Quote:
Originally Posted by CaptainCook
Attached are two figures from CR O'Dell et al 2004 "Unravelling the helix nebula: its structure and knots'', which analysed Hubble and ground based images, together my starless Ha as a comparison of what you are able to get from B7 Sydney. I am seeing all of these features after a few hours using a 6nm Ha filter and 300s subs- with the exception of the NE shockwave. Doubling integration time to 11 hours made no difference but the SNR helped reduce the background artefacts a bit more.
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Thanks Gary,
Yeh it’s a hard one this Helix as with most faint targets under heavy LP.
I’ve captured more Ha last night and tonight , so when I get some time I’ll process a new version just in Ha and see how it compares.
Cheers
Martin