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GCN Circular 39971

Subject
GRB 250329B: Swift-XRT confirmation of fading
Date
2025-03-31T12:43:42Z (4 days ago)
From
P.A. Evans at U. Leicester <pae9@leicester.ac.uk>
Via
Web form
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:

Swift-XRT has carried out a second observation of GRB 250329B. The X-ray source reported by Beardmore et al. (GCN Circ. 39939) has faded, with a decay index of 1.19 (+0.47, -0.28). We therefore confirm that it is the afterglow of this GRB.

This circular is an official product of the Swift-XRT team.
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