# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0277740        0.00155986    
     0.460000          0.700000         0.0266434        0.00150775    
     0.700000           1.00000         0.0266369        0.00167987    
      1.00000           1.54000         0.0258247        0.00163683    
      1.54000           2.40000         0.0215082        0.00208997    
      2.40000           4.80000         0.0253536        0.00262214    
      4.80000           10.0000         0.0137231        0.00390691