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GCN Circular 33987

GRB 230617A: Fermi GBM Final Real-time Localization
2023-06-17T22:23:59Z (10 months ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely SHORT GRB

At 22:13:31 UT on 17 Jun 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230617A (trigger 708732816.996698 / 230617926).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 139.4, Dec = -70.5 (J2000 degrees, equivalent to J2000 09h 17m, -70d 30'), with a statistical uncertainty of 25.5 degrees.

The angle from the Fermi LAT boresight is 90.0 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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