# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.461370        0.00281271    
     0.460000          0.700000          0.458832        0.00315051    
     0.700000           1.00000          0.522540        0.00399193    
      1.00000           1.54000          0.497238        0.00435385    
      1.54000           2.40000          0.442065        0.00494763    
      2.40000           4.80000          0.353525        0.00521937    
      4.80000           10.0000          0.261410        0.00611579