# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0569298        0.00618800    
     0.460000          0.700000         0.0690297        0.00883633    
     0.700000           1.00000         0.0806354         0.0132532    
      1.00000           1.54000          0.140391         0.0160380    
      1.54000           2.40000          0.129705         0.0306411    
      2.40000           4.80000          0.214555         0.0395744    
      4.80000           10.0000          0.278929         0.0828866