Significance map after converting from the p-value from Welch’s t-test using the erf function for the most significant detected signal with the H-spec model spectrum of log VMR_TiO = −8. The black dashes show the most significant signal, the white dashes show the expected K_p and V_sys, and the color bar grid interval is 1σ, and the white area also represents the 1σ error of the detected signal.