# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0777261        0.00402094    
     0.460000          0.700000         0.0848029        0.00538636    
     0.700000           1.00000         0.0799931        0.00770140    
      1.00000           1.54000         0.0470168         0.0113199    
      1.54000           2.40000         0.0128992         0.0231995    
      2.40000           4.80000         0.0629394         0.0302615    
      4.80000           10.0000         0.0689018         0.0592459