A Cloudy/Xspec Interface
  We discuss new functionality of the spectral simulation code CLOUDY which allows the user to calculate grids with one or more initial parameters varied and formats the predicted spectra in the standard FITS format. These files can then be imported into the x-ray spectral analysis software XSPEC and used as theoretical models for observations. We present and verify a test case. Finally, we consider a few observations and discuss our results. 
R. L. Porter (1), G. J. Ferland (1), S. B. Kraemer (2), B. K.   Armentrout (2), K. A. Arnaud (3), and T. J. Turner (4) ((1) ...