# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.284061        0.00155086    
     0.460000          0.700000          0.309558        0.00137737    
     0.700000           1.00000          0.357880        0.00178741    
      1.00000           1.54000          0.382158        0.00164270    
      1.54000           2.40000          0.362012        0.00190484    
      2.40000           4.80000          0.314345        0.00220366    
      4.80000           10.0000          0.259139        0.00301548