TITLE: GCN CIRCULAR NUMBER: 26313 SUBJECT: LIGO/Virgo S191129u: Swift/BAT in SAA DATE: 19/11/29 18:43:01 GMT FROM: Amy Lien at GSFC A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), A. P. Beardmore (U. Leicester), M. G. Bernardini (INAF-OAB), A. A. Breeveld (MSSL-UCL), D. N. Burrows (PSU), S. Campana (INAF-OAB), S. B. Cenko (NASA/GSFC), G. Cusumano (INAF-IASF PA), A. D'Ai (INAF-IASFPA), P. D'Avanzo (INAF-OAB), V. D'Elia (ASI-ASDC), S. Emery (UCL-MSSL), P. A. Evans (U. Leicester), P. Giommi (ASI), C. Gronwall (PSU), D. Hartmann (Clemson U.), J. A. Kennea (PSU), N. Klingler (PSU), H. A. Krimm (NSF), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), A. Melandri (INAF-OAB), J. A. Nousek (PSU), S. R. Oates (Uni. of Warwick), P. T. O'Brien (U. Leicester), J. P. Osborne (U. Leicester), C. Pagani (U. Leicester), K. L. Page (U.Leicester), M. J. Page (UCL-MSSL), M. Perri (ASDC), J. L. Racusin (NASA/GSFC), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU), G. Tagliaferri (INAF-OAB), A. Tohuvavohu (Toronto), E. Troja (NASA/GSFC/UMCP) report on behalf of the Swift team: We report the search results in the BAT data within T0 +/- 100 s of the LVC event S191129u (LIGO/VIRGO Collaboration GCN Circ. 26303), where T0 is the LVC trigger time (2019-11-29T13:40:29.197 UTC). The center of the BAT field of view (FOV) at T0 is RA = 270.454 deg, DEC = 18.713 deg, and the roll angle is 210.645 deg. The BAT FOV (>10% partial coding) covers 10.00% of the integrated LVC localization probability, and 10.12% of the galaxy convolved probability (Evans et al. 2016). BAT was in SAA from T0-786 s to T0+352 s. Therefore, BAT data analyses are unavailable around T0. The results of the BAT analysis are available at https://swift.gsfc.nasa.gov/results/BATbursts/team_web/S191129u/web/source_public.html