GCN Circular 3099
Subject
GRB050315: Swift-BAT Refined analysis
Date
2005-03-16T05:10:29Z (19 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
T. Sakamoto (GSFC/NRC), S. Barthelmy, L. Barbier (GSFC),
J. Cummings (GSFC/NRC), E. Fenimore (LANL), R. Fink,
N. Gehrels (GSFC), S. Holland (GSFC/USRA),
D. Hullinger (GSFC/UMD), K. Hurley (UCB), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),
S. Piranomonte (ASDC), G. Sato (ISAS), A. Smale (NASA HQ),
M. Suzuki (Saitama), J. Tueller (GSFC)
on behalf of the Swift-BAT team:
Analysis of the available data for the Swift-BAT GRB050315
(Parsons et al., GCN Circ 3094) yields a fluence of > 2.8x10^-6
erg/cm2 in the 15-350 keV band and a peak flux of 2.5 ph/cm2/sec
(also 15-350 keV). The photon index of the 1-s peak spectrum (T0+25 sec.)
is 2.5 +- 0.3 (90% confidence). Although there is a data gap,
the time averaged spectrum also shows a soft spectrum.
This appears to be a soft X-ray-rich GRB.
We are planning a further circular when more complete data
are avaliable.