Left temporal evolution and right luminosity dependence of the continuum parameters (see text for definitions) and 10 keV feature for the fits with the CutoffPL continuum. The color gradient from reddish to blueish data points indicates the temporal evolution of the outburst. The data points show results from the initial fit run, where a variable number of cyclotron lines was used. Green data points in the left column correspond to the second fit run with a fixed number of three cyclotron lines (only in the left column), which was been performed as a consistency check (see text for details). Where no green points are visible, both fits gave the same results. L_X is in units of 10³⁷   erg   s^-1. A_G and A_Fe are in units of photons   s^-1   cm^-2, while A_Fe is in multiples of 10^-3.