Four randomly selected cross-correlated spectra from the final extracted spectra of companions dataset. For this particular case, the signals were inserted at RV = 0 (dashed vertical line) with a scale factor of eight, which corresponds to an average S/N of ≃0.633. This plot aims to show how the transformed spectra with H₂O signals (blue) do not show a visible cross-correlation peak, nor any obvious patterns that differ from the negative group (red); separating the groups based on a S/N statistic is non-trivial.