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Hi Andrew,
That's a top picture.
It's very difficult to process this target.
I would have used NASA FITS Liberator to do the stretching
but then again I don't have PI.
There are parts right at the center which should be brighter than they are.
The brightness is too uniform across the white & bright areas of the nebula.
I think you've lost some of the brightness information there.
As for the colours you can do anything with this nebula.
It definitely has unusual green colours in an RGB image
but yours is narrowband.
Thanks for sharing.
cheers
Allan
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