Skip to main content
New Swift-BAT/GUANO and IceCube Notice Types Available! See news and announcements

GCN Circular 33041

GRB 221211A: Fermi GBM Final Real-time Localization
2022-12-11T06:45:18Z (a year ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 06:34:53 UT on 11 Dec 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221211A (trigger 692433298.712892 / 221211274).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 160.9, Dec = 52.2 (J2000 degrees, equivalent to J2000 10h 43m, 52d 12'), with a statistical uncertainty of 4.7 degrees.

The angle from the Fermi LAT boresight is 79.0 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:
Looking for U.S. government information and services? Visit