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Fig. 9.

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Average of the NIR veiling computed at each observational period, with the error bar as the standard deviation of the computed mean veiling. We merged the measured veiling in 2020a and 2020b of the stars V2129 Oph and GQ Lup, as they are successive observations. The mean NIR veiling seems to be stable for most of the targets for a few months or years.

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