TITLE: GCN CIRCULAR NUMBER: 11926 SUBJECT: GRB 110412A: Fermi GBM observation DATE: 11/04/12 13:16:29 GMT FROM: Arne Rau at MPE Arne Rau (MPE) reports on behalf of the Fermi GBM Team: "At 07:33:35.71 UT on 12 April 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 110412A (trigger 07:33:35.71 / 110412315) which was also detected by the Swift/BAT (Gelbord et al. 2011, GCN 11922). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 53 degrees. The GBM light curve shows a single peak with a duration (T90) of about 16 s (50-300 keV). The time-averaged spectrum from T0-1.5 s to T0+18.9 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.7 +/- 0.1 and the cutoff energy, parameterized as Epeak, is 87 +/- 5 keV The event fluence (10-1000 keV) in this time interval is (2.2 +/- 0.1)E-06 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+5.8 s in the 10-1000 keV band is 2.7 +/- 0.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."