Integrated X-ray light curves (1–10 keV) with comparisons of observations. The observational data are taken from Chernyakova et al. (2015) without error bars. The dashed line corresponds to the case of synchrotron radiation without the stellar disc while the solid line takes into account the presence of the disc. The dash-dotted line shows the effect of the disc matter clump at the shock front on X-ray emissions.