Distribution of PSZ2 objects as a function of the S/N of the SZ detection, and sample definition for this programme. For display purposes, we only show the S/N range up to 16, as this is the maximum S/N value in our sub-sample. The complete sample of sources at Dec > −15° (represented in light blue) has an additional 26 clusters uniformly distributed in the range 16 <  S/N <  50. The sources observed during LP15 are shown in red. The bin size is 0.5.