View Full Version here: : Revised my NGC 1763
glend
26-11-2016, 12:13 PM
My previous bi-colour NGC 1763 has been revised. I have added the Oiii, vetted each sub individually, and reprocessed in the SHO pallet.
Image consists of 5.5 hrs of data now, 2 hrs of Ha, 2 hrs of Sii, and 1.5 hrs of Oiii ( using 300sec subs). Slight crop to remove edge overlaps in the layers.
I believe it is an improvement. Lacks the magnification of Mike and Trish's wonderful image of this area, but for my setup and time invested I am pleased with it.
Astrobin detail page here, (including link to the old version):
http://www.astrobin.com/271975/B/
Full Screen here:
http://www.astrobin.com/full/271975/B/
Thumbnail is terrible as usual.
Placidus
26-11-2016, 12:56 PM
Brilliant!
Things we're especially glad to see:
(1) Just beyond N11 (Thor's Other Helmet), toward 5:30 from the centre, there's a very tiny nebula. We're really glad to see that in your image, it's also strong in SII. So that's yours, Fred V's, and ours, all showing that blob to be almost implausibly rich in SII.
(2) Toward top right in your nicely widefield image, there are two or three very distinct arcs of stars almost faultlessly aligned and centred on NGC 1761. This entitles us to write a fairy story which says that once upon a time there was a wicked king who forged iron into heavy things in the heart of a giant star, liberating neutrinos and initiating total collapse of his kingdom. The resulting shock waves compressed the distant lands, triggering these beautiful arcs of stars that you have shown. No doubt there are other explanations.
glend
26-11-2016, 02:20 PM
Thanks M&T, that arch of stars surprised me when i first noticed it, i was wondering if i had a bad reducer and was seeing some sort of optical abberation, but no nothing like that, it is what it is. Yes the tiny nebula below Thor's Other Helmet does come out nicely. Originally i had more red in the mix, which really brought it out, but dialed it back abit. I have not found a catalog reference to that little red neb, do you know if it is listed?. The globular cluster in the upper right, NGC 1783 i believe, also has a surprising amount of Sii in it.
Atmos
26-11-2016, 10:43 PM
Looking pretty good Glen, another one of those LMC regions that I'm going to have to have a go at :)
Are your stars elongated or is it my astigmatism? Sometimes hard for me to tell the difference :/
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