# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0135505        0.00600757    
     0.460000          0.700000         0.0217001        0.00597579    
     0.700000           1.00000         0.0392654        0.00920580    
      1.00000           1.54000         0.0665984        0.00831027    
      1.54000           2.40000         0.0364344         0.0103296    
      2.40000           4.80000        0.00585395         0.0164139    
      4.80000           10.0000         0.0255309         0.0192247