# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0435436        0.00710836    
     0.460000          0.700000         0.0223749        0.00664158    
     0.700000           1.00000         0.0248400        0.00475047    
      1.00000           1.54000         0.0238213        0.00312778    
      1.54000           2.40000         0.0356865        0.00289831    
      2.40000           4.80000         0.0310643        0.00352923    
      4.80000           10.0000         0.0313149        0.00527750