# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0934711        0.00146331    
     0.460000          0.700000          0.102443        0.00128548    
     0.700000           1.00000          0.103255        0.00171388    
      1.00000           1.54000          0.108961        0.00152347    
      1.54000           2.40000          0.110549        0.00169138    
      2.40000           4.80000          0.105292        0.00202736    
      4.80000           10.0000         0.0912969        0.00285162