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Old 16-09-2020, 07:06 PM
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Atmos (Colin)
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47 Tuc

I've lost count to the number of times that I've attempted imaging this globular cluster. Has seemed to be that any night that had good seeing would cloud over just before hitting it or seeing would be 3-3.5". I've probably got some 20 hours of data in the 3-3.5" range that I could integrate but on Monday night I finally captured some data BEFORE the clouds come in. The end of the sequence was ruined but I did manage some 40 minutes of 1.2"-1.7" data which has been a dream to play with... Finally!!!

This is a crop towards the central part of the image.
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Old 17-09-2020, 07:24 PM
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Ryderscope (Rodney)
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Looks to be resolved very nicely into the core and the star colours are work very well too. Nice one Colin
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Old 17-09-2020, 08:05 PM
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Anth10 (Anthony M)
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Your persistence has paid dividends here Colin.
Very nice image of my fav glob.

Well done.
Anth
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Old 18-09-2020, 06:16 AM
Placidus (Mike and Trish)
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That exceptional seeing has produced an exceptional result.

We've been frustrated by very poor going on disgusting seeing here, so all we could do is go for depth. Perhaps if we get some good seeing, we can selectively use that for the brightest parts of the image.

Your patience has captured superb data, and you've processed it beautifully.
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Old 18-09-2020, 06:40 AM
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multiweb (Marc)
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Lovely colours and great resolution.
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Old 18-09-2020, 02:15 PM
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Atmos (Colin)
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Quote:
Originally Posted by Ryderscope View Post
Looks to be resolved very nicely into the core and the star colours are work very well too. Nice one Colin
Thanks Rodney, stars are resolving all the way down to the compact core. So much better than the bright blobby mass I've been accustomed to

Quote:
Originally Posted by Anth10 View Post
Your persistence has paid dividends here Colin.
Very nice image of my fav glob.

Well done.
Anth
Thanks Anthony, it is a big waiting game for good seeing. Sometimes has me thinking that if the seeing doesn't cooperate then it isn't even worth setting up.

Quote:
Originally Posted by Placidus View Post
That exceptional seeing has produced an exceptional result.

We've been frustrated by very poor going on disgusting seeing here, so all we could do is go for depth. Perhaps if we get some good seeing, we can selectively use that for the brightest parts of the image.

Your patience has captured superb data, and you've processed it beautifully.
Seeing is king when it comes to resolving in globulars. I've not long finished stacking the "best" 5 hours of other NGC 104 data I've got from 2.8"-3.8". Although the background looks a lot smoother, 40 minutes of good sharp data trumps 5 hours of average data. A single 120s exposure with FWHM trumps 5 hours under poor seeing

Quote:
Originally Posted by multiweb View Post
Lovely colours and great resolution.
Thanks Marc

Attached is a centre crop (500x500) at full resolution of the centre of 47 Tuc. The first has a FWHM around 1.45" while the second is around 3.2".
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Click for full-size image (Bleh.jpg)
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Last edited by Atmos; 18-09-2020 at 02:29 PM.
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