Same as Fig. 3 with two-component fits to the line absorption profiles. The positions of the two components are shown by two small vertical tick marks. The absorption profiles of each of the two components are shown by green lines. The redward component (1) is at the same radial velocity as the absorption from all excited levels. The blueward component (2) has a higher column density, but is detected only in the Fe I lines from the ground base level.