TITLE: GCN CIRCULAR NUMBER: 19570 SUBJECT: GRB 160624A: Fermi GBM observation DATE: 16/06/24 20:19:03 GMT FROM: Eric Burns at U of Alabama R. Hamburg (UAH) and A. von Kienlin (MPE) report on behalf of the Fermi GBM Team: "At 11:27:01.35 UT on 24 June 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 160624A (trigger 488460425 / 160624477), which was also detected by the Swift (D'Ai et al. 2016, GCN 19560) 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 consists of a single peak with a duration (T90) of about 0.4 s (50-300 keV). The time-averaged spectrum from T0-0.064 s to T0+0.192 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.40 +/- 0.28 and the cutoff energy, parameterized as Epeak, is 841 +/- 358 keV. The event fluence (10-1000 keV) in this time interval is (5.2 +/- 0.5)E-07 erg/cm^2. The 0.064-sec peak photon flux measured starting from T0+0.00 s in the 10-1000 keV band is 6.4 +/- 1.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."