Indeed, Ernst, the trend of the peak heights “best fitting curve” seems to be a converging one. Perhaps it could also be a shadowing effect as a result of periodically higher mass transfer, (even cyclic ?). Anyway from “57700” a more significant trend is developing. One could also make a plot of V against R and compare it to the same for the EW’s.
Looks very promising! Nice work!
BTW, interesting programs to study ecliptic binaries are: BinSim: http://www.phys.lsu.edu/~rih/binsim/
and PHOEBE: http://phoebe-project.org/1.0/ both running on Unix/Linux/ Ubuntu and Windows platforms.
Kind regards,
Marc.