TITLE: GCN CIRCULAR NUMBER: 14329 SUBJECT: GRB 130325A: Fermi GBM detection DATE: 13/03/25 18:55:30 GMT FROM: David Tierney at UCD D. Tierney (UCD) reports on behalf of the Fermi GBM Team: "At 04:51:54.30 UT on 25 March 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 130325A (trigger 385879917 / 130325203). The on-ground calculated location, using the GBM trigger data, is RA = 130.71, DEC = -21.12 (J2000 degrees, equivalent to 08 h 42 m, -21 d 07 '), with an uncertainty of 2.15 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 51.0 degrees. The GBM light curve consists of a single bright pulse with a duration (T90) of 9.7 s (50-300 keV). The time-averaged spectrum from T0+0.003 s to T0+9.216 s is best fit by a Band function with Epeak = 202.20 (+17.50/-15.60) keV, alpha = -0.73 (+0.06/-0.05), and beta = -2.18 (+0.09/-0.12). The event fluence (10-1000 keV) in this time interval is (8.25 +/- 0.27)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1.8 s in the 10-1000 keV band is 12.9 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."