Six known burst groups account for all six pairs within 3 degrees and 0.1 day in the tested Fermi GBM catalog

We search a public Fermi GBM trigger catalog for bursts close in time and sky position. We select 4,418 gamma-ray burst triggers from a snapshot with 13,090 rows. Six pairs fall within 3 degrees and 0.1 day. Each pair has exactly matching catalog coordinates from a known burst group. A 90-day shuffle test gives a mean of 0.212 such pairs. We retain the first trigger in each exact coordinate group within one day. This removes seven triggers in six groups and leaves no pair in that test cell. Across nine time and angle cuts, the smallest corrected upper-tail probability for this reduced sample is 1.000. Tests with GBM positions alone and other shuffle widths are included. Known magnetar bursts give a positive control. This is a catalog audit and a null search for a new source. Assigned coordinates, broad GBM errors, exposure changes, and the use of only triggered events limit the result. No new burst source, physical process, or planet is confirmed.

astronomy · Fermi GBM · repeated triggers · gamma-ray bursts · catalog audit · null search · localization