# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000           1.00000         0.0120080        0.00643992    
      1.00000           1.54000         0.0471639        0.00705485    
      1.54000           2.40000         0.0489805        0.00584439    
      2.40000           4.80000         0.0375076        0.00514481    
      4.80000           10.0000         0.0171788        0.00632447