# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0350800        0.00642829    
     0.460000          0.700000         0.0587307        0.00706539    
     0.700000           1.00000         0.0729327        0.00563350    
      1.00000           1.54000         0.0959223        0.00662667    
      1.54000           2.40000          0.130363        0.00776180    
      2.40000           4.80000          0.153013        0.00984964    
      4.80000           10.0000          0.161434         0.0149589