# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0815464         0.0303420    
     0.460000          0.700000         0.0892314         0.0159188    
     0.700000           1.00000          0.129114        0.00883283    
      1.00000           1.54000          0.127253        0.00484202    
      1.54000           2.40000          0.134084        0.00396780    
      2.40000           4.80000          0.131725        0.00437322    
      4.80000           10.0000          0.109242        0.00553502