# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.181418        0.00557202    
     0.460000          0.700000          0.185893        0.00508193    
     0.700000           1.00000          0.203710        0.00614358    
      1.00000           1.54000          0.305695        0.00907193    
      1.54000           2.40000          0.325432         0.0147741    
      2.40000           4.80000          0.269030         0.0291147    
      4.80000           10.0000          0.352404         0.0681621