# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0146588         0.0129069    
     0.460000          0.700000         0.0339826        0.00591734    
     0.700000           1.00000         0.0303744        0.00496631    
      1.00000           1.54000         0.0257140        0.00326167    
      1.54000           2.40000         0.0301183        0.00326565    
      2.40000           4.80000         0.0243552        0.00441161    
      4.80000           10.0000         0.0235763        0.00689329