# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.207352        0.00389123    
     0.460000          0.700000          0.211116        0.00400531    
     0.700000           1.00000          0.214825        0.00517811    
      1.00000           1.54000          0.215870        0.00499983    
      1.54000           2.40000          0.203236        0.00612979    
      2.40000           4.80000          0.147012        0.00648882    
      4.80000           10.0000          0.117445        0.00838230