[Heian (Mark)]

Hi all,
Does the instrument response of the ccd vary according to the class of object (star) being measured with a SA100?

I've been watching the video tutorials on RSpec and there is a comment that suggests you need an instrument response for each class of star.

I would have thought that the response is dependent on the CCD chip, and as such, is independent of the object being measured.

Comments?

Mark