The total spectrum resulting from a power-law illumination of cold material, i.e., the power law together with its reflection spectrum. The reflected spectrum is calculated following Lightman and White (1988), Ap.J., 335, 57, but with opacities calculated for cold material from Morrison and McCammon (1983), Ap. J., 270, 119. The reflected spectrum is assumed to scale as the cosine of the inclination angle. This is not a bad approximation at small angles but is increasingly inaccurate at large inclinations, especially as doppler effects are not included in this code. See George and Fabian (1991), M.N.R.A.S., 249, 352; and Matt, Perola and Piro (1991), Astron. Astrophys., 247, 25 for more accurate calculations of inclination effects. As Compton down-scattering is important, the X-ray spectrum beyond the 2-20 keV band can affect the calculated shape of the reflection spectrum. The recommended maximum energy cut-off is 0.6 (= 300 keV).
