# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.159463        0.00154901    
     0.460000          0.700000          0.160287        0.00148676    
     0.700000           1.00000          0.156981        0.00176933    
      1.00000           1.54000          0.149001        0.00205517    
      1.54000           2.40000          0.126682        0.00308711    
      2.40000           4.80000          0.111861        0.00408261    
      4.80000           10.0000         0.0814467        0.00742330