Fake planet recovery by both stellar halo subtraction methods (SGF on the left and LPM on the right) after injection in YSES1 b observation cubes. The cyan spaxel is the one of the simulated planet injected in the cubes. The green spaxel is the mean of its estimations by stellar halo subtraction along the 9 cubes. The light green area covers this mean more or less the standard deviation computed along the 9 cubes at each wavelength. The fake planets were injected at separations of 0.44” (first line), 0.85” (second line), 1.69” (third line), and 2.10” (fourth line). The horizontal dots delimit the 100%, 50%, 10% and 0% of the height of the simulated line (normalized to 100). The vertical dots delimit the line wavelengths from the continuum wavelengths used for MSE calculations.