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Hi all
and many thanks for the generous feedback.
the small red dots are indeed stars (not faults in noise rejection/hot pixels not removed in the SII frames) and they are most certainly a result of the pallette used. Many people shoot RGB to layer on top, but I have refined a technique which almost completely removes the magenta stars/halos common with NB imaging. I will demonstrating this at Lostock.
....and yes, you are absolutely right about the star halos..I am aware of this and thought I had taken care of it....clearly not...so I will be fixing that tonight and replacing the image on my website. Thanks for pointing it out...you are also right about the difficulty associated with NB imaging....its not straightforward considering that some objects are barely visible at these wavelengths....the Helix Nebula at SII is typical of this....I have currently got 16 hours SII on this object and its still not enough.
Cheers
Martin
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