# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.110184        0.00223552    
     0.460000          0.700000          0.111568        0.00180678    
     0.700000           1.00000          0.113303        0.00177218    
      1.00000           1.54000          0.115861        0.00187426    
      1.54000           2.40000          0.118116        0.00237541    
      2.40000           4.80000          0.113645        0.00313865    
      4.80000           10.0000          0.111666        0.00486967