Quote:
Originally Posted by Octane
Mike,
Cheers! I initially thought it was dodgy flats, too. But, I used DBE in PixInsight to extract the background in both the RGB and luminance images. It removed the gradient that was there and it's left me with this. Perhaps it is an artefact? I'm not sure. Might need to reprocess and see if it pops up again? Having said that, these same sets of flats have been used on other images that I've been working on and they seem to be void of this... who knows?
H
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Hmmm? dynamic background extraction huh? I dunno...never have trusted that...bit like deconvolution
I recon it might put in as much as it removes
There are many wide field examples of this area out there but I can't find one that shows these features
can anyone else?
Here is a deep AAO image with no sign of them..?
It's the two large faint brownish vertical swaths or bands on the left and right sides of H's image? I mean, yes, it does look kinda real but I have just never seen them before... and it's not as though you have done a super long exposure from a super dark sky or anything (although over 20hrs is nothing to sneeze at)...oh well, as you say, who knows, could be like my mysterious NGC 1232 jet
Regardless though it is a great looking image and I hope I don't sound like I am picking on the image, I'm not
...just intrigued
Mike