Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 18020

GRB 150711A: Swift-BAT refined analysis
2015-07-12T14:56:26Z (9 years ago)
Jay R. Cummings at NASA/GSFC/Swift <>
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC),  J. R. Cummings (CPI),
N. Gehrels (GSFC), A. Y. Lien (GSFC/UMBC), 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+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 150711A (trigger #648601)
(Bernardini, et al., GCN Circ. 18011).  The BAT ground-calculated position is
RA, Dec = 221.624, -35.464 deg which is
    RA(J2000)  =  14h 46m 29.7s
    Dec(J2000) = -35d 27' 49.9"
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 32%.
The mask-weighted light curve shows a cusp-shaped main peak with smaller
preceding and following peaks, each about 20 seconds long.  Emission was
detectable from T-40 to T+70.  T90 (15-350 keV) is 64.2 +- 14.2 sec (estimated
error including systematics).
The time-averaged spectrum from T-34.1 to T+70.2 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.79 +- 0.08.  The fluence in the 15-150 keV band is 4.3 +- 0.2 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+1.98 sec in the 15-150 keV band
is 3.8 +- 0.4 ph/cm2/sec.  All the quoted errors are at the 90% confidence
The results of the batgrbproduct analysis are available at
Looking for U.S. government information and services? Visit