2023-11-21

double periodogram

Cole Johnston (Leuven) is in New York this week. We discussed the problem of finding oscillation modes in the photometry of stars in the presence of a large, binary-induced periodicity. What he kind-of wants is a simultaneous fitting of a flexible periodic function plus a periodogram. We did some experiments (very promising!) and discussed the elements that will come together to make this all happen. The final method will look like a double fourier transform, in which one frequency grid gets the periodic part, and the other grid gets the rest of the modes and noise.

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