\begin{table}%T1 
\caption{\label{tab-HH-X}Physical properties observed in \mbox{X-ray}-emitting HH jets.}
\small%\centering
\par
\begin{tabular}{lccccccccl}
\hline
\hline\noalign{\smallskip}
object   &  $t_{\rm exp}$ &  cnts        & $L_{\rm X} $            & $T_{\rm X}$   & $L_{\rm j}$ & $z_{\rm X}$ & $D$   &  LM/HM  & Reference \\
         &  [ks]          &              &[$10^{29}$ erg s$^{-1}$] & [$10^{6}$ K] & [arcsec]    & [AU]        &  [pc]  &         \\
\hline\noalign{\smallskip}
HH 2     & $21.4$         & $11$         & $5.2$   	           & $1$	   & $2$     & $56~000$\tablefootmark{c}   & $480$  &  LM~& \citet{pfg01} \\
HH 154   & $97$           & $63$         & $3$	     	           & $4$	   & $5$     & $70{-}140$    & $140$  &  LM~& \citet{fbm06}\tablefootmark{d} \\
HH 80/81 & $37.3$         & $46/63$      & $450/430$	           & $1.5$	   & $-$     & $515~000$    & $1700$ &  HM~& \citet{ptm04} \\
HH 168   & $78$           & $-$          & $30$		           & $6.5$	   & $-$     & $-$	   & $730$  &  HM~& \citet{ptu09}  \\
HH 210   & $838$          & $31$         & $10$	                   & $0.8$         & $-$     & $37~000$\tablefootmark{c}   & $450$  &  HM~& \citet{gfg06} \\
HH 540   & $795.8$        & $\approx$$200$ & $0.4$                   & $6.6$	   & $-$     & $<$$90$       & $450$  &  LM~& \citet{kfg05}\tablefootmark{a} \\
HH 216   & $78$           & $8$          & $10$    	           & $-$	   & $4$     & $-$	   & $2000$ &  --  & \citet{lgm07} \\
DG Tau   & $90$           & $18; 9$\tablefootmark{b}  & $0.12$   	           & $3.4$	   & $5$     & $30$        & $140$  &  LM~& \citet{gsa08} \\
Z CMa    & $39.6$         & $20$         & $>$$2.6$   	           & $2.3$	   & $-$     & $>$$ 2000$    & $1050$ &  HM~& \citet{sho09} \\
TKH 8    & $89.2$         & $28$         & $20$   	           & $35.4$        & $-$     & $450{-}900$   & $450$  &  LM~& \citet{tkk04}\tablefootmark{e} \\
\hline
\end{tabular} 
\tablefoot{$t_{\rm exp}$ is the exposure time of the observations (or the total exposure
time adding together several observations, as in the case of \object{DG Tau});
 cnts  are the collected photons; $L_{\rm X}$ is the \mbox{X-ray} luminosity
roughly in the $[0.3{-}10]$~keV band; $T_{\rm X}$ is the best fit
temperature; $L_{\rm j}$ is the linear size of the \mbox{X-ray} source; $z_{\rm
X}$ is the distance of the \mbox{X-ray} source from the central protostar;
$D$ is the distance of the HH object;  LM/HM  indicates the low-mass or high-mass
young stellar object from which the jet originates.\\
\tablefoottext{a}{Improved estimates of $L_{\rm X}$ and $T_{\rm X}$ from Joel Kastner and Ettore Flaccomio, private communication.}\\
\tablefoottext{b}{The first value is associated with the South-Western jet and the second with the North-Eastern jet in \object{DG Tau}.}\\
\tablefoottext{c}{Values derived from SIMBAD.}\\
\tablefoottext{d}{See also \citet{bfr03}.}\\
\tablefoottext{e}{See also \citet{tkh01}.}}
\end{table}