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Thanks for your comments. As a skinny data experiment of course it has some problems as a result of that approach. I purposely held back the RGB saturation in the galaxy core so that the Ha would not be swamped. I should have shot the Ha with 5 min subs at least, instead due to lack of time, i tried to use 2 min ones and boost the gain (which is very doable with the ASI1600). Out of curiosity I also tried single Oiii and Sii subs and was surprised that useful data was there. I believe it is feasible to build a narrowband image of M83, and i may try that once the inevitable cloud allows.
Last edited by glend; 25-02-2017 at 12:35 PM.
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