Hello everyone here,
I've got the Color 178 Camera, cooled and I'm making some progress with it (this is my first serious venture into CCD asttrophotography) and I have this thing happening in the upper right corner and across the bottom of all my images, regardless of where they were taken.
You can see the glow from the upper right corner that starts to show up as you do your level stretching and all that. And a strange mottling across the bottom with a glow in the lower right.
The only preprocessing I've done is remove bad pixels since I don't really understand the whole bias current thing yet, Could that be what I'm facing here? Is there a way to do that after the fact?
For this image (NGC 253) the cooling was on (-30°C) and it is 17 one minute exposures were stacked in Nebulosity 4, processed there and then more in photoshop. This issue is preventing me from recovering the lower right portion of the galaxy and I'm hoping there's some bit of knowledge out there I don't know that will help.
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