Quote:
Originally Posted by Placidus
Hi, Steven,
This is really good juicy stuff. I like the science and what you are attempting. The article seems to show that there is no outer "edge", just as the sun's 'atmosphere' effectively extends to Pluto and beyond, just getting thinner and thinner. So the job becomes showing that at some given distance, the image is statistically significantly brighter than the background. That means getting a really good image of the background.
That in turn means a really cold chip, really good flats (that's where I fall down!), and an incredibly dark sky, so no thin cirrus, no moon, and photographing high above the horizon out of the mirk and skyglow.
Avoiding these sources of artifact might be even more important than long subs and a deep stack.
Good project and well worth doing.
Best,
Mike
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Thanks Mike.
Since I prefer to image the more obscure and fainter object, the background plays a very important role in processing for me.
Quote:
Originally Posted by RickS
An interesting experiment, Steven.
In fairly deep data (in particular, an image by Mike Sidonio and one of mine) I have seen an obvious lobe of halo to the South that extends as far as TYC6421-01351-1. Perhaps you need more data to pick that up?
Cheers,
Rick.
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Thanks Rick.
I had a look at your fine image.
Then it dawned on me I had used the wrong process, a legacy I suppose of processing an image a 4.00am.
The new image is up.
Regards
Steven