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Fig. 8


Fits of the Spitzer 2004 (black points at top) and Herschel 2012 (all other points) brightness temperatures of the Pluto-Charon system using a seasonal+diurnal model. The seasonal thermal inertia is 2000 MKS. Solid lines: model assuming that radiation originates at the surface at all Herschel wavelengths (case 4b in Table 2). Dashed lines: same, but using the wavelength-dependent absorption coefficient from Fig. 5 (case 6b).

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