The Smith book does discuss a bump at the bottom and and a hump prior to the maximum but I agree that more data is needed. Cheers, Michael On Monday, July 28, 2003, at 10:58 AM, Arne Henden wrote: > I don't recall seeing many bumps near maximum on RR Lyrs. There > is almost always a bump near minimum, but that is not what your > light curve shows. I think more data is needed.