# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0739405        0.00600379    
     0.460000          0.700000         0.0780757        0.00432106    
     0.700000           1.00000         0.0733573        0.00439346    
      1.00000           1.54000         0.0861655        0.00341533    
      1.54000           2.40000         0.0815426        0.00363921    
      2.40000           4.80000         0.0943085        0.00420749    
      4.80000           10.0000         0.0698954        0.00592863