# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.121247        0.00478815    
     0.460000          0.700000          0.152955        0.00485275    
     0.700000           1.00000          0.136878        0.00649358    
      1.00000           1.54000          0.148831        0.00560735    
      1.54000           2.40000          0.128433        0.00680001    
      2.40000           4.80000          0.110043        0.00887242    
      4.80000           10.0000         0.0828560         0.0133761