Chandra X-ray image of the S1 region and radio contours. Left: exposure-corrected Chandra image in the 0.5–5 keV band after masking point sources, smoothed by a Gaussian of σ = 3.9 arcsec. The contours show the EMU data at levels of 10⁻⁴, 10⁻³, 0.01, 0.05 and 0.1 Jy beam⁻¹. Centre: fractional difference between an exposure-corrected image smoothed by a Gaussian with σ = 7.9 arcsec and a smooth model which is its average at each radius (measured from the radio nucleus). Right: edge-filtered X-ray image showing the gradient magnitude on scales of 16 arcsec, meaning that components on scales larger than 16 arcsec have been filtered out.