# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.119397        0.00258130    
     0.460000          0.700000          0.113559        0.00240017    
     0.700000           1.00000          0.108628        0.00251717    
      1.00000           1.54000         0.0991088        0.00256797    
      1.54000           2.40000         0.0971124        0.00303869    
      2.40000           4.80000         0.0896251        0.00385417    
      4.80000           10.0000         0.0836430        0.00503607