Comparison of the standard deviation σ_map measured from different simobserve realizations using 200 different random seeds (orange points and corresponding histogram) and the σ_map of the jackknifing for each corresponding mock observation (shaded blue squares). The thick blue line traces the total distribution of the derived standard deviations, σ_map when averaging over all the jackknife realizations for all the different simobserve seeds. Through jackknifing, we thus recover the true noise distribution of the observations.