# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0465124        0.00557706    
     0.460000          0.700000         0.0623484        0.00650133    
     0.700000           1.00000         0.0558961         0.0105022    
      1.00000           1.54000         0.0680371         0.0146157    
      1.54000           2.40000         0.0377124         0.0231404    
      2.40000           10.0000         0.0172255         0.0346564