Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 32826

GRB 221023A: Fermi GBM Final Localization
2022-10-24T13:22:51Z (2 years ago)
Rachel Dunwoody at UCD <>
The Fermi GBM team reports the detection of a likely long GRB

At 20:41:34.92 UT on 23 October 2022, the Fermi Gamma-ray Burst Monitor
(GBM) triggered and located GRB 221023A (trigger 688250499 / 221023862).

The on-ground calculated location, using the Fermi GBM trigger data, is RA
= 232.3, Dec = 11.8 (J2000 degrees, equivalent to J2000 15h 29m, 11d 48'),
with a statistical uncertainty of 1 degree.

The angle from the Fermi LAT boresight is 52 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