Cross-correlation maps in S/N units for potential atmospheric signals as a function of v_rest and K_p for the primary expected absorbing species in the atmosphere of GJ 1214 b. We explored water vapour (left), methane (middle), and carbon dioxide (right). Horizontal and vertical red lines indicate the expected K_p and v_rest. These example maps were derived using a 10× solar metallicity template with a cloud deck at 10 mbar. No molecular signals were detected in our cross-correlation analyses.