duration (T90) of about 18.4 s (50-300 keV). The time-averaged spectrum from T0-0.4 s to T0+12.8 s is best fit by a Band function with Epeak = 287 +/- 18 keV, alpha = -0.74 +/- 0.04, and beta = -2.22 +/- 0.12. The event fluence (10-1000 keV) in this time interval is (1.81 +/- 0.03)E-5 erg/cm^2. The 1-sec peak photon flux measured starting from T0+5.4 s in the 10-1000 keV band is 13.6 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."