Original line profiles (colored) for the non-dip (top, orange), weak dip (second from top, red), dip (third from top, purple), and strong dip (bottom, blue) lines for selected ions, as well as the same data flipped (black, see also text for further information) at the energy corresponding to adding a constant Doppler shift for each observation (vertical dashed line) to the line’s laboratory energy. For an ideal, symmetric line, the colored and black curves should match. Most of the lines observed have complex line profiles.