# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000        0.00451839        0.00502071    
     0.460000          0.700000        0.00669387        0.00403025    
     0.700000           1.00000        0.00730723        0.00358431    
      1.00000           1.54000        0.00972365        0.00343193    
      1.54000           2.40000        0.00974229        0.00396657    
      2.40000           10.0000        0.00197504        0.00596622