[AstroPy] ffa in python

[gonghang.naoc]

Good ! Thanks !
Any comment about the comparison between ffa and fft?
Hang

On Tue, Jun 9, 2015 at 11:18 PM, R Schumacher <rays at blue-cove.com> wrote:

>  https://github.com/petigura/FFA/blob/master/FFA.py
>
>
>
> At 07:49 AM 6/9/2015, Anne Archibald wrote:
>
> I don't think there's a general FFA algorithm anywhere, though Vlad
> Kondratiev wrote a tool for applying the FFA to radio data, and I have some
> python code lying around somewhere. If you're searching for periodicities,
> the standard procedure is to search an FFT with incoherent harmonic
> summing; there are some pulsar searching tools that will do it (PRESTO, for
> example) quickly and efficiently. If you only have a handful of photons, or
> a modest number of periods to search, there are direct approaches that are
> more sensitive. If you have really a long time series, there is a trick
> where you do an FFT on the pairwise differences of photon arrival times.Â
>
> In short, there are a whole range of procedures for searching for
> periodicity in data. Can you be a little more specific about the problem
> you are trying to solve?
>
> Anne
>
> On Tue, Jun 9, 2015 at 4:44 PM gonghang.naoc <ghang.naoc at gmail.com> wrote:
>  Hi all,
> Is there any python resource about fast folding algorithm?  I have a
> series of arrival times for a lot of photons. I need to do some periodical
> test, but do not know how to start.
> Thank you.
> best
> Hang
>
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