TITLE: GCN CIRCULAR NUMBER: 5713 SUBJECT: GRB 061007: Swift-BAT refined analysis DATE: 06/10/07 23:25:05 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift C. Markwardt (GSFC/UMD), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho), H. Krimm (GSFC/USRA), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), P. Schady (MSSL-UCL), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC) on behalf of the Swift-BAT team: Using the data set from T-58 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 061007 (trigger #232683) (Schady, et al., GCN Circ. 5707). The BAT ground-calculated position is RA,Dec = 46.299, -50.496 deg {3h 5m 11.8s, -50d 29' 47.4"} (J2000) +- 0.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 19%. Before T-58 sec, the burst location was not in BAT's FOV, but there is no detection through the side of the instrument of any significant earlier emission. The lightcurve shows three large peaks, each with several seconds rise and fall and a roughly flat top, and each including several sub-peaks. The first lasts from T-5 to T+15, the second from T+23 to T+40, and the third from T+40 to T+65 sec. There is a smaller peak starting at T+75, rising to a flat top from T+78 to T+80 and then declining with a very long roughly exponential decay. Emission is weakly detectable until around T+900 sec. T90 (15-350 keV) is 75 +- 5 sec (estimated error including systematics). The time-averaged spectrum from T-4.1 to T+231.8 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.13 +- 0.03. The fluence in the 15-150 keV band is 4.5 +- 0.1 x 10^-05 erg/cm2. The 1-sec peak photon flux measured from T+45.14 sec in the 15-150 keV band is 15.3 +- 0.4 ph/cm2/sec. All the quoted errors are at the 90% confidence level.