Quote:
Originally Posted by Placidus
That's already delightful, Marcus. One of the few emission nebulae that look good in luminance as opposed to H-alpha. Makes the stars sparkle.
We've always seen the jellyfish at top right as being a barbecued chicken seen from above, complete with drumsticks and Parson's Nose, with the fine filamentary structure you've captured so well being the crispy skin. But it could also be a jellyfish. That fits with the very obvious shark's fin at 8 o'clock to the jellyfish.
Excellent!
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Thanks very much M&T!! Barbeque chook eh? I'll take your word for it!
I didn't see the shark fin until you told me. I saw a star trek insignia instead - I guess that's very telling of my Star Trek fan status!
Quote:
Originally Posted by cometcatcher
That's really very sharp Marcus! My wife reckons that's a crocodile on the top left lol.
I've started this one too a few nights ago but the cloud keeps wrecking progress.
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Thanks Kevin! OK, a crocodile - why not!
I can see that now!
Quote:
Originally Posted by strongmanmike
Yes looking quite speccy Marcus  So are you saying to Greg above there is no decon used on this yet? It looks like Ha  ...seeing rules!
Mike |
Cheers Mike!
To clarify. I do bicubic sampling when registering my subs and that always increases FWHM a bit (in this case from 2.0 to 2.1 for the subs to 2.26 for the stack). To compensate for this AND to tighten up the stars (because I'm always oversampling) I always decon in CCDStack. In the first instance I decon'ed the stars only by dropping the signal level (Pixel math) so only stars are affected by the decon. This dropped FWHM to 1.8 and did not noticeably affect the neb or sharpen noise. I usually always do different decons too and layer them in PS. For example, when I have more data I'll also (gently) decon to include the neb and layer that decon'ed neb in PS. Oh yes, and I did do some contrast enhancement on the neb in PS too.
Bottom line - I
always decon and if you're not decon'ing your oversampled data - you're not processing your data fully IMO! Of course, if I had 1 arcsec seeing decon probably wouldn't be necessary.
