Confidence contours showing deviations from the continuum model described in Sect. 4.1 in the soft (left) and hard (right) band. Black contours show Δ𝒞 = +0.5 while the colored contours show Δ𝒞 = −2.3 (cyan), −4.61 (blue), −9.21 (green), −13.82 (red), −18.42 (magenta), corresponding to a significance of 68%, 90%, 99%, 99.9%, and 99.99% for two parameters. In both panels, the main transitions from ionized Ne and Fe are labeled at their rest-frame energies.