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Fig. 4
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CH4-integrated LEISA band depth maps from Schmitt et al. (2017) and Gabasova et al. (2021), overlaid with the LORRI albedo map (Hofgartner et al. 2023). The white patches in the Cthulhu region, which are not colored, are considered to be CH4 frost (see the main text for an explanation).
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