ICEINSPACE
Moon Phase
CURRENT MOON
Waxing Crescent 31.6%
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01-07-2014, 12:21 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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Quote:
Originally Posted by Peter Ward
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Nup, don't like it - gave me a sore neck!  Say, is there an obscurely named PI function to rotate a field 90 degrees?
Quote:
Originally Posted by Peter Ward
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... and re-mount the RC!
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Idle threats! Glad to see the WWF fad fading though!
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01-07-2014, 12:33 PM
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PI cult recruiter
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Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
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Quote:
Originally Posted by marc4darkskies
Say, is there an obscurely named PI function to rotate a field 90 degrees? 
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Menu Image>Geometry>Rotate... will do it. If you want an obscure method then there are a few choices. PixelMath would be an entertaining one
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01-07-2014, 12:40 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,482
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Quote:
Originally Posted by graham.hobart
That is an amazing view Peter. Very impressive.
Graham
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Thanks Graham.
Quote:
Originally Posted by marc4darkskies
Nup, don't like it - gave me a sore neck!  Say, is there an obscurely named PI function to rotate a field 90 degrees?
Idle threats! Glad to see the WWF fad fading though! 
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Ha! I laugh at your taunt!
In PI...like in the Lego Movie... everything is awesome!
Process>Geometry>Fast rotation turns ordinary Mexican hats in Tolkien masterpieces, with just one click
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01-07-2014, 01:26 PM
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IIS Member #671
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Join Date: Dec 2005
Location: Canberra
Posts: 11,159
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My goodness, that is absolutely unbelieveable. :O :O :O
Fabulous work, there, sir.
H
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01-07-2014, 02:20 PM
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Registered User
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Join Date: Mar 2012
Location: Mornington Peninsula, Australia
Posts: 3,997
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awesome work Peter!!
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01-07-2014, 07:30 PM
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Registered User
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Join Date: Feb 2006
Location: Sydney
Posts: 18,185
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A very nice Sombrero. Detail rarely seen.
Greg.
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01-07-2014, 09:37 PM
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Registered User
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Join Date: May 2011
Location: Freo WA
Posts: 1,443
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Incidentally Peter, in your image it appears that M104 has a 'peanut' shaped halo surrounding the core. (Similar to NGC 5746).
It is quite a remarkable example of the processing technique required to reveal subtle, non-symetrical structure buried in an image with high dynamic range.
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01-07-2014, 09:51 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,482
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Quote:
Originally Posted by clive milne
Incidentally Peter, in your image it appears that M104 has a 'peanut' shaped halo surrounding the core. (Similar to NGC 5746).
It is quite a remarkable example of the processing technique required to reveal subtle, non-symetrical structure buried in an image with high dynamic range.
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While I try to "keep it real" when pushing the data, I'm always wary as to whether I'm introducing artifacts.
So the "peanut" is real? Seriously? I've never thought to check.
Quote:
Originally Posted by gregbradley
A very nice Sombrero. Detail rarely seen.
Greg.
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Appreciated Greg
Quote:
Originally Posted by rustigsmed
awesome work Peter!!
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Ta. Lego rules
Quote:
Originally Posted by Octane
My goodness, that is absolutely unbelieveable. :O :O :O
Fabulous work, there, sir.
H
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Thank you , but nah.....just plain Yoghurt
(...Spaceballs fans probably would appreciate this  )
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01-07-2014, 10:43 PM
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Registered User
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Join Date: May 2011
Location: Freo WA
Posts: 1,443
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Quote:
Originally Posted by Peter Ward
While I try to "keep it real" when pushing the data, I'm always wary as to whether I'm introducing artifacts.
So the "peanut" is real? Seriously? I've never thought to check.
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The light diffracted from the nucleus of the galaxy (by the spider vanes) will be roughly aligned with the peanut lobes. There is one sure way to confirm or deny whether it is a diffraction artefact or not... rotate the ota by 45 degrees and give it another go. Or just use the RH and see if it still there.
Last edited by clive milne; 01-07-2014 at 10:56 PM.
