TITLE: GCN CIRCULAR NUMBER: 25003 SUBJECT: GRB 190706B: Swift-BAT refined analysis DATE: 19/07/07 02:03:38 GMT FROM: Amy Lien at GSFC C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), A. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), A. Tohuvavohu (PSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 190706B (trigger #913302) (Tohuvavohu et al., GCN Circ. 24993). The BAT ground-calculated position is RA, Dec = 107.443, -29.575 deg which is RA(J2000) = 07h 09m 46.4s Dec(J2000) = -29d 34' 30.7" with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 69%. The mask-weighted light curve shows a multi-peaked structure that starts at ~T0 and ends at ~T+30 s. The highest peak occurs at ~T+1 s. T90 (15-350 keV) is 25.16 +- 6.35 sec (estimated error including systematics). The time-averaged spectrum from T-0.25 to T+27.48 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.90 +- 0.23. The fluence in the 15-150 keV band is 5.8 +- 0.9 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.10 sec in the 15-150 keV band is 1.4 +- 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/913302/BA/