\begin{table}
%\centering
\par
\caption{Photometry and membership for the observed sample stars in the $\lambda$~Ori cluster.}\label{tab:star_lambda} 
\small \begin{tabular}{clcccccclrcclllll}
\hline \hline\noalign{\smallskip}
ID& Name$^{a}$& RA$^{b}$\ \ \ \ \ \  Dec$^{b}$& $I^{c}$& $R-I^{~c}$& Ref.$^{c}$& $J^{b}$& $H-K_{\rm s}^{b}$& SpT$^{d}$&\multicolumn{1}{c}{$v_{\rm r}$}& \multicolumn{1}{c}{$v~ \sin~(i)$}& \multicolumn{1}{c}{Li pEW$^{e}$}& \multicolumn{4}{c}{Membership}& Notes\\
&  & \multicolumn{1}{c}{(J2000)}& & & & & & & \multicolumn{1}{c}{(km~s$^{-1}$)}& \multicolumn{1}{c}{(km~s$^{-1}$)}& \multicolumn{1}{c}{(m\AA)}& $v_{\rm r}$& Li& H$\alpha$& \multicolumn{1}{c}{Tot}& \\
\hline
L01& LOri--003& 5 35 55.43 \  9 56 30.9& 12.65& 0.74& 2& 11.42& 0.21& K8.5 & \multicolumn{1}{c}{?}& & $520\pm32$ & ? & Y & Y & Y?& SB\\
L02& DM009   & 5 34 32.83 \  9 59 30.9& 12.94& 0.78& 1& 11.84& 0.17& K4.5 &  $27.09\pm0.26$      & 18.9$^{+2.7}_{-1.9}$ & $464\pm23$ & Y & Y & Y & Y &   \\
L03& LOri--016& 5 35 13.46 \  9 55 25.3& 13.18& 0.89& 2& 11.96& 0.23& K8.0    & \multicolumn{1}{c}{?}&                      & $531\pm33$ & ? & Y & Y & Y?& SB\\    
L04& DM014   & 5 34 39.21 \  9 52 55.3& 13.30& 1.06& 1& 12.07& 0.17& K7.0    &  $27.72\pm0.18$      &                           $<$17.0         &  $523\pm26$ & Y & Y & Y & Y &   \\   
L05& LOri--020& 5 34 57.57 \  9 46 07.2& 13.31& 1.34& 2& 11.86& 0.19& M2.0    &  $21.43\pm0.53$      &                      & $18\pm29$ & N & N & Y & N &   \\   
L06& LOri--022& 5 35 51.34 \  9 55 11.2& 13.38& 1.03& 2& 12.10& 0.25& M1.5    &  $28.40\pm0.38$      &      $<$17.0         & $516\pm33$ & Y & Y & Y & Y &   \\   
L07& LOri-024& 5 34 57.12 \  9 54 36.7& 13.45& 0.98& 2& 12.14& 0.23& M0.0    &  $27.28\pm0.29$      &      $<$17.0         & $554\pm21$ & Y & Y & Y & Y &   \\   
L08& LOri--026& 5 34 36.23 \  9 53 44.2& 13.47& 1.10& 2& 12.05& 0.23& K9.5    &  $27.29\pm0.43$      & 26.0$^{+6.0}_{-1.0}$ & $581\pm43$ & Y & Y & Y & Y &   \\   
L09& DM019   & 5 34 48.46 \  9 57 15.7& 13.73& 1.20& 1& 12.42& 0.18& M0.5    &  $27.47\pm0.28$      &      $<$17.0         & $571\pm27$ & Y & Y & Y & Y &   \\   
L10& LOri--030& 5 35 12.54 \  9 55 19.5& 13.74& 1.21& 2& 12.43& 0.26& M1.5    & \multicolumn{1}{c}{?}&                      & \multicolumn{1}{c}{Y}& ? & Y & Y & Y? & SB2\\    
L11& LOri--034& 5 35 19.92 \ 10 02 36.5& 13.97& 1.13& 2& 12.44& 0.46& M1.0    &  $24.36\pm0.30$      &      $<$17.0         & $541\pm35$ & N & Y & Y & Y?&   \\     
L12& LOri-035& 5 35 15.14 \ 10 01 06.8& 13.97& 1.28& 2& 12.55& 0.23& M2.5    &  $21.36\pm0.72$      & 30.2$^{+10.0}_{-6.2}$& $572\pm21$ & N & Y & Y & Y?&   \\   
L13& LOri--036& 5 34 39.29 \ 10 01 28.7& 13.98& 1.49& 2& 12.58& 0.23& M3.0    &  $24.63\pm0.38$      &                      & $56\pm22$ & N & N & Y & N &   \\   
L14& LOri--037& 5 34 35.61 \  9 59 43.3& 13.99& 1.18& 2& 12.46& 0.24& M2.0    &  $27.13\pm0.33$      &      $<$17.0         & $566\pm57$ & Y & Y & Y & Y &   \\
L15& LOri--040& 5 35 39.48 \  9 50 32.8& 14.06& 1.32& 2& 12.55& 0.29& M3.0    &  $26.95\pm0.46$      &      $<$21.3         & $561\pm45$ & Y & Y & Y & Y &   \\   
