# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0941447        0.00682763    
     0.460000          0.700000          0.101073        0.00509549    
     0.700000           1.00000         0.0986413        0.00468840    
      1.00000           1.54000         0.0832343        0.00438768    
      1.54000           2.40000          0.106964        0.00621868    
      2.40000           4.80000          0.108544        0.00671565    
      4.80000           10.0000          0.107790        0.00905552