TITLE: GCN CIRCULAR NUMBER: 16945 SUBJECT: GRB141022B: Fermi GBM Detection DATE: 14/10/23 19:01:08 GMT FROM: Matthew Stanbro at UAH/Fermi M. Stanbro (UAH) reports on behalf of the Fermi GBM Team: "At 02:04:40.21 UT on 22 October 2014, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 141022B (trigger 435636283 / 141022087). The trigger resulted in an Autonomous Repoint Request (ARR) that was accepted and the spacecraft slewed to the GBM in-flight location. The on-ground calculated location, using the GBM trigger data, is RA = 119.4, DEC = -75.2 (J2000 degrees, equivalent to 7h 58m, -75d 12'), with an uncertainty of 1.0 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 110 degrees. The GBM light curve consists of a single episode consisting of several pulses with a duration (T90) of about 9.2 s (50-300 keV). The time-averaged spectrum from T0+1.9 s to T0+12.2 s is well fit by a Band function with Epeak = 368.1 (+/-11.2) keV, alpha = -0.64 +/- 0.02 , and beta = -2.41 (+/-0.05). The event fluence (10-1000 keV) in this time interval is (7.87 +/- 0.07)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+3.328 s in the 10-1000 keV band is 62.9 +/- 1.2 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."