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Fig. 10.

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O − C deviations of the mid-eclipse times vs. spin phase. Left: optical eclipse times collected by Echevarría et al. (2016, cyan) and by Siegel et al. (1989, red). The sinusoid fitted to all data has an amplitude of 20 s. Right: X-ray and EUV eclipse times observed with EXOSAT and GINGA (Rosen et al. 1988, 1991, cyan dots) and with the EUVE Deep Survey instrument (Hurwitz et al. 1997; Belle et al. 2002, red dots).

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