\begin{table}%t4
\par
\caption {\label{tab_phot}Optical and near-IR photometry for the IC~2391 members and candidates of IC~2391 discussed in this work.
The objects with identification number~(ID) from~1 to~29 are the new candidates selected in this work (Sect.~\ref{selection}); 
three of these candidates show IR~excess emission at 24~$\mu$m and are marked by an asterisk. 
The objects with ID from~30 to~37 are the additional 8~cluster members and candidates showing IR 
excess emission discussed in Sect.~\ref{sec_debris}.}
%\centerline
 {
\begin{tabular}{cllcccccccccc}  
\hline\hline
ID    & Designation &  Status$^\wedge$ & Ref.$^{\bullet}$ & RA$_{J2000} ^{\dag}$ & Dec$_{J2000} ^{\dag}$ & $B^{\diamond}$ & $V^{\dag}$ & $R_{\rm c} ^{\dag}$ & $I_{\rm c} ^{\dag}$ & $J^{\ddag}$ & $H^{\ddag}$ & $K_{\rm S} ^{\ddag}$\\
      &             &   	       &		  & (hh:mm:ss)  	   &  (dd:mm:ss)	    &	  &	&  &  &  &  & \\
\noalign{\medskip}
\hline
\noalign{\medskip}
1  & WFI~J08403964-5250429*	    & HR-C      &    & 08:40:39.643 & $-$52:50:42.86 &  --   & 21.24~$\pm$~0.09  & 19.82~$\pm$~0.05 & 17.83~$\pm$~0.07 & 15.54~$\pm$~0.05 & 14.86~$\pm$~0.08 & 14.52~$\pm$~0.09 \\
2  & WFI~J08404512-5248521 	    & HR-C, PM-C &    & 08:40:45.118 & $-$52:48:52.09 & 17.10 & 16.60~$\pm$~0.07  & 15.39~$\pm$~0.03 & 13.97~$\pm$~0.04 & 12.23~$\pm$~0.02 & 11.65~$\pm$~0.02 & 11.42~$\pm$~0.02 \\
3  & WFI~J08404578-5301052 	    & HR-C      &    & 08:40:45.780 & $-$53:01:05.23 &  --   & 14.50~$\pm$~0.07  & 13.36~$\pm$~0.03 & 12.63~$\pm$~0.04 & 11.24~$\pm$~0.03 & 10.43~$\pm$~0.04 & 10.19~$\pm$~0.05 \\
4  & WFI~J08405518-5257227	    & HR-C      &    & 08:40:55.176 & $-$52:57:22.68 & 15.52 & 14.59~$\pm$~0.07  & 13.39~$\pm$~0.03 & 12.58~$\pm$~0.04 & 10.94~$\pm$~0.03 & 10.10~$\pm$~0.03 &  9.84~$\pm$~0.02 \\
5  & WFI~J08410806-5300053$^{\rm OD}$   & HR-C, X    & a  & 08:41:08.057 & $-$53:00:05.26 &  --   & 18.02~$\pm$~0.08  & 16.82~$\pm$~0.06 & 15.27~$\pm$~0.06 & 13.28~$\pm$~0.03 & 12.67~$\pm$~0.06 & 12.45~$\pm$~0.05 \\					
6  & WFI~J08410814-5255027 	    & HR-C, PM-C &    & 08:41:08.141 & $-$52:55:02.71 & 14.30 & 14.69~$\pm$~0.07  & 13.45~$\pm$~0.03 & 12.64~$\pm$~0.04 & 10.98~$\pm$~0.04 & 10.08~$\pm$~0.04 &  9.81~$\pm$~0.03 \\
7  & WFI~J08410886-5248387*	    & HR-C, X    &    & 08:41:08.856 & $-$52:48:38.74 & 18.77 & 18.74~$\pm$~0.07  & 17.46~$\pm$~0.04 & 15.66~$\pm$~0.06 & 13.52~$\pm$~0.03 & 12.90~$\pm$~0.02 & 12.65~$\pm$~0.03 \\
