GCN Circular 6025
Subject
RHESSI Spectrum of GRB070125
Date
2007-01-26T00:47:31Z (18 years ago)
From
Eric Bellm at UCB/SSL <ebellm@ssl.berkeley.edu>
E. Bellm, M. Bandstra, S. Boggs, C. Wigger, W. Hajdas,
D. M. Smith, and K. Hurley on behalf of the RHESSI team report:
As observed by RHESSI, GRB070125 (Hurley et al., GCN 6024)
had a duration of ~70s starting at about T0=07:20:42 UT.
The preliminary fit to the time-integrated RHESSI spectrum from T0 -
T0+69s between 30 keV and 10 MeV is a cutoff power law with
alpha = -1.33 +0.11/-0.09
E0 = 1450. +710/-450. keV
Epeak = 980. +/-300. keV
(90% confidence levels).
The 30 keV-10 MeV fluence is 1.5 E-4 erg/cm^2.
The RHESSI data show two main periods of GRB emission. The first, from T0
- T0+13s, had a fluence of 4.6 E-5 erg/cm^2 and an Epeak of 950 +/-300
keV. A second, multi-peaked emission period occurred from T0+30s - T0+50s
and had a fluence of 7.2 E-5 erg/cm^2 and an Epeak of 675 +/-175 keV.