# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0191787         0.0286421    
     0.460000           1.00000         0.0198637         0.0100249    
      1.00000           1.54000         0.0652919        0.00576416    
      1.54000           2.40000          0.103344        0.00296930    
      2.40000           4.80000          0.110684        0.00201820    
      4.80000           10.0000          0.104155        0.00227486