Fig. 7

image

VIRTIS-H spectra of comet 67P obtained at different phase angles (shown in logarithmic scale). Top spectrum (red): cube T1_00399392471 acquired on 28 August 2015 (rh = 1.26 AU, α = ~72°) with a mean elevation of 4.1 km. Bottom spectrum (black): cube T1_00400433767 acquired on 7 September 2015 (rh = 1.29 AU, α = ~120°) with a mean elevation of 2.2 km. The model fits to the continuum are shown in cyan, with derived parameters (Tcol (K), A, (percent per 100 nm), and Sheat) = (304, 0.14, 1.3, and 1.23) and (283, 0.09, 2.8, and 1.15) for 28 August and 7 September, respectively. The spectra fulfill the quality criterion TEST3.0 < 1.1 and do not present significant stray light.

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