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GCN Circular 29232

GRB 210104A: Fermi GBM Final Real-time Localization
2021-01-04T11:37:17Z (3 years ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 11:26:59 UT on 4 Jan 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210104A (trigger 631452424.865632 / 210104477).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 107.9, Dec = 67.1 (J2000 degrees, equivalent to J2000 07h 11m, 67d 05'), with a statistical uncertainty of 2.9 degrees.

The angle from the Fermi LAT boresight is 135.0 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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