# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0331310        0.00409220    
     0.460000          0.700000         0.0458159        0.00401577    
     0.700000           1.00000         0.0616301        0.00426606    
      1.00000           1.54000         0.0766518        0.00410754    
      1.54000           2.40000         0.0969405        0.00577315    
      2.40000           4.80000          0.116775        0.00740111    
      4.80000           10.0000          0.132629         0.0129088