[AstroPy] ffa in python

[R Schumacher]

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 
><<mailto:ghang.naoc at gmail.com>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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