# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0659097        0.00722683    
     0.460000          0.700000         0.0668697        0.00785514    
     0.700000           1.00000         0.0994164        0.00590124    
      1.00000           1.54000          0.118738        0.00691514    
      1.54000           2.40000          0.144276        0.00805889    
      2.40000           4.80000          0.166703         0.0102758    
      4.80000           10.0000          0.131010         0.0166147