# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0823350         0.0268430    
     0.460000          0.700000         0.0958213         0.0180622    
     0.700000           1.00000          0.157870         0.0105443    
      1.00000           1.54000          0.192464        0.00505488    
      1.54000           2.40000          0.165231        0.00384429    
      2.40000           4.80000          0.143819        0.00386352    
      4.80000           10.0000          0.135277        0.00575834