# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0424344        0.00478777    
     0.460000          0.700000         0.0434789        0.00361357    
     0.700000           1.00000         0.0378594        0.00434892    
      1.00000           1.54000         0.0238786        0.00419957    
      1.54000           2.40000         0.0317319        0.00364787    
      2.40000           4.80000         0.0311905        0.00335425    
      4.80000           10.0000         0.0274912        0.00486094