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

GCN Circular 31427

Confirmation of the X-ray afterglow of GRB 220107B
2022-01-10T14:39:41Z (2 years ago)
Kim Page at U.of Leicester <>
K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team:

Swift-XRT has performed a second follow-up observation of the
Fermi/LAT-detected GRB 220107B (Arimoto et al., GCN 31409), ~184 ks after
the trigger. The source suggested to be the X-ray counterpart in GCN 31411
(Gropp et al.) has clearly faded, with a power-law slope of alpha = 1.54
(+0.32, -0.24), and is therefore confirmed as the X-ray afterglow.

This circular is an official product of the Swift-XRT team.
Looking for U.S. government information and services? Visit