# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0461072        0.00169075    
     0.460000          0.700000         0.0460083        0.00167988    
     0.700000           1.00000         0.0362539        0.00216415    
      1.00000           1.54000         0.0510717        0.00193358    
      1.54000           2.40000         0.0277365        0.00277629    
      2.40000           4.80000         0.0669381        0.00400504    
      4.80000           10.0000         0.0300552        0.00448316