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    PR # 31510                                                                   
     We propose to observe with the ASCA SIS the Herbig Be star HD~200775,       
      a pre-main-sequence star of intermediate mass. While evidence exists       
       that X-ray emission of Herbig stars arises from their winds, ROSAT        
      PSPC data do not allow to determine uniquely a model for the X-ray         
     emission, the data being compatible both with Raymond spectra (with         
     different temperatures) or a power-law spectrum. These alternative  m       
     odels have different implications on the phenomena taking place in  t       
     he wind. We present simulations of SIS spectra, showing that the  obs       
     ervations we propose are able to discriminate clearly between the  va       
     rious emission models, giving us further insight into the nature of t       
     he strong activity of these stars.                                          
                                                                                 
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