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GCN Circular 33107

GRB 221226B: Fermi GBM Final Real-time Localization
2022-12-26T22:51:47Z (a year ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 22:41:20 UT on 26 Dec 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221226B (trigger 693787285.418586 / 221226945).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 16.3, Dec = -53.0 (J2000 degrees, equivalent to J2000 01h 05m, -53d 00'), with a statistical uncertainty of 9.8 degrees.

The angle from the Fermi LAT boresight is 46.0 degrees.

The skymap can be found here:

The HEALPix FITS file, including the estimated localization systematic, can be found here:

The GBM light curve can be found here:
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