Period determination following Fourier analysis and fine tuned based on visual inspection and  tests of the resulting light curves. Data windowing result (top) and power spectrum result (bottom), showing a clear peak at 737 days and the expected alias around 1, 27, 29 and 365 days (in the spectral window), together with their n-harmonics. The power spectrum is dominated by two strong periods, not due to interference from the spectral window at 376 and 737 days.