Three examples for sightline pairs with angular separations ≤ 1°. Differences in the absorption profiles indicate small-scale structure in the absorbing gas. High-velocity absorption components are indicated with the gray bar. Blends with intergalactic absorption features are indicated with a star symbol. QSO names and angular separations between the sightlines are given on top of each panel. Appendix B contains this plot for all 12 sightline-pairs.
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