export_for_starfish accepts aperture corrections
FakeReader.export_for_starfish accepts qual cuts

Quality cuts can be made against sharpness, roundness and
crowding of the artificial star photometry. Artificial
stars outside the bounds are labelled as 'dropouts'.

This is perhaps a temporary measure; FakeReader should
have an ability to store these cuts at a class level
and propagate them to all artificial star test analyses.