On Wed, 9 Mar 2005 08:22:17 -0800, Richard Crisp <rdcrisp@No-Spam> wrote:
> the lower left hand side of the image shows a hard to see green circle. I
> had a dust mote in my [OIII] data that my flatfield failed to remove.
What's a flat field? An image taken with a cover over the primary,
which is then subtracted from all the other images?
Received on Wed Mar 9 09:27:06 2005