Fig. 3.
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NIR/BLU vs. phase-angle data for the Phobos ROIs and Deimos. The error bars are the 1σ standard deviations. The solid line shows the best-fit linear phase-reddening models, whose parameters are reported in Table 1. The vertical dashed lines indicate the range of the phase angles we used for the fits. The ROIs are defined in Fig. 2 and are described in Sect. 2.
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