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A Fast Chi-Squared Technique for Period Search of Irregularly Sampled Data
A new, computationally and statistically efficient algorithm, the Fast?2 algorithm (F?2), can find a periodicsignal with harmonic content in irregularly sampled data with nonuniformerrors. The algorithm calculates the minimized ?2 as afunction of frequency at the desired number of harmonics, using fastFourier transforms to provide O(Nlog N) performance. The code for areference implementation is provided.
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