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  #21  
Old 07-05-2016, 09:48 PM
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Shiraz (Ray)
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Most impressive Ray - a fine effort!

Cheers

Steve
Thank you Steve, much appreciated. regards ray
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  #22  
Old 09-05-2016, 11:05 AM
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rustigsmed (Russell)
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spectacular stuff Ray what a brilliant part of the sky!
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  #23  
Old 09-05-2016, 07:06 PM
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Ah the good ol' Antlia Cluster, wonderful to see another image of it, and a fine one for sure Ray! In total there must exist upwards of a staggering handful of images of this cluster now, it's almost becoming mainstream lol
That faint reflection nebula looks interesting. Being such a large scale gradient I certainly can't deny that in my version it could have succumbed to the process of bringing out the smaller scale IcL and IFN structures.
As for the distant background cluster, yes there in fact indeed many of those all over the FOV. They look awesome seen though the main cluster - really puts the distances into perspective.
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  #24  
Old 09-05-2016, 08:17 PM
deeplook (Markus)
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Very nice and deep image Ray! Looks spectacular to me, perfect.

Markus
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  #25  
Old 10-05-2016, 06:37 PM
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spectacular stuff Ray what a brilliant part of the sky!
Thanks Russell. you are right, it is a beaut part of the sky.

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Originally Posted by SkyViking View Post
Ah the good ol' Antlia Cluster, wonderful to see another image of it, and a fine one for sure Ray! In total there must exist upwards of a staggering handful of images of this cluster now, it's almost becoming mainstream lol
That faint reflection nebula looks interesting. Being such a large scale gradient I certainly can't deny that in my version it could have succumbed to the process of bringing out the smaller scale IcL and IFN structures.
As for the distant background cluster, yes there in fact indeed many of those all over the FOV. They look awesome seen though the main cluster - really puts the distances into perspective.
Thanks very much Rolf. Nothing like as deep as your magnificent image, but it was still rewarding to see so many galaxies.

I am still not completely convinced that the large scale nebulosity is real - have been going over the processing again today and have not yet found any issues, but I need to redo the bias, to make sure there is no drift there. Even the slightest offset or bias error can show up when going this deep. I had cleaned the mirrors in preparation for this target, so that should have been OK - mind you they have picked up a lot of dirt since then.

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Very nice and deep image Ray! Looks spectacular to me, perfect.

Markus
Thanks very much Markus - appreciated

regards ray

Last edited by Shiraz; 10-05-2016 at 06:49 PM.
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  #26  
Old 10-05-2016, 08:02 PM
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Wow! What a fantastic image Ray. I could swim around in that all day and still not see it all.
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  #27  
Old 10-05-2016, 10:04 PM
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Shiraz (Ray)
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Wow! What a fantastic image Ray. I could swim around in that all day and still not see it all.
Thanks Rex. Glad you enjoyed it - appreciate the comments.
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  #28  
Old 11-05-2016, 12:06 PM
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multiweb (Marc)
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Very crowded field. Love the highres. Lots to see.
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  #29  
Old 11-05-2016, 03:03 PM
clive milne
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Excellent shot Ray...

I'm not sure whether this is good news or bad news, but you have your system operating at a level where the limit appears to be lateral charge diffusion.

Incidentally ... did you mask (the bright stars) for decon?
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  #30  
Old 11-05-2016, 06:04 PM
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Fantastic image Ray
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  #31  
Old 11-05-2016, 11:39 PM
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Very crowded field. Love the highres. Lots to see.
Thanks Marc. there sure are lots of galaxies out there - real thrill to see them appear out of the noise.

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Originally Posted by clive milne View Post
Excellent shot Ray...

I'm not sure whether this is good news or bad news, but you have your system operating at a level where the limit appears to be lateral charge diffusion.

Incidentally ... did you mask (the bright stars) for decon?
Hi Clive. I have been thinking about the need for finer sampling - it seems that my original design assumption of 2 arcsec as the best possible seeing was a bit pessimistic. Oh well, not a bad problem to have I guess. FWIW, the biggest gain in seeing came from putting the scope in a temperature controlled ROR observatory.

For this image, very little deconvolution was needed, since the original stack was about 2.2arcsec FWHM. I don't do any masking for deconvolution on the basis that the original convolution I am trying to wind back was a global process - and the PixInsight deconvolution process has effective clamping to minimise ringing on saturated stars. However, am open to alternative ideas.

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Fantastic image Ray
thanks Dave - appreciated.

Last edited by Shiraz; 12-05-2016 at 12:01 AM.
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