Contour maps between several continuum parameters during the 2007 outburst. Each map is calculated from RXTE data near maximum luminosity (red; obs. 93032-03-02-00) and at the end of the outburst (green; obs. 93032-03-03-04). The solid line represents the 1σ contour, the dashed line 2σ and the dotted line 3σ. The black-body flux, F_BB, is given in units of 10^-9   erg   s^-1   cm^-2.