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GCN Circular 31025

GRB 211031A: Fermi GBM Final Real-time Localization
2021-10-31T04:21:52Z (2 years ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely SHORT GRB

At 04:11:39 UT on 31 Oct 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211031A (trigger 657346304.154694 / 211031175).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 72.0, Dec = -54.3 (J2000 degrees, equivalent to J2000 04h 47m, -54d 17'), with a statistical uncertainty of 10.7 degrees.

The angle from the Fermi LAT boresight is 28.0 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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