WBPP calibration error: Flat frame exposure differs from master dark exposure

Bruce Donzanti

This is a first for me. I've been this same approach for about 4 years and never got this error. What is odd, is that it really isn't an error as the exposures do match. To test this, I used a set of old NB and BB flats and dark flats and it works. If I replace the old data with the new set of darks and dark flats, the error appears. In addition, if I remove the new NB filter flats and dark flats, the error is gone, but adding the NB data back in along with the RGB data, the error comes up again. It appears the exposures from the flats are not matching up appropriately to the respective dark flat if all of the filter's flats and dark flats are entered at the same time. I checked the headers and all of the information is correct. Any idea what causes this to occur?

Bruce Donzanti

I think I just noticed the issue.............exposure tolerance under the Dark tab is set to 10 sec.  I need to lower it, as one option.  Or maybe set each one manually, which I have never done.

BlockHead

Yes to the dark frame exposure tolerance.

-the Blockhead