Gee, thats odd. Did these appear in every image you took that night? At first I thought they might be from dark subtraction that didnt work right but they are only on the top part. I take it they are on the original raw unprocessed images and did not just appear after dark subtraction and flatfielding? I would have thought if it was fogging thered be haloes round the stars.
Darn nice image too
Scott
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