GCN Circular 10406

Sylvain Guiriec (UAH) and Dave Tierney (UCD/MPE)
report on behalf of the Fermi GBM Team:

"At 14:07:29 UT on 12 February 2010, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 100212A (trigger 287676444 / 100212588).

This GRB has also been detected independently with Swift/BAT and the
GBM location is consistent with the Swift/XRT location within the error bars

(Grupe et al. GCN Circ. 10401
Not found
 
 
).

The angle from the Fermi LAT boresight is 15 degrees.

The GRB duration (T90) is about 2.30+/-0.14 s (8-1000 keV).
The time-averaged spectrum from T0-0.51 s to T0+0.26 s is
adequately fit by a power law with an index of -1.62+/-0.06
(Castor C-stat 394 for 363 d.o.f.).
It is also adequately fit by a power law function with an exponential
high energy cutoff. The power law index is -1.15 +/- 0.20 and
the cutoff energy, parameterized as Epeak, is 159.30 +/- 45.10 keV
(Castor C-stat 389 for 362 d.o.f.).

The event fluence (8-1000 keV) in the T90 time interval is
(3.81+/-0.06)E-7 erg/cm^2. The 1-sec peak photon flux measured
starting from T0-0.7 s in the 8-1000 keV band is 3.16 +/- 0.22 ph/s/cm^2.

The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."