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    PR # 31204                                                                   
     Observations of the giant low surface brightness (LSB) spiral galaxie       
     s are proposed. These objects have unusually high luminosity and the        
     high mass to the luminosity ratio. Since the serendipitous discovery        
     of Malin 1 by optical survey in 1987, only three LSB spirals are know       
     n. Though the disk component of the galaxy is quiescent, the active n       
     ucleus shows Seyfert like narrow and broad line emissions.  Lying in        
     the low density part (void) of the universe, the disk component seems       
      to evolve extremely slower than that of the usual disk galaxies. As        
     well as the possible contribution of these nuclei to the CXB radiatio       
     n, observation of these objects will clarify the evolution of the gal       
     axies in the low density region. The proposed targets are "F568-6" an       
    d "Malin 1".                                                                 
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