Extension of the fit of the feature data. This allows to visualise the source of error on the size of volatiles resulting from the uncertainty in the exact impact time. The chosen feature is the same as the one already proposed in Figs. 1 and 4. Since the feature was extracted from the monitoring mode, the fit (red dashed line) on the residuals representing the density due to sublimation (black dots) is extended for sixty seconds (blue dotted line).