\begin{table}%t1
\caption{\label{obs_imaging:tab}Journal of observations -- Imaging.}
%\centering
\small
\begin{tabular}{ccccccc}
\hline \hline 
Date of obs. &      Telescope/  &  Filter  & Resolution & Seeing & Exp. time  & Notes                      \\
(d, m, y)   &         instrument  &  band & ($\arcsec$/pixel) & ($\arcsec$) & (s) & objects observed \\
 \hline 
14.05.2006  & ESO-NTT/EMMI  & H$\alpha$ & 0.166 & 0.8 & 3600 & HH52, HH53, HH54 \\
12.05.1995  & ESO-NTT/EMMI  & H$\alpha$ & 0.266 & 1.1 & 3600 & HH52, HH53, HH54 \\
31.03.1993  & ESO/MPG2.2-m/EFOSC2  & H$\alpha$ & 0.35 & 0.9 & 4500 & HH52, HH53, HH54 \\
08.05.1992  & ESO/MPG2.2-m/EFOSC2  & H$\alpha$ & 0.35 & 1.4 & 5400 & HH52, HH53, HH54 \\
15.01.1990  & ESO/MPG2.2-m/CCD  & H$\alpha$ & 0.35 & 1.0 & 6000 & HH54 \\
03.02.1989  & ESO/MPG2.2-m/CCD  & H$\alpha$ & 0.35 & 1.0 & 4200 & HH54 \\
04.03.1987  & ESO/MPG2.2-m/CCD  & H$\alpha$ & 0.35 & 1.2 & 3600 & HH54 \\
14.05.2006  & ESO-NTT/EMMI   & [\ion{S}{ii}] & 0.166 & 0.7 & 3600 & HH52, HH53, HH54 \\
31.03.1993  & ESO/MPG2.2-m/EFOSC2  & [\ion{S}{ii}] & 0.35 & 1.0 & 4200 & HH52, HH53, HH54 \\
09.02.1991  & ESO/MPG2.2-m/EFOSC2  & [\ion{S}{ii}] & 0.35 & 1.1 & 1800 & HH52, HH53, HH54 \\
14.01.1990  & ESO/MPG2.2-m/CCD  & [\ion{S}{ii}] & 0.35 & 0.8 & 4800 & HH52, HH53 \\
01.02.1989  & ESO/MPG2.2-m/CCD  & [\ion{S}{ii}] & 0.35 & 1.2 & 3600 & HH52, HH53 \\
28.02.1987  & ESO/MPG2.2-m/CCD  & [\ion{S}{ii}] & 0.35 & 1.5 & 3600 & HH52, HH53 \\
01.01.2005  & ESO-VLT/ISAAC      & H$_2$ & 0.148 & 0.5 & 40 & HH54 \\
02.07.2002  & ESO-VLT/ISAAC      & H$_2$ & 0.148 & 0.5 & 60 & HH54 \\
06.06.1999  & ESO-NTT/SofI       & H$_2$ & 0.29 & 1.0 & 300 & HH52, HH53, HH54 \\
31.03.1999  & ESO-NTT/SofI       & H$_2$ & 0.29 & 0.9 & 600 & HH52, HH53, HH54 \\
15.03.1995  & ESO/MPG2.2-m/IRAC2b       & H$_2$ & 0.51 & 1.1 & 500 & HH52, HH53, HH54\\
10.04.1993  & ESO/MPG2.2-m/IRAC2b       & H$_2$ & 0.51 & 1.7 & 200 & HH54 \\
03.04.1993  & ESO/MPG2.2-m/IRAC2b       & H$_2$ & 0.51 & 1.7 & 200 & HH52, HH53 \\
01.09.2007  & ESO-NTT/SofI       & H$_2$ & 0.29 & 1.0 & 1080 & IRAS~12500-7658 \\
01.09.2007  & ESO-NTT/SofI       & $K_{\rm s}$ & 0.29 & 1.0 & 270 & IRAS~12500-7658 \\
\hline
\end{tabular}
\end{table}