# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.104903        0.00474013    
     0.460000          0.700000          0.112477        0.00467338    
     0.700000           1.00000          0.125831        0.00620091    
      1.00000           1.54000          0.138736        0.00630118    
      1.54000           2.40000          0.132841        0.00610314    
      2.40000           4.80000          0.138200        0.00709797    
      4.80000           10.0000         0.0952320        0.00931319