Relative line power as a function of temperature, drawn using the table by Mewe et al. 1985. The numbers near the curves denote the spectral lines according to Table 2. The black curves correspond to the super-hot spectral lines with T_peak ≥ 10⁸ K and the grey curves to the lower-temperature ones with T_peak < 10⁸ K. The weakest lines 3, 9, and 10 are also shown separately on the bottom panel.