Two component fits to the XMM–Newton spectra consisting of two power laws, of which one is absorbed by cold material, and the other is not. A₁ is the normalization of the absorbed power law and A₂ is the normalization of the unabsorbed component, in units of 10⁻⁵ photons cm⁻² s⁻¹ keV⁻¹. Both power laws have fixed Γ= 1.9. Confidence limits are given at 95 per cent for one interesting parameter (Δχ²= 4); confidence limits that are truncated by the allowed fit range of the parameter, rather than by Δχ²= 4 are labelled with ‘*’. The ‘Prob’ column gives the null hypothesis probability corresponding to χ²/ν.