GCN Circular 24819
Subject
GRB 190613A, Swift-BAT refined analysis
Date
2019-06-13T19:46:50Z (6 years ago)
From
Amy Lien at GSFC <amy.y.lien@nasa.gov>
M. Stamatikos (OSU), E. Ambrosi (INAF-IASFPA)
S. D. Barthelmy (GSFC), J. R. Cummings (CPI),
H. A. Krimm (NSF), A. Y. Lien (GSFC/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL),
T. Sakamoto (AGU), T. N. Ukwatta (LANL)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 190613A (trigger #908288)
(Ambrosi et al., GCN Circ. 24798). The BAT ground-calculated position is
RA, Dec = 182.552, 67.244 deg which is
RA(J2000) = 12h 10m 12.5s
Dec(J2000) = +67d 14' 39.7"
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 9%.
The mask-weighted light curve shows a weak pulse that starts at ~T0, peaks
at ~T+7 s, and ends at ~T+20 s. T90 (15-350 keV) is 17.6 +- 3.1 sec
(estimated error including systematics).
The time-averaged spectrum from T+0.6 to T+20.3 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.22 +- 0.26. The fluence in the 15-150 keV band is 1.7 +- 0.3 x 10^-6
erg/cm2.
The 1-sec peak photon flux measured from T+6.88 sec in the 15-150 keV band
is 1.5 +- 0.7 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/908288/BA/
[GCN OPS NOTE(13jun19): Per author's request, in the 3rd line
"GCN Circ. 908288" was corrected to read "GCN Circ. 24798".