# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.228957        0.00828386    
     0.460000          0.700000          0.214089        0.00669531    
     0.700000           1.00000          0.217258        0.00563004    
      1.00000           1.54000          0.189156        0.00610260    
      1.54000           2.40000          0.188362        0.00685614    
      2.40000           4.80000          0.160918        0.00905370    
      4.80000           10.0000          0.122347         0.0123676