# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.103795        0.00206119    
     0.460000          0.700000          0.138627        0.00199930    
     0.700000           1.00000          0.165089        0.00223504    
      1.00000           1.54000          0.200629        0.00248174    
      1.54000           2.40000          0.207676        0.00323870    
      2.40000           4.80000          0.204191        0.00442673    
      4.80000           10.0000          0.178994        0.00673569