# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0275934         0.0233220    
     0.460000          0.700000         0.0496626         0.0110398    
     0.700000           1.00000         0.0402732         0.0195338    
      1.00000           1.54000         0.0535271         0.0146216    
      1.54000           2.40000         0.0762345        0.00804538    
      2.40000           4.80000         0.0479134        0.00535095    
      4.80000           10.0000         0.0408398        0.00603790