Fermi-GBM detected a GRB-like signal on 2023-12-22 07:26:02 but did not yet confirm the detection. The lightcurve looks genuine though…
Event: Astro-COLIBRI
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The event has still not been confirmed (and given an official name). But it has been detected by the second instrument onboard the Fermi satellite, the Large Area Telescope (LAT), which is sensitive to GeV energies…
The GRB is now confirmed and given the name GRB 231222B: GCN - Circulars - 35416: GRB 231222B: Fermi-LAT detection
The entry in Astro-COLIBRI provides all necessary information.