GCN Circular 17891
Yu H.-F. (MPE), Younes G. (USRA at GWU), and Meegan C. (UAH) report on behalf of the Fermi GBM Team: "At 11:42:15.61 UT, on 2015 May 30, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 150530A (trigger 454678938 / 150530488) which was also detected by Swift (Starling et al. 2015, GCN 17888). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is about 46 degrees. The GBM light curve consists of two peaks with a duration (T90) of 7 s (50-300 keV). The time-averaged spectrum from T0-4.6 s to T0+6.7 s is well fit by a BAND function with Epeak = 126 +/- 14 keV, alpha = -0.8 +/- 0.1, and beta = -2.4 +/- 0.2. The event fluence (10-1000 keV) in this time interval is (4.1 +/- 0.2)E-06 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0+2.8 s in the 10-1000 keV band is 6.7 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."