# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.127612        0.00457505    
     0.460000          0.700000          0.123301        0.00428223    
     0.700000           1.00000          0.122913        0.00477028    
      1.00000           1.54000          0.130956        0.00435862    
      1.54000           2.40000          0.116357        0.00503956    
      2.40000           4.80000          0.108402        0.00528652    
      4.80000           10.0000         0.0786432        0.00695928