TITLE: GCN CIRCULAR NUMBER: 5662 SUBJECT: GRB 060929, Swift-BAT further refined analysis - late-time flare DATE: 06/09/30 02:20:04 GMT FROM: Scott Barthelmy at NASA/GSFC D. Palmer (LANL), G. Sato (GSFC/ISAS), S. D. Barthelmy (GSFC), T. Sakamoto (GSFC/ORAU), C. Markwardt (USFC/UMd), N. Gehrels (GSFC) on behalf of the Swift-BAT team: We have received additional data beyond that used for GCN Circ 5660 (Fenimore, et al) now out to T+1000 sec. We note that there is highly significant emmission in the mask-weighted light curve starting at T+400 sec and ending at T+600 sec. This emission is much softer than the initial emission at T_zero. Given the spectral signiture of the initial T_zero emission and that there are no known sources at this location (Galactic or extra-Galactic), we still strongly believe that this event is a GRB and not some other non-GRB astrophysical source. We therefore conclude that this late-time emission is a flare.