# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0490602        0.00196525    
     0.460000          0.700000         0.0496931        0.00197108    
     0.700000           1.00000         0.0466272        0.00213878    
      1.00000           1.54000         0.0464072        0.00221964    
      1.54000           2.40000         0.0438026        0.00317615    
      2.40000           4.80000         0.0397349        0.00464359    
      4.80000           10.0000         0.0553669        0.00747023