XMM–Newton EPIC-pn light curves of the observation 201 of Cyg X-1 with time bins of 10 s. The upper and the middle panels show, respectively, the 0.5 − 1.5 keV and the 3 − 10 keV light curves. The bottom panel reports the hardness, i.e. the ratio between count rates in the 3 − 10 keV and 0.5 − 1.5 keV energy bands. The vertical red line indicates the passage at superior conjunction (i.e. ϕ_orb = 0).