L16& LOri--041& 5 35 30.45 \  9 50 34.1& 14.10& 1.45& 2& 12.50& 0.27& M3.5    &  $27.05\pm0.71$      & $\rm 61.9^{+11.8}_{-5.7}$& $485\pm40$ & Y & Y & Y & Y &   \\   
L17& DM030   & 5 35 17.17 \  9 51 11.4& 14.13& 1.46& 1& 12.80& 0.22& M1.0    &  $27.30\pm0.27$      &      $<$17.0         & $571\pm34$ & Y & Y & Y & Y &   \\   
L18& LOri--045& 5 35 07.42 \  9 58 22.4& 14.23& 1.33& 2& 12.77& 0.26& M2.0    &  $26.89\pm0.42$      &      $<$17.0         & $554\pm23$ & Y & Y & Y & Y &   \\   
L19& LOri--046& 5 34 26.08 \  9 51 49.4& 14.36& 1.28& 2& 13.03& 0.23& M2.0    & $-0.28\pm0.43$     &                      & $148\pm64$ & N & N & N & N &   \\    
L20& LOri--048& 5 35 12.56 \  9 53 11.1& 14.41& 1.37& 2& 12.89& 0.27& M2.5    &  $27.04\pm0.44$      &      $<$17.0         & $545\pm12$ & Y & Y & Y & Y &   \\   
L21& LOri-049& 5 35 01.00 \  9 49 36.1& 14.50& 1.27& 2& 13.17& 0.34& M2.0    &  $24.06\pm0.36$      &                       & $64\pm13$ & N & N & N & N &   \\   
L22& LOri--050& 5 34 56.40 \  9 55 04.6& 14.54& 1.36& 2& 12.88& 0.29& M2.5    & \multicolumn{1}{c}{?}&                       & $596\pm58$ & ? & Y & Y & Y?& SB\\    
L23& DM032   & 5 35 18.38 \ 10 02 38.4& 14.69& 1.56& 1& 13.07& 0.26& M1.5    &  $26.98\pm0.34$      &       $<$17.0         & $589\pm16$ & Y & Y & Y & Y &   \\   
L24& LOri--053& 5 34 36.73 \  9 52 58.3& 14.72& 1.36& 2& 13.17& 0.24& M2.5    &  $27.00\pm0.42$      &     $<$18.3           & $561\pm30$ & Y & Y & Y & Y &   \\   
L25& LOri--055& 5 35 21.43 \  9 49 56.6& 14.76& 1.36& 2& 13.18& 0.23& M2.5    &  $26.70\pm0.39$      &      $<$17.0          & $602\pm33$ & Y & Y & Y & Y &   \\   
L26& LOri--056& 5 34 58.37 \  9 53 47.1& 14.87& 1.56& 2& 13.21& 0.30& M3.0    &  $26.84\pm0.56$      &      $<$19.3         & $576\pm23$ & Y & Y & Y & Y &   \\   
L27& LOri--057& 5 35 11.32 \ 10 00 50.2& 15.04& 1.59& 2& 13.41& 0.28& M3.5    &  $26.99\pm0.49$      &      $<$17.0         & $677\pm19$ & Y & Y & Y & Y &   \\   
L28& LOri--060& 5 35 20.00 \  9 49 06.2& 15.14& 1.42& 2& 13.60& 0.30& M2.5    &  $27.22\pm0.45$      &      $<$18.5         & $599\pm28$ & Y & Y & Y & Y &   \\   
L29& LOri--061& 5 35 18.18 \  9 52 24.2& 15.15& 1.43& 2& 13.53& 0.31& M2.5    &  $26.80\pm0.47$      & 17.9$^{+1.4}_{-1.8}$ & $591\pm30$ & Y & Y & Y & Y &   \\   
L30& LOri--062& 5 35 15.33 \  9 48 37.0& 15.16& 1.46& 2& 13.63& 0.28& M3.0    &  $26.80\pm0.47$      &      $<$17.0         & $648\pm48$ & Y & Y & Y & Y &   \\   
L31& LOri--068& 5 34 48.02 \  9 43 26.2& 15.20& 1.56& 2& 13.52& 0.27& M3.0    &  $29.37\pm0.47$      &      $<$17.0         & $698\pm25$ & N & Y & Y & Y?&   \\   
L32& LOri--069& 5 34 43.97 \  9 48 35.6& 15.20& 1.69& 2& 13.38& 0.34& M3.5    & \multicolumn{1}{c}{?}&                      & $516\pm57$ & ? & Y & Y & Y?& SB\\
L33& LOri--075& 5 34 55.22 \ 10 00 34.7& 15.23& 1.72& 2& 13.40& 0.26& M5.0$^*$&  $26.02\pm0.82$      & 61.3$^{+11.5}_{-4.9}$& $455\pm44$ & Y & Y & Y & Y &   \\
L34& LOri--063& 5 35 19.14 \  9 54 42.4& 15.34& 1.46& 2& 13.76& 0.41& M3.0    &  $27.19\pm0.47$      &      $<$18.2         & $505\pm52$ & Y & Y & Y & Y &   \\   