8  & WFI~J08410937-5302136 	    & HR-C, X    &    & 08:41:09.374 & $-$53:02:13.60 & 17.51 & 17.58~$\pm$~0.07  & 16.38~$\pm$~0.04 & 14.74~$\pm$~0.05 & 12.73~$\pm$~0.03 & 12.11~$\pm$~0.03 & 11.91~$\pm$~0.03 \\
9  & WFI~J08411865-5258549$^{\rm OD}$   & HR-C, X    & a  & 08:41:18.650 & $-$52:58:54.88 & 19.61 & 18.83~$\pm$~0.07  & 17.64~$\pm$~0.03 & 16.12~$\pm$~0.05 & 14.14~$\pm$~0.03 & 13.58~$\pm$~0.03 & 13.23~$\pm$~0.04 \\
10 & WFI~J08412229-5304471 	    & HR-C, X    &    & 08:41:22.291 & $-$53:04:47.14 & 17.77 & 17.16~$\pm$~0.07  & 15.98~$\pm$~0.03 & 14.43~$\pm$~0.05 & 12.47~$\pm$~0.02 & 11.85~$\pm$~0.02 & 11.58~$\pm$~0.02 \\
11 & WFI~J08413933-5252565 	    & HR-C      &    & 08:41:39.326 & $-$52:52:56.53 & 15.76 & 14.93~$\pm$~0.07  & 13.81~$\pm$~0.03 & 13.09~$\pm$~0.04 & 11.60~$\pm$~0.02 & 10.85~$\pm$~0.03 & 10.65~$\pm$~0.02 \\
12 & WFI~J08415360-5257558 	    & HR-C, X    &    & 08:41:53.602 & $-$52:57:55.80 & 18.12 & 17.44~$\pm$~0.07  & 16.24~$\pm$~0.03 & 14.72~$\pm$~0.05 & 12.79~$\pm$~0.03 & 12.17~$\pm$~0.02 & 11.93~$\pm$~0.03 \\
13 & WFI~J08422460-5259575 	    & HR-C, PM-C &    & 08:42:24.605 & $-$52:59:57.48 & 13.71 & 12.71~$\pm$~0.05  & 11.91~$\pm$~0.04 & 11.48~$\pm$~0.05 & 10.54~$\pm$~0.03 & 10.05~$\pm$~0.03 &  9.92~$\pm$~0.02 \\
14 & WFI~J08423071-5257348 	    & HR-C, PM-C,X&   & 08:42:30.715 & $-$52:57:34.78 & 14.95 & 14.63~$\pm$~0.07  & 13.49~$\pm$~0.03 & 12.73~$\pm$~0.04 & 11.39~$\pm$~0.02 & 10.71~$\pm$~0.02 & 10.52~$\pm$~0.02 \\
15 & WFI~J08424731-5309235 	    & HR-C, X    &    & 08:42:47.314 & $-$53:09:23.54 & 17.80 & 20.36~$\pm$~0.08  & 18.91~$\pm$~0.05 & 16.79~$\pm$~0.07 & 14.20~$\pm$~0.05 & 13.64~$\pm$~0.05 & 13.24~$\pm$~0.04 \\
16 & WFI~J08424850-5303187 	    & HR-C, X    &    & 08:42:48.502 & $-$53:03:18.72 & 19.07 & 18.55~$\pm$~0.07  & 17.26~$\pm$~0.04 & 15.63~$\pm$~0.05 & 13.59~$\pm$~0.02 & 12.99~$\pm$~0.02 & 12.68~$\pm$~0.03 \\
17 & WFI~J08425873-5305546 	    & HR-C, PM-C, X&   & 08:42:58.733 & $-$53:05:54.64 & 17.56 & 16.55~$\pm$~0.07  & 15.33~$\pm$~0.03 & 13.87~$\pm$~0.04 & 12.01~$\pm$~0.02 & 11.38~$\pm$~0.02 & 11.13~$\pm$~0.02 \\
18 & WFI~J08425988-5305074 	    & HR-C      &    & 08:42:59.880 & $-$53:05:07.44 &  --   & 20.65~$\pm$~0.08  & 19.19~$\pm$~0.05 & 17.17~$\pm$~0.07 & 14.77~$\pm$~0.04 & 14.16~$\pm$~0.04 & 13.81~$\pm$~0.06 \\
19 & WFI~J08430294-5302259 	    & HR-C      &    & 08:43:02.938 & $-$53:02:25.91 & 15.07 & 13.97~$\pm$~0.07  & 12.87~$\pm$~0.03 & 12.10~$\pm$~0.04 & 10.60~$\pm$~0.02 &  9.79~$\pm$~0.02 &  9.59~$\pm$~0.02 \\
