# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0703150        0.00401196    
     0.460000          0.700000         0.0785052        0.00396541    
     0.700000           1.00000         0.0905968        0.00503330    
      1.00000           1.54000         0.0933503        0.00619974    
      1.54000           2.40000         0.0991941        0.00772594    
      2.40000           4.80000          0.119710         0.0116941    
      4.80000           10.0000         0.0606538         0.0338972