Gaussian line scan performed on the four analysed datasets. We show the results for velocity widths of 2500 km/s (solid grey line) and 100 km/s (dotted blue line). The 3σ threshold (red line) is shown. In the right panel, a zoom in the 0.5 − 0.6 keV energy range is shown to better visualise the O VII line triplet, with the red lines showing the positions of the rest-frame energies.