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02-07-2014, 09:18 AM
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Registered User
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Join Date: Mar 2011
Location: Brisbane
Posts: 936
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Quote:
Originally Posted by Peter Ward
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There is a serious scientific question in your image about the size (big?)(small?) of the bulge component of M104!
Galaxy Photometrists are still arguing about the nature and the size and the number of the spheroidal morphological component/components of this galaxy:
- how big is the bulge?
- how big is the halo?
- Or are the bulge and the halo, taken together as a unit, a single morphological component?
Cheers,
Robert
Astronomers have had similar problems with the bulge vs. the halo of our nearby neighbour M31 .
The resolution of these conundrums is usually found by separating out the various components of a galaxy....... by means of their constituent stellar orbits, stellar ages, and stellar heavy-element enrichments.
_____________________
Also muddying the waters in this regard is the fact that some galaxies also have very thick (broad) disk components.
______________________
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02-07-2014, 12:48 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,482
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Quote:
Originally Posted by madbadgalaxyman
There is a serious scientific question in your image about the size (big?)(small?) of the bulge component of M104!
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Quote:
Originally Posted by clive milne
The light diffracted from the nucleus of the galaxy (by the spider vanes) will be roughly aligned with the peanut lobes. There is one sure way to confirm or deny whether it is a diffraction artefact or not... rotate the ota by 45 degrees and give it another go. Or just use the RH and see if it still there.
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Thanks for your insight gentlemen.
I have used the RH on M104...but found the focal length was simply too short to provide any decent image scale...hence didn't persist with it.
Might be worth re-mounting the RCOS to see what gives
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02-07-2014, 03:04 PM
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Novichok test rabbit
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Join Date: Aug 2012
Location: Somewhere in the cosmos...
Posts: 10,389
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The detail is amazing - I studied the image for quite some time identifying as many background GX's as I could.
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02-07-2014, 05:33 PM
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Registered User
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Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
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Fabulous image for sure, has to be one of the best M104's out there. Awesome work Peter! 
Did you use PI drizzle integration?
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02-07-2014, 06:28 PM
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<--- Comet Hale-Bopp
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Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
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That's some impressive detail in the dust lane. And with 2008 data. Blimey. I didn't even have a DSLR in 2008.
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02-07-2014, 06:55 PM
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Registered User
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Join Date: Jan 2012
Location: Melbourne
Posts: 3,786
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Quote:
Originally Posted by Rod771
Very very nice Peter, well done! 
That's unbelievable!
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As I said
No one can beat the Advanced Chilean Robotic 32" Telescope.
But - Peter has come close with this latest pic although
the one on their website is not at full resolution.
here:
http://www.chart32.de/images/phocaga...umb_l_m104.jpg
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02-07-2014, 07:26 PM
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Galaxy hitchhiking guide
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Join Date: Dec 2007
Location: The Shire
Posts: 8,482
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Quote:
Originally Posted by alpal
As I said
No one can beat the Advanced Chilean Robotic 32" Telescope.
But - Peter has come close
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Well..I can say the Germans probably didn't have to contend with the light dome of 4 million Sydney-sider houses... or there abouts
I think the photographic term is: red brick-veneer-ial disease.
Quote:
Originally Posted by cometcatcher
That's some impressive detail in the dust lane. And with 2008 data. Blimey. I didn't even have a DSLR in 2008.
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The STL11002 + AOL I was using at the time remains a very capable system. With good seeing the AO was producing raw data that was tight as...err...some to do with fish.. comes next
Quote:
Originally Posted by SkyViking
Fabulous image for sure, has to be one of the best M104's out there. Awesome work Peter! 
Did you use PI drizzle integration?
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Thanks again Rolf..but, sorry, no drizzles were integrated or harmed during the making of this picture.
Quote:
Originally Posted by LewisM
The detail is amazing - I studied the image for quite some time identifying as many background GX's as I could.
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Many may have shifted.... perhaps into the red....
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05-07-2014, 07:46 AM
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Registered User
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Join Date: Mar 2005
Location: Sydney
Posts: 5,151
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Fine work Peter.
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