ICEINSPACE
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Moon Phase
CURRENT MOON
Waxing Gibbous 60.7%
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24-09-2012, 11:58 PM
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Registered User
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Join Date: Jan 2009
Location: Adelaide
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Grus trio
Been testing my GSO RC12 with a set of faint fuzzies. Despite guiding issues ( I need to use the MOAG) with stars being not quite right I think this image looks ok. Not a lot of integration time, but given the star shapes I am inclined to resolve the guiding first.
Lots of faint little galaxies abide in the field, but the three main players are the real attraction. Each one has its own distinctive look.
Click here for image.
Feel free to critique.
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25-09-2012, 12:12 AM
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Join Date: Jan 2008
Location: Werribee, Australia
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Very nice on my phone Paul!
Darren
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25-09-2012, 10:27 AM
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PI cult recruiter
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Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
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A great result, Paul, especially if your guiding wasn't behaving.
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25-09-2012, 10:39 AM
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Highest Observatory in Oz
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Join Date: May 2006
Location: Canberra
Posts: 17,689
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Looks good to me Paul, yeh slightly wonky stars but still a good result  , more exposure won't do much here I don't think as there isn't anything else there really and they are bright galaxies 
Mike
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25-09-2012, 01:04 PM
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Join Date: May 2006
Location: Adelaide, South Australia
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You have been so busy Paul. New scopes and cameras galore - solar, deep sky, you name it. This looks promising. Once you get the guiding sorted I'd love to see you use that bigger plate scale on some more substantial galaxies like NGC 253 or 300. Looking forward to more.
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25-09-2012, 01:10 PM
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Billions and Billions ...
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Join Date: Mar 2007
Location: Quialigo, NSW
Posts: 3,143
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Nice image Paul! Shame about your guiding issues though. Why don't you process out the elongation - it's all in one direction so should be easy?
Cheers, Marcus
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25-09-2012, 01:55 PM
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Join Date: Aug 2006
Location: Sydney
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Paul
thats a great set of galaxies
Pete
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25-09-2012, 01:56 PM
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Very nice!
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25-09-2012, 03:17 PM
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Considering you had guiding issues this is still a great image, quite deep too looking at all the faint galaxies in the field!
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25-09-2012, 05:12 PM
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Join Date: Mar 2005
Location: Sydney
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Nice shot Paul.
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25-09-2012, 05:19 PM
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so many galaxies!
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25-09-2012, 05:35 PM
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JHT
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Join Date: Jun 2007
Location: Penwortham
Posts: 3,039
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Hi Paul,
Very nice!
Great to see what these galaxies look like with the resolution of the GSO RC12.
Cheers,
Justin.
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25-09-2012, 05:59 PM
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Join Date: May 2009
Location: Italy - Turin
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Seems to promise very well the GSO RC12".
Very nice.
All the best,
Leo
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25-09-2012, 06:11 PM
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Thanks guys for the thoughts.
Marcus how do I process out the elongation? Always good to learn new tricks.
Graeme, lots to do but so little time to do it in.
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25-09-2012, 06:33 PM
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Location: Brisbane
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Colours are nice but it appears that you have burnt out the smaller galaxy center (compared to this taked with a 10" GSO RC http://www.iceinspace.com.au/forum/a...e.php?a=122264) I guess it's all in the processing but it's nice to see you finally using the 12"
Allan
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25-09-2012, 07:02 PM
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Location: Singapore
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Very nice Paul, a slightly problem of tracking perhaps (not so evident to me), with longer exposures I am sure this will be a corker!
Clear skies
Marco
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25-09-2012, 09:28 PM
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Location: Canberra, Australia
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Hi Paul
the colour in the galaxies looks good, but as you say, you have to sort out the guiding.
Processing out the elongation in the stars is somewhat irrelevant because if your stars are elongated, so is the detail in the galaxies, and it is the latter which is the object of the image in my mind....its a bit like keeping really bad frames in an otherwise good data set.
cheers
Martin
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25-09-2012, 10:47 PM
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Billions and Billions ...
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Join Date: Mar 2007
Location: Quialigo, NSW
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Martin is right, there is no way to recover the lost detail in the subject, but you can mitigate the distraction of elongated stars quite easily if the elongation is minor as it is in your case.
This is a common method:
http://bf-astro.com/starRepair.htm
Cheers, Marcus
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26-09-2012, 11:44 AM
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Join Date: Apr 2010
Location: ardrossan south australia
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hi Paul - very nice image.
Try deconvolution in IRIS with an actual PSF as the kernel to tidy up the stars - will also restore some detail in the galaxies, but care needed with saturated star cores. the examples given in the link are hideous, but good enough to get across the idea.
http://www.astrosurf.com/buil/iris/t...2/doc30_us.htm
Failing that, Startools does a nice job on cosmetics, but generally needs some manual mask editing to ensure that only isolated stars are adjusted.
regards ray.
Last edited by Shiraz; 26-09-2012 at 05:00 PM.
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26-09-2012, 01:23 PM
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Join Date: Feb 2006
Location: Sydney
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You're off to a very promising start Paul.
Tough audience, not so long ago images with stars like that would've been OK!
Greg.
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