# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0580542        0.00452264    
     0.460000          0.700000         0.0841923        0.00420411    
     0.700000           1.00000         0.0982882        0.00587220    
      1.00000           1.54000          0.119048        0.00677047    
      1.54000           2.40000          0.150978         0.0132815    
      2.40000           4.80000          0.116788         0.0262922    
      4.80000           10.0000          0.155720         0.0679815