# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0262360        0.00757797    
     0.460000          0.700000         0.0306910        0.00695077    
     0.700000           1.00000         0.0300117         0.0105448    
      1.00000           1.54000         0.0359107        0.00994853    
      1.54000           2.40000         0.0636364        0.00785976    
      2.40000           10.0000         0.0339091        0.00906391