TITLE: GCN CIRCULAR NUMBER: 28282 SUBJECT: Swift Trigger 992444 is due to detector noise DATE: 20/08/21 23:14:05 GMT FROM: Amy Lien at GSFC S. Dichiara (NASA/GSFC/UMCP), A. Y. Lien (GSFC/UMBC), and K. L. Page (U Leicester) report on behalf of the Swift team: Using the full data set from recent downlinks, we report further ground data analysis for Swift trigger 992444 (Dichiara et al. GCN Circ. 28278). The BAT analysis uses data from T-61 to T+242 sec. The BAT image significance has now decreased to 4.5 sigma (15-350 keV). Also, the mask-weighted light curve does not show anything significant. Ground analysis of 1.8 ks of PC mode data confirms no XRT counterpart within the BAT error circle, to a 3 sigma upper limit of 8e-3 count s^-1. We thus conclude that this trigger was due to detector noise.