# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0922561         0.0509685    
     0.460000          0.700000         0.0789641         0.0330108    
     0.700000           1.00000         0.0795180         0.0153974    
      1.00000           1.54000         0.0882810        0.00593784    
      1.54000           2.40000          0.107793        0.00434389    
      2.40000           4.80000          0.118573        0.00435483    
      4.80000           10.0000          0.116211        0.00669824