Question related to the instrumental response correction

[Simon de Visscher]

Dear all,

I have one question regarding the correction of the instrumental response. In the "Assistant réponse" there is a flat field image calculation. For what I understand the series of flat to be indicated is the raw one, i.e. not treated. Can you confirm that the dark/offsets are subtracted from these flats in the response calculation process?

Best,

Simon

[Simon de Visscher]

Replying to myself

After checking carefully some pixels values, the offsets and dark are subtracted.

[Hamish Barker]

If you are using ISIS, you can find tools for preparing flats, darks and offset images from multiple input files on the "masters" tab.