TITLE:   GCN CIRCULAR
NUMBER:  37823
SUBJECT: GRB 241018A: Swift-XRT observations
DATE:    24/10/19 11:33:48 GMT
FROM:    Phil Evans at U of Leicester <pae9@star.le.ac.uk>

J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A. D'Ai
(INAF-IASFPA), A. Melandri (INAF-OAR), T. Sbarrato (INAF-OAB), D.N.
Burrows (PSU), M. A. Williams (PSU), S. Dichiara (PSU) and P.A. Evans
(U. Leicester) reports on behalf of the Swift-XRT team:

Swift-XRT has performed follow-up observations of the SVOM detected
burst GRB 241018A (GCNs 37812, 37814; Atteia et al., Maggi et al.) 
collecting 3.7 ks of Photon Counting (PC) mode data between T0+18.2 ks
and T0+71.2 ks. 

Six uncatalogued X-ray sources have been detected in the XRT
field-of-view, of which one (Source 1), is at the location of the
fading optical counterpart seen by the SVOM/VT and NOT (GCNs 37819,
37821; Qiu et al., Malesani et al.), with the following details:

Source 1:
  RA (J2000.0):  67.9965  =  04:31:59.15
  Dec (J2000.0): +43.0196  =  +43:01:10.5
  Error: 4.4 arcsec (radius, 90% conf. [Enhanced position])
  Count-rate: (8.5 [+2.6, -2.2])e-3 ct s^-1   
  Distance: 41 arcsec from SVOM/ECLAIRs position.
  Flux: (3.27 [+1.00, -0.84])e-13 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/00021724.

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