Examples of flux (top panels) and W₈₀ (bottom panels) maps for Arp 220. From left to right, the H₂ S(5)λ6.9091 μm, [ArII]λ6.9853 μm, [FeII]λ5.3403 μm, and [ArIII]λ8.9914 μm. The central crosses identify the location of the peak of the continuum, corresponting to the western nucleus, used as reference to calculate radial distances from the galaxy nucleus. The gray regions correspond to locations where the corresponding emission line is not detected with a signal-to-noise ratio of s/n > 5 and regions not covered by the MRS FoV.