Thermal temperature of the ionized absorber as a function of the velocity v_D associated with O VIII (red curve) and Ne X (blue curve). The green horizontal line indicates the thermal temperature of 7.1 keV, the solid and dashed blue vertical lines indicate the measured velocity and the corresponding uncertainties at 68% c.l. associated with the Ne X absorption line. The red vertical lines describe the upper limit on the velocity associated with the O VIII ions at 68%, 90%, and 99% c.l., respectively. The orange vertical line indicates the velocity v_D associated with the O VIII ions at the outer radius of the accretion disc.