GCN Circular 41137
Subject
Swift-BAT trigger 1334535 is not a GRB
Date
2025-07-22T14:22:25Z (6 days ago)
Edited On
2025-07-22T16:08:02Z (6 days ago)
From
Mike Moss at NASA GSFC <mikejmoss3@gmail.com>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Mike Moss at NASA GSFC <mikejmoss3@gmail.com>
Via
Web form
M. Moss (GSFC) on behalf of the Swift-BAT team:
The Swift-BAT trigger (trigger=1334535) at 00:14:02 UT on 18 July 2025 is not a GRB. All photons in the peak are simultaneous within the 100 us timing of the detector plane. This is indicative of a cosmic ray shower.