\begin{table}%t3
\caption{\label{t:elements-lines}Atomic parameters of the spectral lines used for each element.}
%%\centerline

{\small
\begin{tabular}{l c c  c c  c }
\hline\hline
Species                                               & $\lambda$ & $\chi$$_l$& log $\it {gf}$ & $EW$ (m\AA)   &  $EW$ (m\AA) \\
                                           &           &           &           & CoRoT-2 & CoRoT-4 \\
\hline
Na~{\sc i} &   5688.22  &  2.10  &  $-0.678$  &  133.7  &  110.3	\\
                    &   6154.23  &  2.10  &  $-1.602$  &   43.0  &   29.6	\\
                    &   6160.75  &  2.10  &  $-1.316$  &   64.0  &   43.0	\\
Mg~{\sc i} &   5711.09  &  4.48  &  $-1.706$  &  120.0  &  96.0	\\
            &   6318.72  &  5.21  &  $-1.996$  &         &  36.0	\\
Al~{\sc i} &   7835.31  &  4.02  &  $-0.738$  &   43.0  &  30.0	\\
            &   7836.13  &  4.02  &  $-0.569$  &   55.0  &  50.0	\\
Si~{\sc i} &   5665.56  &  4.92  &  $-1.980$  &   50.1  &   33.0	\\
                    &   5948.55  &  5.08  &  $-1.197$  &         &   81.8	\\
                    &   6142.49  &  5.62  &  $-1.518$  &   35.3  &   28.0	\\
                    &   6145.02  &  5.62  &  $-1.420$  &   41.0  &  		\\
                    &   6721.84  &  5.86  &  $-1.152$  &   52.8  &   48.0	\\
Ca~{\sc i} &   5581.97  &  2.52  &  $-0.728$  &  122.8  &   92.0	\\
                    &   5590.12  &  2.52  &  $-0.815$  &         &   82.0	\\
                    &   5867.56  &  2.93  &  $-1.599$  &    33.0 &  		\\
                    &   6166.44  &  2.52  &  $-1.171$  &    84.0 &   63.0	\\
                    &   6169.05  &  2.52  &  $-0.812$  &   113.6 &   90.0	\\
                    &   6169.56  &  2.52  &  $-0.567$  &   145.7 &  103.0	\\
                    &   6455.60  &  2.52  &  $-1.420$  &    72.1 &   45.0	\\
                    &   6471.66  &  2.53  &  $-0.848$  &   118.0 &   86.0	\\
Sc~{\sc ii}&   5526.82  &  1.77  &   0.111  &   85.0  &    83.0	\\
            &   6245.65  &  1.51  &  $-1.051$  &   37.0  &    33.0	\\
            &   6604.60  &  1.36  &  $-1.146$  &         &    41.5	\\
Ti~{\sc i}  &   5219.70  &  0.02  &  $-2.268$  &   46.4  &  		\\
                    &   5299.99  &  1.05  &  $-1.425$  &   29.4  &   16.0	\\
                    &   5866.46  &  1.07  &  $-0.827$  &   70.0  &   34.0	\\
                    &   6126.22  &  1.07  &  $-1.398$  &   32.7  &   12.0	\\
                    &   6258.11  &  1.44  &  $-0.450$  &   59.9  &  		\\
Cr~{\sc i} &   5296.70  &  0.98  &  $-1.411$  &   115.0 &     84.0	\\
                    &   5300.75  &  0.98  &  $-2.149$  &    70.0 &     51.0	\\
                    &   5345.81  &  1.00  &  $-1.036$  &         &    106.5	\\
                    &   5348.33  &  1.00  &  $-1.301$  &         &     88.0	\\
                    &   5783.87  &  3.32  &  $-0.220$  &    60.0 &     40.0	\\
                    &   5787.93  &  3.32  &  $-0.178$  &    55.0 &     43.0	\\
Mn~{\sc i} &   4265.92  &  2.94  &  $-0.442$  &         &  52.6	\\
                    &   4470.13  &  2.94  &  $-0.585$  &         &  43.0	\\
                    &   5399.47  &  3.85  &  $-0.098$  &    44.2 &  		\\
                    &   5432.54  &  0.00  &  $-3.636$  &    60.0 &  33.0	\\
Ni~{\sc i} &   5084.11  &  3.68  &  $-0.169$  &   106.0 &   86.8	\\
                                                      &   6327.60  &  1.68  &  $-3.100$  &    43.2 &   38.1	\\
                                                      &   6643.64  &  1.68  &  $-2.020$  &   111.0 &   92.3	\\
                                                      &   6767.77  &  1.83  &  $-2.170$  &    91.0 &   77.5	\\
                                                      &   6772.32  &  3.66  &  $-0.959$  &    54.8 &   49.4	\\
                                                      &   7788.93  &  1.95  &  $-1.951$  &   101.2 &   88.3	\\
Zn~{\sc i}			                      &   4722.16  &  4.03  &  $-0.390$  &    68.0 &  70.0	\\
                                                      &   4810.53  &  4.08  &  $-0.310$  &    87.0 &  75.0	\\
Ba~{\sc ii}                                          &   5853.69  &  0.60  &  $-0.848$  &    90.5 &   75.0	\\
                                                      &   6141.73  &  0.70  &   0.146  &   160.0 &  130.0	\\
                                                      &   6496.90  &  0.60  &  $-0.222$  &   136.0 &  109.0	\\
\hline
\end{tabular}}          
\tablefoot{Column 1: element; Col. 2: wavelength (in \AA\ ); Col. 3: excitation energy of the lower energy level in the transition (in eV); Col. 4: oscillator strengths based on an inverse solar analysis.; Col. 5: $EW$ for CoRoT-2; Col. 6: $EW$ for CoRoT-4.}                                  
\end{table}