# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0790794        0.00642522    
     0.460000          0.700000         0.0931288        0.00444811    
     0.700000           1.00000          0.100285        0.00402742    
      1.00000           1.54000         0.0996399        0.00300377    
      1.54000           2.40000          0.100135        0.00411311    
      2.40000           4.80000         0.0906011        0.00427572    
      4.80000           10.0000         0.0741238        0.00667565