TITLE: GCN CIRCULAR NUMBER: 19639 SUBJECT: GRB 160630A: Swift-BAT refined analysis DATE: 16/07/01 12:43:23 GMT FROM: Amy Lien at GSFC H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), 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 160630A (trigger #702252) (Krimm, et al., GCN Circ. 19624). The BAT ground-calculated position is RA, Dec = 198.238, -56.029 deg which is RA(J2000) = 13h 12m 57.0s Dec(J2000) = -56d 01' 44.3" with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 51%. The mask-weighted light curve shows a single-peaked structure that starts at ~T-1 s, peaks at ~T0, and ends at ~T+35 s. T90 (15-350 keV) is 29.50 +- 5.51 sec (estimated error including systematics). The time-averaged spectrum from T-1.00 to T+34.89 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.32 +- 0.14. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.42 sec in the 15-150 keV band is 1.2 +- 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/702252/BA/