# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0925249        0.00487348    
     0.460000          0.700000         0.0897578        0.00457033    
     0.700000           1.00000         0.0990502        0.00419582    
      1.00000           1.54000         0.0899382        0.00375389    
      1.54000           2.40000         0.0853431        0.00414931    
      2.40000           4.80000         0.0661236        0.00414384    
      4.80000           10.0000         0.0520343        0.00647695