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GCN Circular 32420

GRB 220721A: Fermi GBM Final Real-time Localization
2022-07-21T00:41:52Z (2 years ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 00:30:25 UT on 21 Jul 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220721A (trigger 680056230.386204 / 220721021).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 356.6, Dec = -39.5 (J2000 degrees, equivalent to J2000 23h 46m, -39d 30'), with a statistical uncertainty of 9.1 degrees.

The angle from the Fermi LAT boresight is 25.0 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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