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Reading the thread it sounds like your subs aren't too noisy, just hot pixels being confused for stars. What I often do in troublesome cases is to use Dynamic Alignment to nicely align by hand three or five frames myself then put those save frames into Image Integration. ? This gives me a file I call tmpIntegration.
THIS is what I use as my integration target. Hot pixels and strong noise are greatly reduced in this file so confusion for actual stars goes away quickly, Confidence in found stars is increased and registration using this target is always good.
It also saves time mucking about with alignment settings I've already tweaked for the bulk of my captured data.
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