TITLE: GCN CIRCULAR NUMBER: 39161 SUBJECT: GRB 250205A: Swift/XRT detection DATE: 25/02/06 00:52:30 GMT FROM: Jamie Kennea at Penn State jak51@psu.edu

J. A. Kennea (PSU), B. Sbarufatti (INAF-OAB) and P. A. Evans (Leicester) report on behalf of the Swift/XRT team:

At 22:38:21UT Swift began a target of opportunity observation of GRB 250205A (GCN #39154), approximately 74 minutes after the trigger. We detect a bright previously uncatalogued X-ray source at the following coordinates: RA/Dec(J2000) = 113.51144, 32.37196, which is equivalent to:

RA (J2000): 07h 34m 02.75s, Dec (J2000): +32d 22' 19.1",

with an estimated error of 3.8 arc-seconds radius (90% confidence). This position lies 69 arc-seconds from the SVOM/MXT position reported in GCN #39154, and 1.7 arc-seconds from the SVOM.VT optical counterpart (GCN #39159). The mean flux during the 1.4 ks XRT observation was 4.9 (±0.4) x 10^-12 erg cm^-2 s^-1 (0.3-10 keV).

Further observations of GRB 250205A with Swift are planned.

View this GCN Circular online at https://gcn.nasa.gov/circulars/39161. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...