# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0728096        0.00313513    
     0.460000          0.700000         0.0758743        0.00309745    
     0.700000           1.00000         0.0956586        0.00396171    
      1.00000           1.54000          0.131238        0.00437816    
      1.54000           2.40000          0.126802        0.00560514    
      2.40000           4.80000          0.114203        0.00672867    
      4.80000           10.0000         0.0733253        0.00983706