# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000           1.00000        0.00760195         0.0101231    
      1.00000           1.54000         0.0227905         0.0118399    
      1.54000           2.40000         0.0511398        0.00508366    
      2.40000           4.80000         0.0374770        0.00324284    
      4.80000           10.0000         0.0211019        0.00301839