AL Gem
Cester1979 - Cester1979U (Johnson U)
As stated in the references, fitting Koch’s (1963) UBV light curves consistently has never been accomplished. The primary eclipse depths in the three filters do not correspond. I have tweaked Cester et al.’s (1979) model somewhat to match the B filter, but it still is too deep in V and not deep enough in U. My suggestion is to secure a modern set of UBV curves and see if this condition persists, or perhaps it is an artifact of Koch’s standardization problems and/or change in photocells as noted in his paper.