# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.230365        0.00454281    
     0.460000          0.700000          0.235168        0.00456366    
     0.700000           1.00000          0.168851        0.00582296    
      1.00000           1.54000          0.210313        0.00674170    
      1.54000           2.40000          0.263942        0.00716185    
      2.40000           4.80000          0.217868        0.00709548    
      4.80000           10.0000          0.172341        0.00996140