Inferred gas temperature (left) and emitting radii (middle) for the different wavelength regions, and the emitting temperature as a function of the emitting radius (right). We show the results for the slab model fits without (squares) and with (circles) line overlap. The colours indicate the varying gas temperatures, whereas the horizontal bars denote the wavelength ranges of the regions. Errorbars are shown for the derived quantities, where those for the models without line overlap are shown in black and those for the models with line overlap are shown in red. In addition, we show for comparison the results (blacks stars) of the three component fit (approach 3, see Sect. 3.3.3) in the right panel.