# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.700000         0.0714849         0.0148305    
     0.700000           1.00000          0.116446        0.00810933    
      1.00000           1.54000          0.119971        0.00361645    
      1.54000           2.40000          0.128648        0.00309866    
      2.40000           4.80000          0.125538        0.00313818    
      4.80000           10.0000          0.115604        0.00447846