[vsnet-grb-info 13413] GRB 130603B: Swift-BAT Spectral lag analysis

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14746
SUBJECT: GRB 130603B: Swift-BAT Spectral lag analysis
DATE:    13/06/04 02:39:24 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <scott at lheamail.gsfc.nasa.gov>

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

We report the spectral lag analysis for GRB 130603B (GCN Circ. 14735 & 14740)
based on the BAT data.  Using 2-ms binned light curves, the spectral lag
for the 15-25 keV to 50-100 keV bands is 0.6 +-0.7 ms, and -2.5 +-0.7 mc
for the 25-50 keV to 100-350 keV bands for both peaks combined.
These lag values and the hard spectrum (GCN Circ. 14741) place
this burst in the short burst category.  There is no evidence
for extended emission at the 0.005 cnts/det/sec level.