TITLE: GCN CIRCULAR NUMBER: 43652 SUBJECT: GRB 260208A: Swift-XRT observations DATE: 26/02/08 21:51:33 GMT FROM: Phil Evans at U of Leicester <pae9@star.le.ac.uk> S. Dichiara (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), J.A. Kennea (PSU), D.N. Burrows (PSU) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the Fermi/LAT-detected burst GRB 260208A, collecting 3.4 ks of Photon Counting (PC) mode data between T0+35.1 ks and T0+42.2 ks. Six uncatalogued X-ray sources have been detected, with Source 1 located 2.2 arcsec from the new optical source seen by MASTER and GOTO (GCN Circ. 43640 and 43641) and, therefore, consistent with that source. The details of this new X-ray source are: RA (J2000.0): 204.73150 = 13h 38m 55.56s Dec (J2000.0): +33.80112 = +33d 48' 04.0" Error: 2.5 arcsec (radius, 90% conf. [Enhanced position]) Count-rate: 0.0488 +/- 0.0045 ct s^-1 Flux: (1.55 +/- 0.14)e-12 erg cm^-2 s^-1 (observed, 0.3-10 keV) However, we cannot presently determine if the source is fading. The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/ToO_GRBs/00021908. This circular is an official product of the Swift-XRT team. View this GCN Circular online at https://gcn.nasa.gov/circulars/43652. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...