# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.700000         0.0133580        0.00731427    
     0.700000           1.00000         0.0603261        0.00822982    
      1.00000           1.54000         0.0218681         0.0123650    
      1.54000           2.40000         0.0533698         0.0147319    
      2.40000           4.80000         0.0623547         0.0149704    
      4.80000           10.0000         0.0625779         0.0325684