Re: Help Needed with Software

[Tass Mailing List <tass@mail.alembic.net>]

Date: Sun, 29 Apr 2007 22:13:37 +0200
From: Paul Bartholdi <Paul.Bartholdi@obs.unige.ch>
To: Tass Mailing List <tass@mail.alembic.net>,
     Thomas F. Droege <droege@fastmail.fm>
Subject: Re: Help Needed with Software

Dear Tom,

Thank you for your good news concerning your health. I hope it will
continue and give you some more time to use also for yourself the data
gatthered for last many years.

The two packages attached are very new and, from the published
articles, are uptodate concerning the kind of analysis you want to do.
In truth, I had no time yest to use these programs, but they are very
high on my list of priorities. My own procedures are SuperMongo
macros, based on the articles of Terry Deeming in the early seventies
(I will look for the reference and send them to you later).
Irregularely sampled data frequency analysis is not an easy task, but
a fascinating one. Nyquist frequency has no meaning in most cases.
Even very sparse data can be used to find high frequencies, much
higher than the reciprocal of the shortest interval.

I hope you can do something with the attached files.

Warmest regards,     Paul

On 4/28/07, Tass Mailing List <tass@mail.alembic.net> wrote:
>
> Date: Sat, 28 Apr 2007 11:46:05 -0500
> From: Thomas F. Droege <droege@fastmail.fm>
> To: tass@tass-survey.org
> Subject: Help Needed with Software
>
> Hello all,
>
> Since I am feeling better, I plan to spend some timer analyzing data.  I
> want to do a search for periodic variables.  My bet is that in doing
> this more data will beat out noise in the data.  By plotting it, one
> should be able to see the period well into the noise.
>
> I need software that takes a list of time/values and looks for any
> periodic content.  I assume that this is some fft like thing that looks
> at the data and finds the most probable period.  I suppose that this
> cannot be automated very well, so I am willing to look at intermediate
> data.
>
> I am also interested in scripts and software for plotting.  I assume
> gnuplot is what is used, so sample scripts would be most useful for me
> to learn the process.
>
> I will be running under Linux, so no Windows stuff, please.
>
> Tom Droege
> --
>   Thomas F. Droege
>   droege@fastmail.fm
>
>
>


-- 
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Paul Bartholdi
Chemin de la Barillette 11
CH-1260 NYON
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SparSpec_Linux.tar.gz

SigSpec.bin

SparSpec_pdf.pdf

SigSpec0703160.pdf

SigSpecManual.pdf