# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0319073        0.00821340    
     0.460000          0.700000         0.0443580        0.00609831    
     0.700000           1.00000         0.0509638        0.00821694    
      1.00000           1.54000         0.0441690         0.0108891    
      1.54000           2.40000         0.0668327         0.0123614    
      2.40000           4.80000         0.0933150         0.0167176    
      4.80000           10.0000          0.101478         0.0275504