TITLE: GCN CIRCULAR NUMBER: 39971 SUBJECT: GRB 250329B: Swift-XRT confirmation of fading DATE: 25/03/31 12:43:42 GMT FROM: P.A. Evans at U. Leicester pae9@leicester.ac.uk

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.

View this GCN Circular online at https://gcn.nasa.gov/circulars/39971. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...