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View Full Version here: : NGC2070 - Tarantula Nebula through C14

GCO
05-09-2008, 04:03 PM
http://www.gco.org.au/st8/C14_Images/ngc2070-haRGB.jpg

Hi Everyone,

With out C14 at the Grove Creek Observatory, via our public remote telescope service called "Skylive", we took a 1 hour exposure through a 13nm Hydrogen Alpha Filter and RGB 10 min exposures, using our SBIG ST8XME CCD camera, at the above URL.

Comments welcome.

There are other samples of our recent work at:
www.gco.org.au/st8/ (http://www.gco.org.au/st8/)
gregbradley
05-09-2008, 05:09 PM
Fantastic image.

Greg.
bluescope
05-09-2008, 05:35 PM
Wonderful image, perhaps a larger version would let us see the mass of detail better ?

:thumbsup:
Matty P
05-09-2008, 06:17 PM
That's superb! Excellent work guys!

Very well done. :thumbsup:
Alchemy
05-09-2008, 06:32 PM
another roboscope.... good stuff, :thumbsup:
Ric
05-09-2008, 06:32 PM
A lovely image, fascinating colours and nice depth and detail.

Very enjoyable.
peeb61
05-09-2008, 07:02 PM
Very nice indeed....lots of detail, I want one!
h0ughy
05-09-2008, 07:09 PM
great stuff - so this was done with a rent a wreck? There is certainly a heap of data detail in that image, full credit for your image processing skills.
theodog
05-09-2008, 07:27 PM
I appreciate the work and equipment used, but sorry something seems wrong to me. I know this is against the other posts and maybe it'll grow on me.
drmorbius
05-09-2008, 07:35 PM
fantastic... you guys amaze me...
leon
05-09-2008, 09:29 PM
I don't really want to push the issue, but I am of the opinion of Jeff, :whistle:however I to can understand the time and effort that went into capturing this object, certainly well captured, and plenty of great detail, but the colours just seen so.........don't know. :shrug:

Leon :thumbsup:
jase
06-09-2008, 02:43 PM
Good effort. Had a closer look at the larger version - http://www.gco.org.au/st8/C14_Images/GC2070-RGB.jpg
You could almost mistake this image for a narrowband image instead of a conventional HaRGB blend. Not sure what happened there...still some great details on display - attributed to the Ha data no doubt. Managing stars in HaRGB blends is difficult and I suspect you experienced this. The stars from the Ha data are tight and small compared to broader filters such a LRGB. Its near impossible to use the Ha data alone for luminance. I think the image would have been better if you also capture some luminance or created a synthetic from the RGB data. This would bring the stars back and provide a more asthetic image. Perhaps next time...look forward to seeing more.
GCO
08-09-2008, 03:55 AM
You need to follow the URL in the origanal image for the full ST-8 version:

http://www.gco.org.au/st8/C14_Images/GC2070-RGB.jpg (http://www.gco.org.au/st8/C14_Images/GC2070-RGB.jpg)
GCO
08-09-2008, 03:58 AM
If I follow you correctly, we are certainly NOT part of that organisation!! This is a non-commercial organisation at Grove Creek called "Skylive". For further details see:

www.gco.org.au/skylive/ (http://www.gco.org.au/skylive/)
GCO
08-09-2008, 04:09 AM
Hi Jase,

Thanks for your comments. The reason it looks different, is that Astronomik have produced a wider band Ha filter in the 13nm region, rather than the "normal" 6nm range. When we compared the 2 filters side-by-side, we found that the new 13nm Ha filter allowed a lot more detail in on a broader range of objects, plus provided a better selection of guide stars with the wider band pass.

Therefore, we obtained the new typeII LRGB set, with a Ha 13nm, SII and OIII set for our 10 position filter wheel with the ST-8 on the C14 @f/6.9.

Although the "balance" of adding RGB 10min exposures to this 1 HOUR LONG Ha image, instead of a L channel, is somewhat of a ascetic blend as there really is no real reference to use. Only the RGB channels were balanced.