# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0661895        0.00437954    
     0.460000          0.700000         0.0643438        0.00432133    
     0.700000           1.00000         0.0624127        0.00480903    
      1.00000           1.54000         0.0605410        0.00420691    
      1.54000           2.40000         0.0498539        0.00551075    
      2.40000           4.80000         0.0507517        0.00642601    
      4.80000           10.0000         0.0241721         0.0129891