GCN Circular 23443
Subject
GRB 181123B: Swift-BAT lag analysis and search for extended emission
Event
Date
2018-11-24T03:11:55Z (7 years ago)
From
Amy Lien at GSFC <amy.y.lien@nasa.gov>
J. P. Norris (BSU), S. D. Barthelmy (GSFC), A. Y. Lien (GSFC/UMBC)
report:
We report the spectral lag analysis and the search for extended emission
for GRB 181123B (Lien et al., GCN Circ. 23432).
Using the 8-ms binned light curve, the spectral lag of the short pulse
is 6 (+11, -11) ms for the 100-350 keV to 25-50 keV bands, and 10 (+14, -11) ms
for the 50-100 keV to 15-25 keV bands. These lag values are consistent with
a short GRB.
The Bayesian block analysis using the mask-tagged light curves suggests that
there may be a marginal (~ 3 sigma) extended emission that lasts until ~T+60 s.