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GCN Circular 33357

GRB 230220B: Fermi GBM Final Real-time Localization
2023-02-20T21:35:14Z (a year ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 21:25:05 UT on 20 Feb 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230220B (trigger 698621110.792684 / 230220892).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 45.2, Dec = 28.0 (J2000 degrees, equivalent to J2000 03h 00m, 28d 00'), with a statistical uncertainty of 7.0 degrees.

The angle from the Fermi LAT boresight is 70.0 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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