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GCN Circular 31854

GRB 220408B: Fermi GBM Final Localization
2022-04-08T13:59:04Z (2 years ago)
Elisabetta Bissaldi at INFN,Bari <>
The Fermi GBM team reports the detection of a likely LONG GRB.

At 07:28:04.65 UT on 8 Apr 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220408B (trigger 671095689.64512 / 220408311).

The on-ground calculated location, using the Fermi GBM trigger data, is RA =  94.8, Dec = -50.9 (J2000 degrees, equivalent to J2000 06h 19m, -50d 54'), with a statistical uncertainty of 2.2 degrees.

The angle from the Fermi LAT boresight is 30.3 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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