# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.672683        0.00624492    
     0.460000          0.700000          0.674318        0.00691267    
     0.700000           1.00000          0.768348        0.00796521    
      1.00000           1.54000          0.901679         0.0118087    
      1.54000           2.40000          0.775306         0.0169278    
      2.40000           4.80000          0.678349         0.0291192    
      4.80000           10.0000          0.447275         0.0530056