# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.574049        0.00798734    
     0.460000          0.700000          0.591697        0.00780569    
     0.700000           1.00000          0.681179         0.0108327    
      1.00000           1.54000          0.796433         0.0194326    
      1.54000           2.40000          0.833838         0.0311828    
      2.40000           4.80000          0.685353         0.0428776    
      4.80000           10.0000          0.458291         0.0679615