# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0298111        0.00248516    
     0.460000          0.700000         0.0307223        0.00236712    
     0.700000           1.00000         0.0336142        0.00265979    
      1.00000           1.54000         0.0320834        0.00308293    
      1.54000           2.40000         0.0379098        0.00416548    
      2.40000           4.80000         0.0388750        0.00641533    
      4.80000           10.0000         0.0401475         0.0119318