3. Vela X-1
 
   RA= 09 02 06.8
   DEC= -40 33 17.0
 
   Count rate = 0.25
   1st order  = 0.16
 
   Phase Dependence: Y
             Epoch : 49164.353
             Period: 8.9644
             Max   : 0.98+/-0.01
             Min   : 0.02+/-0.01
 
  Remarks:
  It is important that the observation is placed the eclipse center as close as 
possible.