Left column plots show the observed rotational splittings, normalized by their maximum value (red error bars) and the observed period spacings, normalized by the observed period spacing ΔΠ₁ (blue error bars) as functions of mode frequency for the target KIC 007619745 (top), and for the hare-and-hounds exercise. Right column plots show the observed rotational splitting δ as a function of ζ_mod (red points and error bars), δ vs. ζ_as (dark green points and error bars), and both δ vs. ΔP_ν/ ΔΠ₁ and δ_ΔP vs. ΔP/ ΔΠ₁ (blue points and cyan error bars). See Sect. 2.1.