Project: datamanagement
Issue DM-3417: Fix overestimation of aperture correction error
We're overestimating the aperture correction errors by including photon noise twice: both in the aperture correction errors and the original measurement errors. This is a migration of [HSC-1277|https://hsc-jira.astro.princeton.edu/jira/browse/HSC-1277] to LSST, which is where it should be fixed.
Story points: 8