Fig. 5.
Panel a: light curve of a RRc star observed by the HIPPARCOS survey. The continuous blue line is the harmonic best fit. Panel b: natural logarithm of the absolute value of the estimated parameter by the CIAR model on the residuals of the harmonic model fitted with different frequencies; x-axis shows percentage variation from the correct frequency, y-axis shows the natural logarithm of . Panel c: natural logarithm of the estimated parameter by the IAR model on the residuals of the harmonic model fitted with different frequencies; x-axis shows the percentual variations from the correct frequency, y-axis shows the natural logarithm of .
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