L35& LOri--076& 5 35 10.96 \  9 57 43.8& 15.81& 1.58& 2& 14.22& 0.33& M3.0    &  $27.52\pm0.50$      &      $<$17.0         & $608\pm19$ & Y & Y & Y & Y &   \\   
L36& LOri-079& 5 34 48.26 \  9 59 53.9& 16.00& 1.51& 2& 14.22& 0.20& M3.0    &  $27.03\pm0.51$      &      $<$17.0         & $607\pm59$ & Y & Y & Y & Y &   \\   
L37& LOri--080& 5 35 30.05 \  9 59 25.5& 16.01& 1.50& 2& 13.80& 0.31& M3.0    &  $25.74\pm0.81$      &60.2$^{+21.3}_{-5.9}$ & $523\pm20$ & Y & Y & Y & Y &   \\   
L38& LOri--083& 5 35 43.41 \  9 54 26.8& 16.02& 1.54& 2& 14.27& 0.26& M3.0    &  $26.32\pm0.57$      &19.1$^{+7.9}_{-2.6}$  & $585\pm77$ & Y & Y & Y & Y &   \\   
L39& LOri--087& 5 34 33.77 \  9 55 34.2& 16.09& 1.45& 2& 14.19& 0.32& M4.5$^*$&  $27.25\pm0.57$      &18.4$^{+6.0}_{-1.7}$  & $609\pm42$ & Y & Y & Y & Y &   \\
L40& LOri--088& 5 34 49.50 \  9 58 46.8& 16.10& 1.68& 2& 14.14& 0.31& M3.5    &  $26.75\pm0.53$      &      $<$17.0         &  $660\pm42$ & Y & Y & Y & Y &   \\   
L41& LOri--092& 5 35 50.97 \  9 51 03.5& 16.19& 1.65& 2& 14.44& 0.30& M3.5    &  $26.66\pm0.57$      & 19.8$^{+2.8}_{-2.6}$ & $661\pm53$ & Y & Y & Y & Y &   \\   
L42& LOri--093& 5 34 41.20 \  9 50 16.3& 16.21& 1.61& 2& 14.46& 0.24& M3.5    &  $27.00\pm0.56$      &      $<$18.3         & $623\pm61$ & Y & Y & Y & Y &   \\   
L43& LOri--094& 5 34 43.17 \ 10 01 59.8& 16.28& 1.75& 2& 14.40& 0.37& M4.0    &  $26.36\pm0.80$      & 54.8$^{+5.5}_{-8.2}$ & $538\pm204$& Y & Y & Y & Y &   \\   
L44& LOri--095& 5 35 24.18 \  9 55 15.4& 16.35& 1.61& 2& 14.56& 0.30& M6.0$^*$&  $27.31\pm0.55$      &      $<$19.7         & $559\pm30$ & Y & Y & Y & Y &   \\
L45& LOri--096& 5 35 11.13 \  9 57 19.6& 16.37& 1.65& 2& 14.63& 0.33& M3.5    &  $26.92\pm0.55$      &      $<$19.1         & $553\pm48$ & Y & Y & Y & Y &   \\   
L46& LOri--100& 5 35 00.10 \  9 46 14.0& 16.43& 1.65& 2& 14.77& 0.22& M3.5    &  $28.04\pm0.46$      &      $<$17.0         & $717\pm43$ & Y & Y & Y & Y &   \\   
L47& LOri--102& 5 35 22.02 \  9 52 52.3& 16.50& 1.74& 2& 14.63& 0.27& M4.0    &  $28.10\pm0.53$      &      $<$17.0         & $584\pm62$ & Y & Y & Y & Y &   \\ 
\hline
L48& LOri--105& 5 34 17.58 \  9 52 29.7& 16.75& 1.83& 2& 14.92& 0.35& M4.0    &  $26.45\pm0.70$      &      $<$20.0         & \multicolumn{1}{c}{Y}& Y & Y & Y & Y & \\   
L49& LOri--106& 5 35 28.77 \  9 54 10.2& 16.76& 1.72& 2& 14.78& 0.42& M4.0    &  $26.83\pm0.54$      &      $<$17.0         & $636\pm132$& Y & Y & Y & Y &   \\
\hline  
\end{tabular}
\medskip
$^a$~Star names are from the following sources: DM~$=$~~\cite{Dolan1999AJ}; LOri $=$ \cite{Barrado2004ApJ}; $^b$~coordinates and infrared photometry are from the 2MASS~catalogue; $^c$~optical photometric data are taken from: (1) \cite{Dolan1999AJ}, (2) \cite{Barrado2004ApJ}; $^d$~spectral types marked with asterisk have been derived spectroscopically by \cite{Barrado2004ApJ}. The other spectral types have been derived from photometry (see Sect.~\ref{par:T_selection}); $^e$~for the double-lined spectroscopic binary L10 and for the star L48, we only indicate whether the line is identified (Y) or not (N).
\end{table}