Quote:
Originally Posted by RickS
Mike,
The theory is sound and so long as you know the point spread function it should work perfectly. In practice you have to estimate (or guess) the PSF. Also, the decon implementations in packages like PI and CCDStack can only deal with a single global PSF when in real life the PSF can vary across different parts of the image.
Still, you can get reasonable results in PI so long as you have data with good SNR and don't push it too far. It has a nice tool, DynamicPSF, which helps estimate the PSF.
Cheers,
Rick.
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All my understanding too...
But in a nut shell, if not applied using area/feature specific valid PSF's it is indeed creating an illusion and potentially simply making small bright irregular shapes in, say a galaxy arm, into small dots with new shapes that when viewed as a whole makes an image or area of an image
look sharper but it is no longer the
real detail as it were
...I'm still out on this but granted when applied well it can make the image look higher res, so I guess that's part of it anyway
Quote:
Originally Posted by Stevec35
Pretty good effort Mike. It's a deceptively difficult galaxy this one.
Cheers
Steve
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Yeah quite a faint outer arm area with this one
Quote:
Originally Posted by Logieberra
Mike.Nice! How you enjoying the seeing out that way? Any stats? How does it compare to the Cbr burbs? Darker, no doubt  |
Hi Logan, hard to scientifically quantify seeing, even when scouting for pro observatories, so anecdotal is the best we can do I guess...and with this in mind I think the seeing here at Wallaroo is probably about as good as I remember Canberra being when I was imaging from Campbell during the second half of 2006, maybe marginally better? It was probably a little better seeing and more consistently so when I lived at Googong though, where I was at almost 800m ASL imaging with the Starfire during 2004-2006 (was a drought on). It is obviously noticeably darker here at Wallaroo than Campbell and about the same as Googong although when I lived in northern Ngunnawal in 2002 the skies there were quite dark except to the south and the seeing again was about as good as here ie some good nights some crap
I did have a good handful of nights with what I would class as exceptional seeing at Googong but so far, although I have had a few nights I would call
good, I have probably only seen one or two nights from Wallaroo that I would describe as getting close to exceptional seeing and that was the nights I did
THIS image and
THIS image.
Tis certainly rather windy here (did I ever mention that
)...but the dome stopped that issue in its tracks
Not sure all that was really all that meaningful
but I can say this - as far as seeing goes, all sites I have used in the Canberra region are better and more consistently so than anywhere I imaged from around Newcastle between 2008 - 2012 and excellent dark skies are only a 20min drive beyond the edge of Canberra but are only found driving
much further from Newcastle and even then they are not as good.
Quote:
Originally Posted by SkyViking
Beautiful image of a beautiful galaxy, Mike There is a lot going on in that image and it seems you captured all the faint outer parts. Some interesting background galaxies too, and the little spiral above is cool
It could be very interesting to see a side-by-side comparison with a version from your FLI. |
Cheers Rolf
it came out ok in the end I guess and seems to compare favourably with the few examples available on the net done with larger longer FL scopes.
What are you thinking with the FLI?...less resolution..? Maybe I should image something I did with the ProLine from here just to compare...? Have you heard of the Antennae galaxies by any chance
maybe I should do those with the new setup?
Quote:
Originally Posted by astronobob
Grouse one Mike, , amaizing details in the Galaxy central dust lanes ! Im flat out getting such in Andromeda
Always dig your colour processing aswell.
Another Mighty fine show of your work |
Thanks Bob, love your easy attitude and warm candour, should be more of it on here
MIke