Tomography positive quality checks of the detections in the planetary restframe, for the 4-UT partial transit, before applying the stellar contamination correction (this also shows the restframe of the Doppler shadow, i.e., the red track). Each square represents a 0.1 Å bin on the horizontal scale (except 0.2 Å for Li and 1 km s⁻¹ for Mg). The color scale (not shown here as these are qualitative plots) is different for each plot, from blue representing absorption to red representing emission. The vertical dotted lines represent the laboratory wavelength. The horizontal white lines represent the end of the transit. The Mg tomography (bottom right plot) is presented in the velocity space as the sum of the three lines of the triplet.