//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 8911 SUBJECT: GRB 090219: Fermi GBM detection DATE: 09/02/20 17:22:18 GMT FROM: Narayana Bhat at U Alabama/Huntsville/GBM P. N. Bhat (UA Huntsville) report on behalf of the Fermi GBM Team: "At 01:46:18.15 UT on 19th February, 2009, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 090219 (trigger 256700780 / 090219074). The on-ground calculated location, using the GBM trigger data, is RA = 16.4 d, DEC = +60.2 d (J2000 degrees, equivalent to 1 h 5.6 m, 60 d 12'), with an uncertainty of 7 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 137 degrees. The GBM light curve consists of 2 narrow closely spaced pulses with a duration (T90) of about 0.5 s (8-1000 keV). The time-averaged spectrum from T0-0.18 s to T0+0.46 s is adequately fit by a simple power law function with index -1.43 +/- 0.05 (chi squared 385 for 366 d.o.f.). The event fluence (8-1000 keV) in this time interval is (8.0 +/- 0.4)E-07 erg/cm^2. The X-sec peak photon flux measured starting from T0-0.18 s in the 8-1000 keV band is 7.7 +/- 0.4 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."