GCN Circular 19529
Subject
GRB 160611A: Swift-BAT refined analysis
Date
2016-06-12T18:47:00Z (8 years ago)
From
Hans Krimm at NASA-GSFC <hans.a.krimm@nasa.gov>
T. Sakamoto (AGU), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC),
D. Malesani (DARK/NBI), C. B. Markwardt (GSFC), D. M. Palmer (LANL),
T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL)
(i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 160611A (trigger #690598)
(Malesani, et al., GCN Circ. 19522). The BAT ground-calculated position is
RA, Dec = 164.417, -70.396 deg which is
RA(J2000) = 10h 57m 40.0s
Dec(J2000) = -70d 23' 45.8"
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 45%.
The mask-weighted light curve shows a single episode with several overlapping
pulses. The emission starts at T-15 sec, peaks at T+3 sec and ends at T+20 sec.
T90 (15-350 keV) is 34.1 +- 5.6 sec (estimated error including systematics).
A pre-planned spacecraft slew moved the source out of the field of view at
about T+165 sec.
The time-averaged spectrum from T-31.38 to T+10.37 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.67 +- 0.12. The fluence in the 15-150 keV band is 1.7 +- 0.1 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+2.84 sec in the 15-150 keV band
is 2.0 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence
level.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/690598/BA/