Histograms of excess significance for PACS70 (left) and PACS100 (right) measurements. The purple dotted curve shows the noise distribution derived by Yelverton et al. (2019) for their PACS70 (left) and PACS100 (right) data sets, while the red dashed curve shows the same noise distribution derived from our PACS100 data set – our PACS70 data set was not large enough to robustly fit the noise distribution. The values noted as μ_Fit and σ_Fit are respectively the mean and standard deviation of the significance in our PACS100 distribution, while μ_Yel and σ_Yel are the onesfrom Yelverton et al. (2019).