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Looks like there's a bit of purplish colour across the whole image but that'll be easily corrected.
With DSS, I throw away subs which a) have less than 3/4 of the stars of the best images b) have significant tracking errors or large FWHM scores. It's worth mousing some stars in each image and checking their shape. If they are too elongated I just delete image off my hard-drive. I'll never use them anyway.
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