# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.188206        0.00181668    
     0.460000          0.700000          0.208878        0.00191656    
     0.700000           1.00000          0.223841        0.00212391    
      1.00000           1.54000          0.233035        0.00228249    
      1.54000           2.40000          0.229636        0.00319967    
      2.40000           4.80000          0.206272        0.00397874    
      4.80000           10.0000          0.189546        0.00615158