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Fig. 3


Like Fig. 1. In this particular simulation, a fortuitously good fit is obtained from data with a rather large scatter: the reduced chi-square against the intrinsic ephemeris was 1.43, whereas the reduced chi-square against the ephemeris fit (solid line) is 0.97. However, the fit’s period has a rather large error, 2.5 times as large as the period-error given by Eq. (7)(dashed lines).

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