20 & WFI~J08431228-5251411	    & HR-C      &    & 08:43:12.283 & $-$52:51:41.11 &  --   & 22.85~$\pm$~0.10  & 21.32~$\pm$~0.07 & 18.92~$\pm$~0.09 & 16.18~$\pm$~0.09 & 15.53~$\pm$~0.13 & 15.45$^{UL}$   \\
21 & WFI~J08431860-5306241 	    & HR-C,PM-C &    & 08:43:18.602 & $-$53:06:24.12 & 13.97 & 13.41~$\pm$~0.06  & 12.43~$\pm$~0.03 & 11.80~$\pm$~0.04 & 10.52~$\pm$~0.02 &  9.83~$\pm$~0.02 &  9.67~$\pm$~0.02 \\
22 & WFI~J08433366-5259549 	    & HR-C      &    & 08:43:33.658 & $-$52:59:54.89 &  --   & 22.71~$\pm$~0.12  & 20.88~$\pm$~0.07 & 18.55~$\pm$~0.08 & 15.80~$\pm$~0.08 & 15.05~$\pm$~0.09 & 14.75~$\pm$~0.11 \\
23 & WFI~J08433843-5246379 	    & HR-C      &    & 08:43:38.431 & $-$52:46:37.92 & 18.09 & 16.96~$\pm$~0.08  & 15.49~$\pm$~0.03 & 14.36~$\pm$~0.04 & 12.38~$\pm$~0.02 & 11.36~$\pm$~0.02 & 11.06~$\pm$~0.02 \\
24 & WFI~J08433939-5307563$^{\rm OD}$   & HR-C      & b  & 08:43:39.389 & $-$53:07:56.32 & 18.38 & 18.08~$\pm$~0.07  & 16.87~$\pm$~0.04 & 15.20~$\pm$~0.05 & 13.14~$\pm$~0.02 & 12.54~$\pm$~0.03 & 12.28~$\pm$~0.02 \\
25 & WFI~J08433945-5248576 	    & HR-C      &    & 08:43:39.451 & $-$52:48:57.56 & 19.74 & 18.79~$\pm$~0.07  & 17.60~$\pm$~0.03 & 16.16~$\pm$~0.04 & 14.38~$\pm$~0.03 & 13.76~$\pm$~0.03 & 13.46~$\pm$~0.05 \\
26 & WFI~J08434640-5257036 	    & HR-C, PM-C &    & 08:43:46.399 & $-$52:57:03.56 & 14.48 & 13.73~$\pm$~0.06  & 12.77~$\pm$~0.03 & 12.12~$\pm$~0.04 & 10.86~$\pm$~0.03 & 10.23$^{UL}$	& 10.01$^{UL}$   \\
27 & WFI~J08434751-5250136 	    & HR-C, PM-C &    & 08:43:47.508 & $-$52:50:13.63 & 16.01 & 15.92~$\pm$~0.07  & 14.59~$\pm$~0.03 & 13.64~$\pm$~0.03 & 11.88~$\pm$~0.02 & 10.91~$\pm$~0.02 & 10.65~$\pm$~0.02 \\
28 & WFI~J08434909-5307269 	    & HR-C      &    & 08:43:49.090 & $-$53:07:26.94 & 19.51 & 18.64~$\pm$~0.07  & 17.48~$\pm$~0.03 & 16.00~$\pm$~0.04 & 14.13~$\pm$~0.03 & 13.55~$\pm$~0.03 & 13.28~$\pm$~0.04 \\
29 & WFI~J08440199-5310356 	    & HR-C, PM-C &    & 08:44:01.992 & $-$53:10:35.62 & 15.20 & 14.95~$\pm$~0.06  & 13.94~$\pm$~0.03 & 13.24~$\pm$~0.04 & 11.65~$\pm$~0.04 & 11.09~$\pm$~0.05 & 10.69~$\pm$~0.03 \\
\hline
30 & WFI~J08404683-5302487*$^{\rm OD}$  & M      & c  & 08:40:46.826 & $-$53:02:48.73  &  --   & 19.25~$\pm$~0.06 & 18.36~$\pm$~0.03 & 17.80~$\pm$~0.04 & 16.53~$\pm$~0.21 & 15.81~$\pm$~0.28 & 15.95$^{UL}$     \\
31 & WFI~J08410019-5249088*         & IR-C   &    & 08:41:00.190 & $-$52:49:08.76  & 17.53 & 16.71~$\pm$~0.07 & 15.60~$\pm$~0.03 & 14.92~$\pm$~0.04 & 13.51~$\pm$~0.03 & 12.77~$\pm$~0.03 & 12.56~$\pm$~0.03  \\
