[vsnet-grb-info 17378] GRB 151229A Swift-BAT Spectral lag analysis
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Dec 30 08:14:35 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 18760
SUBJECT: GRB 151229A Swift-BAT Spectral lag analysis
DATE: 15/12/29 23:11:56 GMT
FROM: Scott Barthelmy at NASA/GSFC <scott at lheamail.gsfc.nasa.gov>
J. Norris (BSU), S. D. Barthelmy (GSFC), A. Y. Lien (GSFC/UMBC) for the Swift-BAT Team:
We report the spectral lag analysis for GRB 151229A (Kocevski, et al.,
GCN Circ. 18745, & Lien 18751) based on the BAT data. Using 8-ms binned light curve,
the spectral lag for the 25-50 keV to 100-300 keV bands is -47.6 +/-31 ms and
+12 +/-24 for the 15-25 to 50-100 bands. Although the errors are large,
the values are marginally consistent with zero, therefore we believe
this burst belongs to a short burst category, although we can not rule out
the long burst possibility. There is no evidence for extended emission.
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