GCN Circular 43439

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.