# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.162494        0.00288927    
     0.460000          0.700000          0.198180        0.00276136    
     0.700000           1.00000          0.267736        0.00355962    
      1.00000           1.54000          0.384044        0.00509276    
      1.54000           2.40000          0.605925         0.0105386    
      2.40000           4.80000          0.517809         0.0277475    
      4.80000           10.0000          0.646573          0.113134