Comparison of the power spectra obtained by the Fourier and maximum entropy methods (ME, Fahlman and Ulrych, 1982) for Jensen's et al. (1983) X-ray light curves of the intermediate polar star candidate TT Arietis confirms that the methods give consistent results. However, the ME method has higher resolution in frequency, and at least in some cases, it has the ability to select the correct period among aliases. The author found that of the two close optical periods of the star, the spectroscopic period is the one which manifests itself also in X-rays.
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