Correction of stellar and telluric signals. Top panel: raw data of two orders of MAROON-X red detector between 845 and 867 nm. Three strong stellar lines corresponding to the Ca+ triplet are observed around 849, 854, and 866 nm. Bottom panel: residuals obtained after correction with out-of-transit data. The dark signal here is the planetary Ca+ absorption lines, while the yellow signal is the Doppler shadow discussed in Sect. 3.4 that is caused by the Rossiter-McLaughlin effect.