This is the same data (27 exposures, 3 minutes each) as in the previous post. Four different ways of combining the exposures, and two different methods of removing background coloration (an overwhelming green from the light pollution filter I was using) from the resulting image.
I think the second one (“integration-ABE1-“) is best, but I was a bit slapdash in preparing the images for posting, so that may be an issue…