Effects of star spots on S_λ for the case of a temperate planet orbiting an M8V star 12 pc from Earth, with 5% area coverage of an unocculted star spot having ΔT = −800 K. The upper panel shows the median-subtracted unspotted case and the effect of spots is shown in the lower panel, where the Y-axis is the median-subtracted S_λ as per Equation (4). The effect on the CC function will be smaller than this effect on S_λ because the star-spot spectrum is not highly correlated with the molecular templates.