# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0263261        0.00814131    
     0.460000          0.700000         0.0245833         0.0107668    
     0.700000           1.00000         0.0246002         0.0212915    
      1.00000           1.54000         0.0254652         0.0207514    
      1.54000           2.40000         0.0240063         0.0253503    
      2.40000           4.80000         0.0108908         0.0360177    
      4.80000           10.0000         0.0433199         0.0353870