TITLE: GCN CIRCULAR NUMBER: 13585 SUBJECT: GRB 120804A: Swift-BAT Spectral lag analysis DATE: 12/08/05 03:36:54 GMT FROM: Scott Barthelmy at NASA/GSFC J. Norris (BSU), N. Gehrels (GSFC), S. D. Barthelmy (GSFC) We report the spectral lag analysis for GRB 120804A (GCN Circ. 13573 & 13581) based on the BAT data. Using 8-ms binned light curves, the spectral lag for the 15-25 keV to 50-100 keV bands is 16 +-12 msec, and -5 +-6 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.