# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.109786        0.00469435    
     0.460000          0.700000          0.107644        0.00363043    
     0.700000           1.00000          0.122320        0.00368913    
      1.00000           1.54000          0.128438        0.00404660    
      1.54000           2.40000          0.125882        0.00495780    
      2.40000           4.80000          0.123743        0.00603957    
      4.80000           10.0000          0.128893        0.00990844