Quote:
Originally Posted by niharika
Hi Rick, I need to clarify something. Do you see an increase in FWHM if you apply cosmetic correction? I am getting an increased FWHM according to ccdinspector when applying cosmetic correction compared to not applying cosmetic correction. FWHM does not get effected if I use Defect List for columns only but will get effected once I select 'Use Auto Detect'; hot sigma 3; cold sigma 3. Is it expected?
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No, I wouldn't expect that. I'd use the real time preview on CosCorrect to check out what is happening to the stars and adjust the sigma parameters if needed. It could also be that CCDI's FWHM calculation isn't terribly robust. You could see what the FWHMEccentricity script thinks of your before and after versions.
Cheers,
Rick.