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GCN Circular 33716

GRB 230430B: Fermi GBM Final Localization
2023-05-02T07:06:30Z (a year ago)
Joe Mangan at IJCLab <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 08:50:32 UT on 30 Apr 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230430B (trigger 704537437 / 230430368).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 113.9 Dec = -31.2 (J2000 degrees, equivalent to J2000 7h 36m, -31d 12'), with a statistical uncertainty of 3.02 degrees.

The angle from the Fermi LAT boresight is 27 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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