32 & WFI~J08412176-5247289*$^{\rm OD}$  & M      & c  & 08:41:21.756 & $-$52:47:28.90  & 20.10 & 19.33~$\pm$~0.06 & 18.24~$\pm$~0.03 & 17.65~$\pm$~0.04 & 16.43~$\pm$~0.11 & 15.60~$\pm$~0.14 & 15.25$^{UL}$     \\
33 & WFI~J08412550-5300154*         & IR-C   &    & 08:41:25.502 & $-$53:00:15.44  &  --   & 18.73~$\pm$~0.05 & 17.92~$\pm$~0.04 & 17.49~$\pm$~0.05 & 16.35~$\pm$~0.11 &  --	     & 15.60$^{UL}$	\\
34 & WFI~J08413601-5309274*$^{\rm OD}$  & M      &d,e & 08:41:36.010 & $-$53:09:27.40  & 19.37 & 18.52~$\pm$~0.07 & 17.27~$\pm$~0.04 & 15.56~$\pm$~0.05 & 13.43~$\pm$~0.02 & 12.89~$\pm$~0.03 & 12.61~$\pm$~0.03  \\
35 & WFI~J08413888-5259492*         & IR-C   &    & 08:41:38.885 & $-$52:59:49.24  & 17.22 & 17.20~$\pm$~0.06 & 16.30~$\pm$~0.03 & 15.73~$\pm$~0.04 & 14.56~$\pm$~0.02 & 14.16~$\pm$~0.03 & 13.95~$\pm$~0.06  \\
36 & WFI~J08414904-5255192*         & IR-C   &    & 08:41:49.039 & $-$52:55:19.20  & 19.56 & 18.52~$\pm$~0.06 & 17.46~$\pm$~0.03 & 16.77~$\pm$~0.04 & 15.19~$\pm$~0.05 & 14.61~$\pm$~0.06 & 14.47~$\pm$~0.10  \\
37 & WFI~J08415780-5252140*$^{\rm OD}$  & M      & f  & 08:41:57.799 & $-$52:52:13.98  & 14.74 & 13.76~$\pm$~0.06 & 12.74~$\pm$~0.03 & 12.16~$\pm$~0.04 & 11.09~$\pm$~0.02 & 10.40~$\pm$~0.02 & 10.27~$\pm$~0.02  \\
\hline               						        
\end{tabular}}
\par
\smallskip
\par
$^\wedge$ {M = confirmed cluster member; HR-C = member candidate according to the location on the HR diagram; 
PM-C = proper motion member candidate; X = X-ray sources \citep{Mar05}.; 
IR-C: young stellar object candidate according to the IR properties (Sect.~\ref{sel_debris}).}\\
$^\bullet$ {a) \citet{Rol97}; b) \citet{Pat99}; c) \citet{Dod04}; d) \citet{Bar01b}; e) \citet{Mar05}; f) \citet{Sie07} and references therein.}\\
$^\dag$ {From the WFI survey presented in this work.}\\
$^\diamond$ {From the NOMAD catalog \citep{Zac05}. 
Photometric uncertainties are approximately 0.2--0.3~mag.}\\
$^\ddag$ {From the 2MASS catalog \citep{Cut03}.}\\
$^{*}$ {Object showing IR excess emission at 24~$\mu$m.}\\
$^{\rm UL}$ {Flux upper limit.}\\
$^{\rm OD}$ {Other Designation. ID~5: RB729, ID~9: RB955, 2MASSJ08411862-5258546. ID~24: PP9, 2MASSJ08433935-5307556. 
ID~30: D97, 2MASS~J08404679-5302481. ID~32: D112, 2MASSJ08412176-5247291. ID~34: CTIO100, 2MASSJ08413595-5309268. 
ID~37: V368Vel, SMY29, PMM4636, GSC08569-01100, VXRPSPC41, SHJM9, VXRHRI19, \#29.}\\
\par
\end{table}