[AstroPy] timeing analysis(scipy.fftpack)

[gonghang.naoc]

Hi all,
Does anyone use scipy.fftpack to do power spectrum for time series?
Its doc file is here:
http://docs.scipy.org/doc/scipy-0.14.0/reference/tutorial/fftpack.html

What does the y axis in figure 1 and figure 2 mean? In Figure 1, it seems y
axis does not  stand for the sifnificane at least.

Besides FFT, I use Lomb-Scargle to do timing analysis, and find there is a
big difference between the significance given by L-S and fft. Significant
peaks which appear in L-S do not necessarily appear in FFT.
Which method should I believe then?

Thank you.
regards
Hang
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/astropy/attachments/20151022/efe773c5/attachment.html>