# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0648063        0.00865091    
     0.460000          0.700000         0.0566366        0.00723280    
     0.700000           1.00000         0.0398855         0.0102858    
      1.00000           1.54000         0.0669736        0.00876509    
      1.54000           2.40000         0.0976316        0.00653224    
      2.40000           4.80000         0.0793876        0.00494924    
      4.80000           10.0000         0.0699674        0.00564375