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Thanks for the kind comments everyone. I've been busy with work and my daughters wedding so haven't spent much time on astro stuff this last couple of weeks. I haven't yet had another look at the data but have a couple of ideas which may improve the core area. I will have another look at all the data tomorrow night on night shift.
Dave, yes it's just ha as the red channel with OIII at about 70% for green and the same OIII at 100% for the blue channel. I have seen images where one or both emmisson lines can be combined and used as a luminous layer after filtering, sharpening etc with photoshop but in this case that is not what I have used, yet anyway.
Thanks again everyone.
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