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Fig. B.1.

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I′-band PSF variations in the HD 169142 observations on July 9, 2015, and impact on the Qϕ simulation. The top row shows the best cycle PSF (a) and the worst cycle PSF (b). Both are divided by the maximum of the best cycle PSF. The bottom row illustrates the Qϕ model (normalized to 1) given in Fig. 6 (c) convolved with the best PSF (d) and the worst PSF (j).

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