# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.103036         0.0260603    
     0.460000          0.700000         0.0466689         0.0274201    
     0.700000           1.00000         0.0648652         0.0110380    
      1.00000           1.54000         0.0818358        0.00360505    
      1.54000           2.40000         0.0940172        0.00294766    
      2.40000           4.80000          0.105052        0.00277387    
      4.80000           10.0000          0.111569        0.00431175