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Fast Lomb-Scargle periodogram using Non-equispaced Fast Fourier Transform (NFFT) by B. Leroy

Project Description


This Python module provides the Fast Lomb-Scargle periodogram
developed by B. Leroy (2012, Astron. Astrophys. 545, A50)

It is based on the Non-equispaced Fast Fourier Transform (NFFTn as well as the FFTW3 library (
Both libraries must be installed.

Calling sequence:
(f,p) = period(t,y,ofac,hifac)

For more details, see the associated documentation
For a complete example, see

This Python module also provides the following methods:
- the Non-equidistant Fast Fourier Transform (NFFT, see of a time series:
(f,A) = nfft(t,y,p,d)
For more details, see the associated documentation

- the Discrete Fourier Transform (DFT) of a time series:
A = dft(t,y,f)
For more details, see the associated documentation

For a complete example, see

R. Samadi, LESIA (, Observatoire de Paris, 22 Dec. 2012

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