# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.164072        0.00183029    
     0.460000          0.700000          0.183935        0.00179308    
     0.700000           1.00000          0.208400        0.00215231    
      1.00000           1.54000          0.240097        0.00213239    
      1.54000           2.40000          0.255991        0.00306703    
      2.40000           4.80000          0.236564        0.00385617    
      4.80000           10.0000          0.184361        0.00617038