Hi Lenny,

You put the pedestal value at the calibration of lights and make sure that the box to subtract this is ticked at integration ( I think) . However I think that it is unusual to need to use pedestals.
I would check that your darks have been integrated correctly. I have found that it is better to integrate darks uncalibrated and as these contain the bias signal there is no need to use a master bias in lights calibration. So try using uncalibrated darks and no bias and see if this makes the difference. I have never found that it is necessary to use a pedestal since I have been using uncalibrated darks.
Just a suggestion.

Mike

Read More...