Fig. 2
a) Ti II 3242 and 3384 Å lines in our averaged spectrum; b) the difference spectrum of the two Ti II lines in a). For a direct comparison, the two Ti II lines in panel a) are shifted to the radial velocity frame, and the central absorption depth of the 3384 Å line is normalized to that of the 3242 Å line. The two absorption features of SH we identified are marked by vertical dashed lines.
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