# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0160935         0.0133724    
     0.460000          0.700000         0.0506381        0.00762235    
     0.700000           1.00000         0.0246172         0.0119429    
      1.00000           1.54000         0.0710069        0.00944277    
      1.54000           2.40000          0.130926        0.00669551    
      2.40000           4.80000         0.0919122        0.00440632    
      4.80000           10.0000         0.0501732        0.00463838