Astron. Astrophys. Suppl. Ser. 146, 397-406
Period analysis for simultaneous multichannel
J. You 1 -
J. Pelt 1,2 -
I. Tuominen 1
Send offprint request: J. You, e-mail: email@example.com
1 - Astronomy Division, Department of Physical Sciences,
P.O. Box 3000, FIN-90014 University of Oulu, Finland
Tartu Observatory, 61602 Tõravere, Estonia
Received June 15; accepted August 3, 2000
The method of three stage weighted period analysis is generalized
for simultaneous multichannel observations. The new method is based on
the phase dispersion minimization over all channels simultaneously.
The three stages in the full algorithm are
phase dispersion minimization method (PDM),
linear modeling (LM) and
nonlinear modeling (NLM).
Simple computational tests of the multichannel period analysis (MPA)
are presented. We show that the method
has advantages if compared with methods
where single channels are analysed separately.
We derive a general formula for spurious periods and
demonstrate that the interpretation of peaks in
the PDM spectra
can be more complicated than
in classical power spectra.
Key words: method: analytical -- data analysis
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