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GCN Circular 34656

GRB 230911D: Fermi GBM Final Localization
2023-09-11T09:35:37Z (10 months ago)
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The Fermi GBM team reports the detection of a likely long GRB.
At 07:53:09.73 UT on 11 September 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230911D (trigger 716111594 / 230911329).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 154.9, Dec = -20.9 (J2000 degrees, equivalent to J2000 +10h 19m, -20d 55'), with a statistical uncertainty of 1.0 degree.
The angle from the Fermi LAT boresight is 67 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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