# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0191380        0.00883798    
     0.460000          0.700000         0.0174256        0.00801928    
     0.700000           1.00000         0.0108960        0.00755855    
      1.00000           1.54000         0.0156247        0.00680394    
      1.54000           4.80000         0.0104999        0.00682496    
      4.80000           10.0000         0.0239200         0.0177532