I have run the photometry pipeline on a number of patches and want to combine them into a final matched catalogue as has been done for the HSC PDR2 public catalogues. Is there already a task for merging patches or do I need to write a specific one for my dataset? Is there a command line task or other that would recreate the find HSC PDR2 catalogs. Presumably this involves a positional cross match taking the lower error measurement in cases of duplicates but I wondered if any cross match radii etc are computed automatically by a pipe task.
Alternatively are detections already consistent between patches at the mergeCoaddDetections stage? In that case can I simply merge patches by object id or use the Butler to retrieve a catalogue for multiple adjacent patches?