Stellar Atmosphere and Accretion Disk Models for the Hot Component in   Symbiotic Stars
  We describe our NLTE codes which allow the computation of synthetic spectra of hot stars and accretion disks. They can be combined to compute ionizing fluxes from the hot component in symbiotic stars. 
K. Werner, J.L. Deetjen, S. Dreizler, T. Nagel, T. Rauch