Reflection Spectra from Photoionized Accretion Discs
  We review recent progress on the modeling and use of reflection spectra from irradiated and ionized accretion discs. On the computational side, calculations of reflection spectra from discs with non-uniform density structure have shown that thermal instabilities can effect the predictions. Ionized reflection spectra have been used effectively in fitting data of Narrow-Line Seyfert 1 galaxies, and have placed constraints on the strength and shape of soft X-ray emission lines. 
D.R. Ballantyne (1), R.R. Ross (2), A.C. Fabian (1) ((1) IoA,   Cambridge (2) Holy Cross)