Result of molecular mapping for a simulated observation of GJ504 b with the MRS for single sub-bands. First vertical column: single log-scaled frame from the flux calibrated and reconstructed cube, and the same frame cross-correlated with its input spectrum for sub-band 1A. Second and third vertical columns: cross correlation maps of filtered cubes with individual molecular templates correctly identify the abundant species of H2 O CH4 and NH3. No CO is detected (top right panel), as expected from chemical equilibrium models for cold objects as for instance GJ 504 b. Values in parentheses indicate the S/N and the sub-bands with the highest S/N are plotted.