# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.700000         0.0389286         0.0264525    
     0.700000           1.00000         0.0691701         0.0187980    
      1.00000           1.54000         0.0199531        0.00791739    
      1.54000           2.40000         0.0336606        0.00472969    
      2.40000           4.80000         0.0254807        0.00494713    
      4.80000           10.0000         0.0317699        0.00485327