TITLE: GCN CIRCULAR NUMBER: 24880 SUBJECT: Swift Trigger 911102 is likely not an astrophysical event DATE: 19/06/25 17:08:38 GMT FROM: Amy Lien at GSFC S. B. Cenko (GSFC), A. Y. Lien (GSFC/UMBC), and A. Melandri (INAF-OAB) report on behalf of the Swift team: Using the full data set from recent downlinks, we report further ground data analysis for Swift trigger 911102 (Cenko et al. GCN Circ. 24876). The BAT analysis uses data from T-239 to T+963 sec. The BAT image significance has now decreased to 5.0 sigma (15-350 keV). Also, the mask-weighted light curve does not show anything significant. The XRT began observing the fields at T+52 minutes due to an observing constraint. No source was detected in 1.85 ks of promptly downlinked data within the BAT error circle. We thus conclude that this trigger was likely a noise fluctuation.