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GCN Circular 33804

GRB 230516A: Fermi GBM Final Real-time Localization
2023-05-16T18:01:20Z (23 days ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB At 17:49:54 UT on 16 May 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230516A (trigger 705952199.76164 / 230516743). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 148.5, Dec = 29.6 (J2000 degrees, equivalent to J2000 09h 54m, 29d 36'), with a statistical uncertainty of 8.3 degrees. The angle from the Fermi LAT boresight is 59.0 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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