When entering the comparison and check magnitudes the help says:
"Comparison Star Magnitude
The instrumental magnitude of the comparison star that you used. A decimal point is required.
Check Star Magnitude
The instrumental magnitude of the check star that you used. A decimal point is required."
I have presumed (correctly I hope) that the "instrumental magnitude" as referred to elsewhere is the instrumental magnitude obtained by the photometry software (Iris in my case) and NOT the transformed magnitude for the Comparison and Check stars (using the derived coefficient) - correct?
Thanks in advance.