TITLE: GCN CIRCULAR NUMBER: 14819 SUBJECT: GRB 130606A, Swift-BAT refined analysis DATE: 13/06/07 23:39:13 GMT FROM: Tilan Ukwatta at MSU S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 130606A (trigger #557589) (Ukwatta, et al., GCN Circ. 14781). The BAT ground-calculated position is RA, Dec = 249.390, 29.796 deg which is RA(J2000) = 16h 37m 33.6s Dec(J2000) = +29d 47' 44.5" with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%. The mask-weighted light curve shows multiple peaks. The first peak starts around T-5 secs and last for 15 seconds, a cluster of weak peaks can be seen from T+80 sec to T+110 sec, bright two peak structure is seen from T+150 sec to T+ 170 sec, finally very weak extended multi-peak structure is observed beyond T+200 sec up to T+500 sec. T90 (15-350 keV) is 276.58 +- 19.31 sec (estimated error including systematics). The time-averaged spectrum from T-1.34 to T+297 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.52 +- 0.12. The fluence in the 15-150 keV band is 2.9 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+160.36 sec in the 15-150 keV band is 2.6 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/557589/BA/