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Title:
Period determination using phase dispersion minimization
Authors:
Stellingwerf, R. F.
Affiliation:
AA(Rutgers University, Piscataway, N.J.)
Publication:
Astrophysical Journal, Part 1, vol. 224, Sept. 15, 1978, p. 953-960. (ApJ Homepage)
Publication Date:
09/1978
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Curve Fitting, Light Curve, Periodic Variations, Statistical Analysis, Variable Stars, Cepheid Variables, Computer Techniques, Data Smoothing, Least Squares Method, Run Time (Computers), Significance
Comment:
A&AA ID. AAA022.122.024
DOI:
10.1086/156444
Bibliographic Code:
1978ApJ...224..953S

Abstract

We derive a period determination technique that is well suited to the case of nonsinusoidal time variation covered by only a few irregularly spaced observations. A detailed statistical analysis allows comparison with other techniques and indicates the optimum choice of parameters for a given problem. Application to the double-mode Cepheid BK Cen demonstrates the applicability of these methods to difficult cases. Using 49 photoelectric points, we obtain the two primary oscillatory components as well as the principal mode-interaction term; the derived periods are in agreement with previous estimates.

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