# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.418351        0.00319491    
     0.460000          0.700000          0.420739        0.00370612    
     0.700000           1.00000          0.465808        0.00495540    
      1.00000           1.54000          0.449942        0.00601682    
      1.54000           2.40000          0.418802        0.00629753    
      2.40000           4.80000          0.309143        0.00755727    
      4.80000           10.0000          0.201954        0.00955468