# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.205595        0.00144320    
     0.460000          0.700000          0.220048        0.00134497    
     0.700000           1.00000          0.225785        0.00148274    
      1.00000           1.54000          0.240949        0.00187188    
      1.54000           2.40000          0.237484        0.00265005    
      2.40000           4.80000          0.212986        0.00389875    
      4.80000           10.0000          0.195729        0.00665670