Check this image out showing a star flare up in the field of view of my two ngc7635 images, separated by 101 days, (10/2/11-01/10/12). The changing Low Pixel Rejection maps are from subs that I acquired on 01/10/12. These subs are 120sec with a 5sec separation, I combined the first ten subs and integrated with Region of Interest (Preview Window 01), I then removed the first 4 subs and added the next four subs, keeping the total integration to 10 subs for each of the 11 Integrations.
Cleon