TITLE:   GCN CIRCULAR
NUMBER:  42493
SUBJECT: GRB 251025B: Swift-XRT confirmation of fading
DATE:    25/10/27 20:42:45 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 reobserved the X-ray afterglow of GRB 251025B (Hussein et al.,
GCN Circ. 42437, Beardmore et al., GCN Circ. 42245), gathering a further
2.6 ks of exposure from T0+131 ks to T0+154 ks. 

The X-ray source is detected but has faded significantly, from 0.30 +/- 0.02 ct/sec 
to 0.009 (+0.003, -0.002) ct/sec (0.3-10 keV), further confirming its identity as the
afterglow of this GRB. The best-fitting power-law decay index is 0.95 (+0.15, -0.12).

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