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GCN Circular 31763

GRB 220317A: Fermi GBM Final Real-time Localization
2022-03-17T12:58:50Z (2 years ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 12:48:30 UT on 17 Mar 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220317A (trigger 669214115.664266 / 220317534).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 172.0, Dec = -11.3 (J2000 degrees, equivalent to J2000 11h 28m, -11d 18'), with a statistical uncertainty of 13.3 degrees.

The angle from the Fermi LAT boresight is 48.0 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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