TITLE: GCN CIRCULAR NUMBER: 43439 SUBJECT: GRB 260117A: Swift-XRT observations DATE: 26/01/18 04:47:03 GMT FROM: Phil Evans at U of Leicester <pae9@star.le.ac.uk> C. Salvaggio (INAF-OAB), M. Ferro (INAF-OAB), R. Brivio (INAF-OAB), D.N. Burrows (PSU), S. Lanava (PSU), S. Dichiara (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the SVOM/ECLAIRs-detected burst GRB 260117A, collecting 2.9 ks of Photon Counting (PC) mode data between T0+12.5 ks and T0+19.8 ks. Two uncatalogued X-ray sources have been detected, however none of them is above the RASS limit or shows definitive signs of fading. Therefore, at the present time we cannot identify which, if any, is the afterglow. Details of these sources are given below: Source 1: RA (J2000.0): 188.1380 = 12h 32m 33.12s Dec (J2000.0): +43.9131 = +43d 54' 47.3" Error: 5.3 arcsec (radius, 90% conf.) Count-rate: (8.6 +/- 2.1)e-3 ct s^-1 Distance: 152 arcsec from SVOM/ECLAIRs position. Flux: (3.90 +/- 0.93)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV) Source 2: RA (J2000.0): 188.3043 = 12h 33m 13.03s Dec (J2000.0): +43.8449 = +43d 50' 41.7" Error: 5.8 arcsec (radius, 90% conf.) Count-rate: (4.0 [+1.7, -1.4])e-3 ct s^-1 Distance: 343 arcsec from SVOM/ECLAIRs position. Flux: (1.29 [+0.56, -0.44])e-10 erg cm^-2 s^-1 (observed, 0.3-10 keV) 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/00021898. This circular is an official product of the Swift-XRT team. View this GCN Circular online at https://gcn.nasa.gov/circulars/43439. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...