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    PR # 32029                                                                   
     We wish to continue our program to understand the X-ray spectrum from       
     O stars by observing Zeta Oph (O9.5V) with ASCA.  Zeta Oph is the           
     brightest single main sequence O star.  The ASCA spectrum will be           
     compared with ASCA X-ray spectra of the O giants Delta Ori, Lambda          
     Ori (obtained in AO1), Zeta Pup (PV observation) and  Zeta Ori (to be       
      obtained in AO2) to look for dependence of the X-ray spectra on            
      luminosity class and/or stellar wind mass-loss rate. In particular,        
      the ASCA spectra will be used to address the following questions: 1)       
      What is the temperature distribution of the hot plasma? 2) Does the        
      observed line emission indicate any evidence of chemical                   
      peculiarities similar to those seen in the ASCA spectrum of Delta Or       
    iand Lambda? 3) What is the le                                               
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