TITLE:   GCN CIRCULAR
NUMBER:  13015
SUBJECT: GRB 120305A: Swift spectral lag analysis
DATE:    12/03/07 13:15:04 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>

J. Norris (BSU), S.D. Barthelmy (GSFC) for the BAT Team:

We report the spectral lag analysis for GRB 120305A (GCN Circ. 13004)
based on the BAT data.  Using 1-ms binned light curves, the spectral lag
for the 15-25 keV to 50-100 keV bands is 2.0 +0.6/-0.9 msec, and
-2.6 +0.6/-0.4 msec for the 25-50 keV to 100-350 keV bands
for both peaks combined.  These lag values place this burst
in the short burst category.