[Aavso-photometry] Multi-color photometry

[Brian C. Barnes]

>>I think Brian is calling standard stars comp stars.

Yes. Sorry everyone for the confusion. There are two phases to doing the
transformations - the first is finding the transformation coefficients by
imaging standard fields. I was calling the stars in this field "comp" stars
because they are of known magnitudes - like the comp stars used when doing
differential photometery on program stars.

Thanks everyone for your input.

Brian.