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A comparison of two stack methods on the same data.
My usual QHY8 routine is:
1. subtract the darks (mono raw darks from mono raw frames)
2. debayer the calibrated frames (7.8x7.8 pixels, 1x1 grid)...back to colour
3. stack using translation /rotation (just in case something rotated)
4. crop to remove things that throw off the histogram
5. a gentle 1st curve ending linearly.
6. aggressive/moderate curve to suit seeing/data quality
7. colour adjustment/colour background adjustment.
8. sharpening to suit stars/ nebulosity (in layers if necessary.)
This time I used everything in the list except the rotate,
used fine star align ,and I resampled the debayered data before the stack.
It seems to have got better stars and nucleus on even a bad
data set (this was only 26 frames)
Some of my better sets were before twilight with 100frame sets .
I keep saying it...there is SO much in even mediocre data!
Steve
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