# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0434712        0.00787796    
     0.460000          0.700000         0.0403209        0.00849343    
     0.700000           1.00000         0.0322648         0.0159640    
      1.00000           1.54000         0.0326719         0.0219717    
      1.54000           2.40000         0.0604377         0.0248281    
      2.40000           4.80000          0.102238         0.0274784    
      4.80000           10.0000          0.129600         0.0270309