Fig. 26
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Examples of normalised spectra for which twin epochs were taken separated by more than six months. Top panel: 5797 and 5780 Å DIBs observed with X-shooter at low PWV (4U 1907+09 not shown due to low S/N). Middle panel: The same DIBs observed with X-shooter. Bottom panel: 1318.1 nm NIR DIBs. The black line is the earlier epoch and the blue line the later epoch. For HD 115363, HD 116119, HD 142468, HD 144969, and HD 183143, the transverse distances moved by the star between the two epochs are 24.0±3.4, 19.5±2.9, 7.2±0.7, 6.4±3.1, and 138±20 au, respectively. The parallax and proper motions for 4U 1907+09 are not available in SIMBAD.
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