Top : MUSE image integrated over the range 4750-9350 Å. The red circle corresponds to the aperture used to extract the companion’s spectrum (on-source spectrum). The orange circles, placed at equi-distance of the star and the companion, represent the apertures used to estimate the spectrum of the stellar PSF (+ background). The green circle corresponds to the apertures of the background nebula spectrum. The radius of these apertures is 0.08”. Bottom : In red, the on-source spectrum. In orange, the mean of the stellar PSF (+background) spectra. In green, the background nebula spectrum.