GCN Circular 4748
Subject
GRB 060210: Further refined analysis of the Swift-BAT burst
Date
2006-02-12T00:57:32Z (18 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
T. Sakamoto (GSFC/ORAU), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), A. Parsons (GSFC), G. Sato (ISAS), J. Tueller (GSFC),
A. Beardmore (U Leicester)
on behalf of the Swift-BAT team:
Using the data set from T-299.8 to T+302.2 sec from the recent telemetry
downlink, we report further analysis of BAT GRB 060210
(trigger #180977) (Beardmore, et al., GCN 4724; Parsons, et al., GCN 4734).
The BAT ground-calculated position is (RA,Dec)
= 57.729, 27.024 deg {3h 50m 55.1s, 27d 1' 27.5"} (J2000)
+- 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 41%.
The mask-weighted lightcurve shows many peaks with significant emission
peaks starting at T-230 sec and the last peak at T+200. We caution that
this on-going activity is a significant fraction of the t-300 to T+300 sec
data interval we have received so far. This burst may have earlier or
later activity. The main activity is from T-75 to T+20 sec with the
brightest peak at T_zero.
T90 (15-350 keV) is (255 +- 10) sec (estimated error including systematics).
The time-averaged spectrum from T-227.5 to T+205.8 is best fit by
a simple power-law model. The power law index of the time-averaged
spectrum is 1.52 +- 0.09. The fluence in the 15-150 keV band is
(7.7 +- 0.4) x 10^-06 erg/cm2. The 1-sec peak photon flux measured
from T+0.00 sec in the 15-150 keV band is (2.8 +- 0.3) ph/cm2/sec.
All the quoted errors are at the 90% confidence level.
[GCN OPS NOTE(11feb06): Per author's request, the Beardmore author was added.]