Comparison between the median binned mask sizes for Campaigns 0–4 excluding targets from AGN/galaxy GO proposals³; hatch-shaded regions indicate the IQR for the mask sizes. For a better visualisation we only show the comparison for . Left: mask sizes obtained for K2P²; shown are also the Aigrain et al. (2015) (full black) and Armstrong et al. (2015) (dashed black) relations, which are given in all panels. Middle: mask sizes obtained from the Vanderburg & Johnson (2014) light curves when a pixel-response-function (PRF) fit is performed. Right: mask sizes from the data products prepared by the photometric analysis (PA) component of the Kepler science processing pipeline. Black crosses mark the extended targets from the GO proposals 3048. The top panel shows a zoom up to mask sizes of 15 pixels, indicating the possibility of masks down to a single pixel.