[vsnet-grb-info 15454] GRB 140824B: Fermi GBM Detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16743
SUBJECT: GRB 140824B: Fermi GBM Detection
DATE:    14/08/25 16:46:21 GMT
FROM:    Binbin Zhang at UAH  <binbin.zhang at uah.edu>

Bin-Bin Zhang (UAH) reports on behalf of the Fermi GBM Team:

"At 14:33:12.04 Â UT on the 24th of August 2014, the Fermi Gamma-Ray Burst
Monitor triggered and located GRB 140824B (trigger 430583595 / 140824606), 
which has been followed up by MASTER II robotic telescope (Tyurina et al. 
GCNs 16740, 16741). The GBM on-ground location is consistent with the Fermi 
flight software position.

The angle from the Fermi LAT boresight is 79 degrees.

The GBM light curve consists of three main peaks with a total duration (T90)Â 
of about 109 s (50-300 keV). The time-averaged spectrum from T0+3 s to T0+112 s 
is well fit by Band function parameterized as Ep=186+/-20 keV, alpha=-0.9+/-0.1
and beta=-2.5+/-0.5.


The event fluence (10-1000 keV) in this time interval is
(1.5+/-0.1)E-05 erg/cm^2. The 1.024-sec peak photon flux measured
starting from T0+111 s in the 10-1000 keV band is  6.9+/-0.3 ph/s/cm^2.


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