\begin{table}%t1
%\centering
\par
\caption{Optical and X-ray properties of ULXs. 
1--2. main and alternative identification of the ULX candidates analyzed in this work 
(LM and LB stand for Liu \& Mirabel 2005 and Liu \& Bregman 2005, 
respectively); 
3--4. X-ray  RA (J2000) and Dec (2000) coordinates; 
5. Log of the Luminosity in the 2--10~keV band  (for object SW78 the quoted luminosity is in the 0.5--8 keV band)  assuming 
that the X-ray sources were at the distance of the parent galaxy; 
6--8. identification, morphological type and distance of the parent galaxy; 
9. difference
in arcsec  between X-ray and nominal optical  coordinates.\label{tab1}}
\begin{tabular}{lcccccccc}
\hline\hline
ID & Alternative ID & RA (J2000)  &  Dec. (J2000)  &  $L_X$  
&  ID Gal.  &  Type  &  $D$ &
  $\Delta$\\ 
 &  &  (hh:mm:ss.s)   & ($^\circ$:$^\prime$:$^{\prime \prime}$) &  (erg
 s$^{-1}$) &    & & (Mpc)  &  (arcsec)\\
 \hline
IXO~29 & (LM) ULX1 NGC~1961		     & 05:41:43.3 & +69:20:46	 & 40.5 & NGC~1961 & +5.0  &  52.40    &  0.9  \\
IXO~43 & (LM) NGC 4151, X1; (LB) NGC4151 X6& 12:10:07.9 & +39:23:12	 & 39.3 & NGC~4151 & +2.0  &  20.30    &  1.0  \\ 
IXO~54 & (LM) NGC4438 ULX1; (LB) NGC4438 X2& 12:27:57.5 & +13:02:30	 & 39.9 &
NGC~4438 & +0.0  &  16.80    &  5.2  \\ 
IXO~55 & (LM) NGC4472 ULX1				     & 12:29:13.1 & +07:57:40	 & 39.1 & NGC~4472 & $-$5.0  &  16.80    &  3.7  \\
IXO~56 & (LM) NGC4472 ULX2				     & 12:29:22.3 & +07:53:31	 & 39.4 & NGC~4472 & $-$5.0  &  16.80    &  2.7  \\
IXO~57 & (LM) NGC4472 ULX3; (LB) NGC4472 X5& 12:29:23.9 & +07:54:00	 & 39.8 & NGC~4472 & $-$5.0  &  16.80    &  2.7  \\
IXO~70 & (LM) NGC4649 ULX4 				     & 12:44:07.2 & +11:35:25	 & 39.3 & NGC~4649 & $-$5.0  &  14.85    &  3.5  \\
SW78   &				     & 12:25:17.17 & +18:13:46.7 & 39.4 & NGC~4382 &SA(s)0+pec& 14.40  &  0.1  \\
\hline
\end{tabular}
\end{table}