GCN Circular 14867
Subject
GRB 130609B, Further Swift-BAT refined analysis
Event
Date
2013-06-11T13:22:03Z (13 years ago)
From
Hans Krimm at NASA-GSFC <hans.a.krimm@nasa.gov>
H. A. Krimm (GSFC/USRA) and J. R. Cummings (GSFC/UMBC)
for the Swift-BAT team:
Using the full data set from T-239 to T+963 sec from the recent telemetry
downlink, we report final analysis of BAT GRB 130609B (trigger #557828)
(Krimm, et al., GCN Circ. 14841; Lien at al., GCN Circ. 14862).
In addition to the peaks described in Lien at al., GCN Circ. 14862, we report
that there is a small peak in the BAT at around T+270 sec, coincident with a
second flare in the XRT. T90 (15-350 keV) is 210.6 +- 15.1 sec (estimated
error including systematics).
The time-averaged spectrum from T-7.8 to T+307.6 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.32 +- 0.04. The fluence and peak photon flux are as reported in GCN Circ.
14862. The quoted error is at the 90% confidence level.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/557828/BA/