GCN Circular 5246
Subject
GRB 060607B: Swift-BAT Refined Analysis
Date
2006-06-08T21:12:40Z (18 years ago)
From
Hans Krimm at NASA-GSFC <krimm@milkyway.gsfc.nasa.gov>
L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/ORAU),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho),
M. Koss (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU),
G. Sato (GSFC/JSPS/USRA), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC),
on behalf of the Swift-BAT team:
Using the data set from T-239.4 to T+250 sec from the recent telemetry
downlink, we report further analysis of BAT GRB 060607
(trigger #213934) (Krimm, et al., GCN 5244). The BAT
ground-calculated position
is (RA,Dec) = 42.048, 14.749 deg {2h 48m 11.6s, 14d 44' 57.1"} (J2000)
+- 1.2 arcmin, (radius, sys+stat, 90% containment). The partial
coding was 35%.
The mask-weighted light curve shows a double-peaked structure with peaks at
T+1 sec and T+9 sec. There is low-level emission out to T+30 sec.
T90 (15-350 keV) is 31 +- 5 sec (estimated error including systematics).
The time-averaged spectrum from T-0.8 to T+37.1 is best fit by
a simple power-law model. The power law index of the time-averaged
spectrum is 1.63 +- 0.12. The fluence in the 15-150 keV band is
1.7 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured
from T+8.64 sec in the 15-150 keV band is 1.5 +- 0.3 ph/cm2/sec.
All the quoted errors are at the 90% confidence level.