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Thanks MnT and Mike. It was good to find out it is real. The exposure time for all channels is 300 seconds (approximately 30 subs per channel) which is more than enough for the galaxy. This question has however prompted a thought that one could do longer exposures (and/or more of them) to capture some more detail in the IFN and then process that separately. It's getting a bit too late in the year now to do that for this object but is certainly something to consider for next season.
Clear skies.
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