Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 34842

GRB 231019A: Fermi GBM Final Real-time Localization
2023-10-19T17:20:27Z (7 months ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 17:09:58 UT on 19 Oct 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231019A (trigger 719428203.333452 / 231019715).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 343.1, Dec = 45.7 (J2000 degrees, equivalent to J2000 22h 52m, 45d 42'), with a statistical uncertainty of 7.2 degrees.

The angle from the Fermi LAT boresight is 92.0 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:

Looking for U.S. government information and services? Visit