\begin{table}%t2
\caption{\label{obs_spec:tab}Journal of observations -- Spectroscopy.}
%\centering
\small
\begin{tabular}{ccccccc}
\hline \hline 
Telescope/  & Date of obs.  & Wavelength &  $t_{\rm int}$ & PA & ${\cal R}$ & Encompassed knots \\
Instrument  & (d, m, y) &  ($\AA$) & (s) &  ($\degr$)  &   \\
 \hline 
ESO-NTT/   & 14.05.2006 & 6200--7000    & 2700 & 52    & 3000 & HH52:~A3-A4, A1, D4; HH53:~C-C1, E1;\\
EMMI       &            &               &      &       &      & HH54:~G-G0, G1-G3, C2, C3 \\
ESO-VLT/ISAAC   & 01.01.2005 & 16~400         & 3600 & 29.5  & 10~000 & HH54:~Z, A3, A1, B, J-J1, H3, H2 \\
ESO-VLT/ISAAC   & 01.01.2005 & 16~400         & 3600 & 160.5 & 10~000 & HH54:~C3, C1, H3, J-J1, E, K \\
ESO-2.2-m/      & 20.02.1987 & 6200--6800    & 3600 & 89.5  & 2000  & HH53:~B, A, C, F2; HH54:~X4~C, X1~D  \\
Boller \& Chivens (B\&C)      & 21.02.1987 & 6200--6800    & 3600 & 89.5  & 2000  & HH53:~B, A, C; HH54:~X3, X1~A \\
                & 25.02.1987 & 6200--6800    & 3600 & 75   & 2000& HH52:~B, A, D3-D2; HH54:~X4~B-A \\
\hline  
\end{tabular}
\end{table}