# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0104024        0.00331851    
     0.460000          0.700000        0.00583612        0.00410987    
     0.700000           1.00000        0.00764803        0.00434196    
      1.00000           1.54000         0.0159720        0.00361392    
      1.54000           2.40000         0.0102058        0.00633394    
      2.40000           4.80000         0.0153309        0.00713407    
      4.80000           10.0000         0.0310361        0.00844478