[vsnet-grb-info 10683] GRB 110705A: Fermi GBM detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Jul 5 20:54:37 JST 2011
TITLE: GCN CIRCULAR
NUMBER: 12108
SUBJECT: GRB 110705A: Fermi GBM detection
DATE: 11/07/05 11:54:33 GMT
FROM: Andreas von Kienlin at MPE <azk at mpe.mpg.de>
A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team:
"At 03:37:11.94 UT on 05 July 2011, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 110705A (trigger 331529833 / 110705151).
The on-ground calculated location, using the GBM trigger
data, is RA = 160.6, DEC = +24.0 (J2000 degrees,
equivalent to 10h 42m, 24d 0'), with an uncertainty
of 4.7 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 75 degrees.
This burst was also independently detected by INTEGRAL SPI-ACS.
The GBM light curve consists of one short spike
with a duration (T90) of about 0.2 s (50-300 keV).
The time-averaged spectrum from T0-0.016 s to T0+0.208 s is
best fit by a Band function with Epeak = 1010 +90/-80 keV,
alpha = -0.17 +/- 0.07, and beta = -3.0 +0.2/-0.4.
The event fluence (10-1000 keV) in this time interval is
(3.3 +/- 0.1)E-06 erg/cm^2. The 0.016-sec peak photon flux measured
starting from T0+0.0 s in the 10-1000 keV band
is 50 +/- 4 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
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