GCN Circular 11592
Subject
GRB 110119A: Fermi GBM detection
Date
2011-01-21T16:33:25Z (13 years ago)
From
Adam Goldstein at Fermi-GBM/UAH <adam.m.goldstein@msfc.nasa.gov>
A. Goldstein (UAH) reports on behalf of the Fermi GBM Team:
"At 22:21:00.17 UT on 19 January 2011, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 110119A (trigger 317168462 / 110119931)which was
also detected by the Swift/BAT (E. Troja et al. 2011, GCN 11581). The GBM
on-ground location is consistent with the Swift position. The angle from
the Fermi LAT boresight is 71 degrees.
The GBM light curve consists of ~100 s of variable outburst followed
by a small bump ~175 s after T0. The entire burst has a duration (T90)
of about 219 s (50-300 keV). The time-averaged spectrum from T0-16.4 s
to T0+62.5 s is best fit by a Band function with Epeak = 126.3 +/- 16.8 keV,
alpha = -0.60 +/- 0.13, and beta = -1.95 +/- 0.09
(C-Stat 1348 for 357 d.o.f.).
The event fluence (10-1000 keV) in this time interval is
(1.36 +/- 0.06)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+31.4 s in the 10-1000 keV band is 4.5 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."