Fig. 5.
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Pmod detection in the O–C diagrams. We show Δχ2 as a function of modulating period Pmod for the final best-fitting model to the O–C diagrams in Fig. 4. Odd QPEs are shown in red, even ones in blue. We explored a wide range of Pmod between 4 d and 90 d, and all other local minima are noisy (i.e. neighbouring data points to the local minimum have much higher Δχ2 value).
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