Table 1: Equivalent widths ( EWs, in units of mÅ) of various absorption lines observed in 1999, 2004 and 2006. The values of 1999 are taken unchanged from Israelian et al. (1999). A + sign indicates values actually quoted by the authors from the work by Shahbaz et al. (1999). Horizontal lines delimitate groups of lines for which only one EW can be measured.
Line Ion 1999 2004 2006
    (mÅ) (mÅ) (mÅ)
5167.32 Mg I - 940 $\pm$ 70 890 $\pm$ 65
5172.68 Mg I - 420 $\pm$ 50 475 $\pm$ 45
5183.60 Mg I - 510 $\pm$ 50 505 $\pm$ 50
6633.42 Fe I      
6633.75 Fe I 105 $\pm$ 15 $\la$100 $\sim$100
6634.12 Fe I      
6663.24 Fe I 80 $\pm$ 15 + $\sim$100 $\sim$100
6663.44 Fe I      
6677.99 Fe I 130 $\pm$ 15 + $\ga$100 $\la$100
6749.03 Cr I 80 $\pm$ 15 + $\sim$100 180 $\pm$ 60
6750.16 Fe I      
7771.95 O I      
7774.17 O I 1050 $\pm$ 80   1190 $\pm$ 100
7775.39 O I      
7780.56 Fe I 90 $\pm$ 15   160 $\pm$ 30
8446.24 O I      
8446.35 O I 530 $\pm$ 50   460 $\pm$ 60
8446.75 O I      
8467.15 Ti I      
8468.40 Fe I     560 $\pm$ 110
8468.50 Ti I      
8693.93 S I 230 $\pm$ 25   $\sim$100
8694.62 S I      
8728.01 Si I 250 $\pm$ 25   $\ga$100
8728.59 Si I      
8736.02 Mg I 200 $\pm$ 20   150 $\pm$ 60
8736.03 Mg I      

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