# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.101718        0.00465193    
     0.460000          0.700000          0.101779        0.00482594    
     0.700000           1.00000         0.0642337        0.00658085    
      1.00000           1.54000         0.0601989        0.00736542    
      1.54000           2.40000         0.0571604         0.0107516    
      2.40000           10.0000         0.0316555         0.0110622