Ray,
I've done the dark subtraction. The results are confusing to me! The FWHM only changed a little, if at all. But, the aspects became terrible! Jeez, I hope they really are not that bad! I blinked two images - one dark subtracted, one raw. I could not detect anything by eye (other than a little bit of dark noise subtraction). I certainly couldn't see an aspect going from 8 into the 30s.
Check out the photo attached.
Thanks,
Peter
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