TITLE: GCN CIRCULAR NUMBER: 25129 SUBJECT: GRB 190719C: Swift-BAT refined analysis DATE: 19/07/20 17:47:52 GMT FROM: Amy Lien at GSFC T. Sakamoto (AGU), E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (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 190719C (trigger #915381) (Ambrosi et al., GCN Circ. 25106). The BAT ground-calculated position is RA, Dec = 240.208, 13.005 deg which is RA(J2000) = 16h 00m 49.8s Dec(J2000) = +13d 00' 18.4" with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows a multi-peaked structure that starts at ~T0 and ends at ~T+200 s. The main peak occurs at ~T0. T90 (15-350 keV) is 185.7 +- 9.7 sec (estimated error including systematics). The time-averaged spectrum from T-0.09 to T+201.96 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.64 +- 0.09. The fluence in the 15-150 keV band is 5.1 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.27 sec in the 15-150 keV band is 5.5 +- 0.3 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/915381/BA/