H.E.S.S. excess image of the HESS J1018–589 region smoothed with a Gaussian of width σ = 0.07° (on the left, a) and σ = 0.11° (on the right, b). Significance contours, calculated using an oversampling radius of 0.1° (in green) and 0.22° (in white) are shown, starting at 4σ in steps of 1σ. The black crosses (A and B) mark the best-fit position and statistical errors at 1σ level for the two emission regions (see text for details). The position of 1FGL J1018.6–5856 is shown with a blue dashed ellipse (95% confidence level) while the position of PSR J1016–5857 is marked with a yellow star. The white circles illustrate the size of the (68% containment radius) PSF smoothed with the two different Gaussian widths used.