# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0752388        0.00530579    
     0.460000          0.700000         0.0817190        0.00472291    
     0.700000           1.00000          0.116335        0.00564217    
      1.00000           1.54000          0.136291        0.00713056    
      1.54000           2.40000          0.154435        0.00699870    
      2.40000           4.80000          0.142872        0.00980273    
      4.80000           10.0000          0.154790         0.0165510