# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.304451        0.00389548    
     0.460000          0.700000          0.354108        0.00312407    
     0.700000           1.00000          0.346028        0.00463072    
      1.00000           1.54000          0.321270        0.00371868    
      1.54000           2.40000          0.297424        0.00389038    
      2.40000           4.80000          0.248475        0.00487250    
      4.80000           10.0000          0.202786        0.00657105