GCN Circular 16773
J. R. Cummings reports on behalf of the Swift science team: At 06:17:24 Swift-BAT rate-triggered on GRB 140901B (trigger # 611389). Fermi-GBM also triggered on this event (trigger 431245045). No source was found onboard. In ground analysis, a significant source was found at RA, Dec 112.184, -29.209, which is RA (J2000) 07h 28m 44.2s Dec (J2000) -29d 12' 31" with an estimated 90% uncertainty radius of 2.0 arcmin. This location is 3.0 degrees from the reported GBM location (http://gcn.gsfc.nasa.gov/other/431245045.fermi), within the GBM error circle. The background in BAT was high, since Swift was near the SAA. The BAT lightcurve shows a single FRED peak, with T90 about 10 +- 1 sec. The BAT spectrum with 10.0 seconds of data is best fit by a simple power- law function with a photon index of 1.20 +- 0.22. Using this model, the fluence was (9.5 +- 1.3) x 10^-7 ergs/cm^2. Errors are 90% confidence. A Swift TOO request has been submitted, but this burst is already 3.5 days old, and moreover is rather close to the Sun.