[vsnet-grb-info 13812] GRB 130822A Swift-BAT Spectral lag analysis

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15126
SUBJECT: GRB 130822A Swift-BAT Spectral lag analysis
DATE:    13/08/27 01:32:20 GMT
FROM:    Takanori Sakamoto at AGU  <tsakamoto at phys.aoyama.ac.jp>

J. Norris (BSU), S. D. Barthelmy (GSFC), T. Sakamoto (AGU), N. Gehrels (GSFC)

We report the spectral lag analysis for GRB 130822A (Kocevski, et al., GCN Circ. 15112) 
based on the BAT data.  Using 1-ms binned light curve, the spectral lag for the 15-25 keV 
to 50-100 keV bands is 2.6 (+3.5/-3.2) ms.  Since the lag value is consistent with zero, we 
believe this burst belongs to a short burst category.  There is no evidence for extended 
emission.