TITLE: GCN CIRCULAR NUMBER: 19224 SUBJECT: GRB 160325A: Fermi GBM detection DATE: 16/03/25 12:53:53 GMT FROM: Oliver Roberts at UCD/Fermi O.J. Roberts (UCD) reports on behalf of the Fermi GBM Team: "At 06:59:21.51 UT on the 25th of March 2016, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 160325A (trigger 480581965 / 160325291), which was also detected by Swift (Sonbas et al. 2008, GCN 19222). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight at the GBM trigger time using the Swift XRT position is about 6 degrees. The GBM light curve consists of two main emission episodes with a duration (T90) of about 43 s (50-300 keV). The time-averaged spectrum from T0+2.3 s to T0+45.3 s is well fit by a Band function with Epeak = 235 +/- 19 keV, alpha = -0.78 +/- 0.05, and beta = -2.21 +/- 0.14. The event fluence (10-1000 keV) in this time interval is (1.91 +/- 0.04) E-05 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+9.5 s in the 10-1000 keV band is 8.5 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."