Fig. 4
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Relative flux time evolution of stellar line cores of Na I D2 (top panel, orange) and D1 (bottom panel, orange) compared with Hα (gray) and the Ca II IRT (blue) on night 1. The vertical dashed lines mark the times of first, second, third, and fourth contact, andthe horizontal dashed line is unity. This figure can be compared with Fig. B.2.
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