Top: Simulation in channel 1A for a star (T = 6000 K) and a planet (T = 1000 K) separated by 1.8′′. From left to right: direct image resulting from four dithered positions, the star being offset in the bottom left corner (sum over the wavelengths of the channel); high frequencies residuals after subtracting the spectral Gaussian filter in each spaxel; correlation map with the very same template spectra as injected into the simulation for δV = 0. The red cross indicates the position of the planet, and the pink cross is the arbitrary position chosen away from the planet. Bottom: illustration of the molecular mapping technique in two spaxels, one at the position of the planet (red) and the other one at a position away from the planet (pink), for channel 1A (4.885–5.751 µm). From left to right: we display the filtering process applied to the model, the combined spectra and the Gaussian filter (black) in the two spaxels (pink and red), the high-frequency component after subtraction, and the cross-correlation function for δV= [−2000; +2000] km s⁻¹.