TITLE: GCN CIRCULAR NUMBER: 36639 SUBJECT: Swift Trigger 1235109: consistent with noise and not astrophysical DATE: 24/06/07 14:20:04 GMT FROM: Amy <yarleen@gmail.com> A. D'Ai (INAF-IASFPA), A. Y. Lien (U. Tampa), K. L. Page (U Leicester) report on behalf of the Neil Gehrels Swift Observatory Team: Using the full data set from recent downlinks, we report further ground data analysis for Swift trigger 1235109 (initially called GRB 240606A; D'Ai et al. GCN Circ. 36626). The BAT analysis uses data from T-239 s to T+963 s. The image significance decreases to 2.3 sigma, and the BAT mask-weighted light does not show anything significant. No X-ray sources have been detected consistent with being within 296 arcsec of the Swift position. The 3-sigma upper limit in the field ranges from ~0.006 to ~0.007 ct s^-1, corresponding to a 0.3-10 keV observed flux of 2.5e-13 to 2.8e-13 erg cm^-2 s^-1 (assuming a typical GRB spectrum). We thus conclude that this trigger was consistent with noise fluctuations. View this GCN Circular online at https://gcn.nasa.gov/circulars/36639. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...