GCN Circular 15967
Subject: GRO J1744-28: Fermi GBM observation Hoi-Fung Yu (MPE) reports on behalf of the Fermi GBM Team: "At 03:46:41.88 UT on 12 March 2014, the Fermi Gamma-Ray Burst Monitor triggered on a burst from the bursting pulsar GRO J1744-28 (trigger 416288804 / 140312157), which was also detected by Swift (Kennea et al. 2014, ATel #5845). A second burst triggered GBM at 06:55:18.28 UT. Both triggers were classified as unreliable sources by the FSW, but were indeed due to GRO J1744-28. The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight for both triggers is 58 degrees. The GBM light curve of both triggers show a single pulse with a duration of about 10 s (8-300 keV). For the first trigger, the time-averaged spectrum from T0-3.712 s to T0+6.528 s is adequately fit by a simple power law function with index -5.3 +/- 0.1. For the second trigger, the time-averaged spectrum from T0-6.432 s to T0+5.856 s is adequately fit by a blackbody with kT 4.04 +/- 0.08 keV. The spectral analysis results presented above are preliminary."