TITLE: GCN CIRCULAR NUMBER: 23724 SUBJECT: GRB 190114C: Swift-BAT refined analysis DATE: 19/01/15 19:51:20 GMT FROM: Amy Lien at GSFC H. A. Krimm (NSF/USRA), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), J. D. Gropp (PSU), 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 190114C (trigger #883832) (Gropp et al., GCN Circ. 23688). The BAT ground-calculated position is RA, Dec = 54.503, -26.938 deg which is RA(J2000) = 03h 38m 00.7s Dec(J2000) = -26d 56' 17.5" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows a multi-peaked structure that starts at ~T-7 s. The brightest emission contains two complex pulses and ends at ~T+50 s. Afterwards, the emission appeared to decay exponentially out to beyond ~T+720 s, when the burst went out of the BAT field of view. The burst did not come back into the BAT field of view until ~T+3800, and nothing significant was detected at that time. T90 (15-350 keV) estimated using data before the burst went out of the BAT field of view is 361.5 +- 11.7 sec (estimated error including systematics). Please note that this T90 might be an underestimate. The time-averaged spectrum from -6.604 to 703.192 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.43 +- 0.02. The fluence in the 15-150 keV band is 8.3 +- 0.1 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+0.23 sec in the 15-150 keV band is 101.0 +- 1.5 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/883832/BA/