Pulsed fraction dependence on the average X-ray luminosity (1−100 keV) measured from the four intensity-selected spectra (Table 1). Results in three energy bands are shown with the following symbols: triangles mark the pulsed fractions in the energy band 3−12 keV, squares in the band 12−78 keV, stars in the total band 3−78 keV. A small shift on the x-axis was applied for visualisation purposes.