[pvelez (Pete)]

A call to all PI experts.

I have banding in my images. I suspect its introduced by the bias frames - but it might be the darks.

Have a look at the attached screenshot. This is an integration of 60 x 5 minute subs. Note the horizontal bands.

I can eliminate the bands by ditching the bias frames - but then this plays havoc with my flat division. As can be seen from the second attached screenshot.

Any thoughts? The Superbias module in PI gives me a similar result to the second attachment.

Pete