# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0222298        0.00161067    
     0.460000          0.700000         0.0220984        0.00161245    
     0.700000           1.00000         0.0269958        0.00180836    
      1.00000           1.54000         0.0259748        0.00179465    
      1.54000           2.40000         0.0203917        0.00215621    
      2.40000           4.80000         0.0244645        0.00276374    
      4.80000           10.0000         0.0156204        0.00383787