TITLE: GCN CIRCULAR NUMBER: 22776 SUBJECT: GRB 180613A, Swift-BAT refined analysis DATE: 18/06/14 03:12:15 GMT FROM: Amy Lien at GSFC C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), 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+625 sec from the recent telemetry downlink, we report further analysis of BAT GRB 180613A (trigger #840853) (Tohuvavohu et al., GCN Circ. 22769). The BAT ground-calculated position is RA, Dec = 211.545, -43.082 deg which is RA(J2000) = 14h 06m 10.9s Dec(J2000) = -43d 04' 56.5" with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%. The mask-weighted light curve shows some weak emission that starts at ~T+25 s and ends at ~T+80 s. T90 (15-350 keV) is 50.8 +- 8.4 sec (estimated error including systematics). Because this trigger occurred when BAT was in the process of resuming to normal operation from the recent reboot. The entire detector array had the lower level discriminators set to a value higher than the level of normal operations. Therefore, the standard spectral analyses are unavailable. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/840853/BA/