Peranso supports the Lafler-Kinman algorithm
to search for periodicities in Cepheids and RR Lyrae variables

Peranso 1.34 features the implementation of the Lafler-Kinman algorithm (Lafler J, Kinman T.D., 1965). Lafler-Kinman is an effective method to analyze Cepheids or RR Lyrae time series in search for periodic signals. It is a so called "string-length method". These methods fold the observation data on a series of trial periods, and at each trial period the sum of the lengths of line segments joining successive points (the string-length) is calculated. Minima in a plot of string-length versus trial frequency indicate possible periods. Peranso implements other string methods such as Dworetsky and Renson.

References

Lafler J., Kinman T.D., An RR Lyrae Star Survey with the Lick 20-INCH Astrograph II. The Calculation of RR Lyrae Periods by Electronic Computer, Astrophysical Journal Supplement, vol 11, p. 216, 1965.

  

 
 

 
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