Re: [vsnet-chat 5768] Re: [AAVSO-DIS] survey, pixy etc > And thus > you would report R magnitudes, which should be fairly close for variables > with B-V < 1.0 or so. Literally don't report your observations with "R". These observations are "unfiltered CCD observations" whose zero-point is adjusted to R system. (Suppose you have a good estimate of B-V for a certain star. With such information, one can reasonably estimate B magnitudes from V-band observations only. But it is not an approved practice to report B observations estimated from V band observations. The situation is same for unfiltered CCD observations). As a reminder, preferably use the code "Rc" instead of less informative "R", when the observations are done with Kron-Cousins R system. This is to avoid a confusion with Johnson R system. Regards, Taichi Kato