TITLE: GCN CIRCULAR NUMBER: 17292 SUBJECT: GRB 150110A: Fermi GBM Detection DATE: 15/01/10 23:10:54 GMT FROM: Matthew Stanbro at UAH/Fermi Matthew Stanbro (UAH) and H.-F. Yu (MPE) report on behalf of the Fermi GBM Team: "At 10:23:38.23 UT on 10 January 2015, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 150110A (trigger 442578221 / 150110433). which was also detected by the MAXI/GSC (Negoro et al. 2015, GCN 17290) The GBM on-ground location is consistent with the MAXI/GSC position. The angle from the Fermi LAT boresight is 51 degrees. The GBM light curve consists of 2 peaks with a combined duration (T90) of about 74 s (50-300 keV). The time-averaged spectrum from T0-2.05 s to T0+73.73 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.99 +/- 0.06 and the cutoff energy, parameterized as Epeak, is 77.2 +/- 2.7 keV The event fluence (10-1000 keV) in this time interval is (2.81 +/- 0.06)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+61.1 s in the 8-1000 keV band is 7.49 +/- .286 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."