TITLE: GCN CIRCULAR NUMBER: 28136 SUBJECT: GRB 200716C: Swift-BAT refined analysis DATE: 20/07/17 20:26:57 GMT FROM: Tilan Ukwatta at LANL S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF),S. Laha (GSFC/UMBC), 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-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200716C (trigger #982707) (Ukwatta, et al., GCN Circ. 28124). The BAT ground-calculated position is RA, Dec = 196.011, 29.636 deg which is RA(J2000) = 13h 04m 02.5s Dec(J2000) = +29d 38' 08.4" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 57%. The mask-weighted light curve shows two prominent peaks, first at ~T+0.1 s and the second at ~T+2.1. Significant activity is still visible until ~T+90 s. T90 (15-350 keV) is 86 +- 17 sec (estimated error including systematics). The time-averaged spectrum from T-0.42 to T+112.63 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is1.65 +- 0.09. The fluence in the 15-150 keV band is 3.6 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-0.18 sec in the 15-150 keV band is 10.7 +- 0.5 ph/cm2/sec. All the quoted errors are at the 90% confidencelevel. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/982707/BA/