# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.352155        0.00401097    
     0.460000          0.700000          0.355677        0.00370236    
     0.700000           1.00000          0.281836        0.00596943    
      1.00000           1.54000          0.285843        0.00651653    
      1.54000           2.40000          0.300556        0.00765928    
      2.40000           4.80000          0.269109        0.00765469    
      4.80000           10.0000          0.204752        0.00907546