# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0339027        0.00296544    
     0.460000          0.700000         0.0327815        0.00280909    
     0.700000           1.00000         0.0280721        0.00316919    
      1.00000           1.54000         0.0213696        0.00274825    
      1.54000           2.40000        0.00786977        0.00436841    
      2.40000           4.80000        0.00359898        0.00832174    
      4.80000           10.0000         0.0859849         0.0116001