\begin{table}%t2 %\centering \par \caption{Journal of observations. $D$ is the dispersions (\AA/pix) at H$\alpha$ (0.19 corresponding to unbinned spectra, 0.38 to 2$\times$ binned spectra), and $\Delta \lambda$ is the wavelength coverage. The last column gives the program stars observed in each given run (the table is only available in electronic form).} \label{t2} \end{table}