TITLE: GCN CIRCULAR NUMBER: 13872 SUBJECT: GRB 121012A: Fermi GBM detection DATE: 12/10/15 18:46:05 GMT FROM: Veronique Pelassa at UAH V. Pelassa (UAH) reports on behalf of the Fermi GBM Team: "At 17:22:16.39 UT on 12 october 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 121012A (trigger 371755339 / 121012724). The on-ground calculated location, using the GBM trigger data, is RA = 33.4, DEC = +14.6 (J2000 degrees, equivalent to 02 h 14 m, 14 d 24 '), with an uncertainty of 6.8 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which is currently estimated to be 2 to 3 degrees). The angle from the Fermi LAT boresight is 75 degrees. The GBM light curve consists of a single pulse with a duration (T90) of about 0.45 s (50-300 keV). The time-averaged spectrum from T0-0.128 s to T0+0.320 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -0.47 +/- 0.11 and the cutoff energy, parameterized as Epeak, is 540 +/- 70 keV (Castor statistics 708.86 for 729 d.o.f.). The event fluence (10-1000 keV) in this time interval is (1.15 +/- 0.07)E-06 erg/cm^2. The 64-msec peak photon flux measured starting from T0+0.064 s in the 10-1000 keV band is 12.4 +/- 1.1 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."