TITLE: GCN CIRCULAR NUMBER: 14867 SUBJECT: GRB 130609B, Further Swift-BAT refined analysis DATE: 13/06/11 13:22:03 GMT FROM: Hans Krimm at NASA-GSFC H. A. Krimm (GSFC/USRA) and J. R. Cummings (GSFC/UMBC) for the Swift-BAT team: Using the full data set from T-239 to T+963 sec from the recent telemetry downlink, we report final analysis of BAT GRB 130609B (trigger #557828) (Krimm, et al., GCN Circ. 14841; Lien at al., GCN Circ. 14862). In addition to the peaks described in Lien at al., GCN Circ. 14862, we report that there is a small peak in the BAT at around T+270 sec, coincident with a second flare in the XRT. T90 (15-350 keV) is 210.6 +- 15.1 sec (estimated error including systematics). The time-averaged spectrum from T-7.8 to T+307.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.32 +- 0.04. The fluence and peak photon flux are as reported in GCN Circ. 14862. The quoted error is at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/557828/BA/