\begin{table}%t1
\caption{\label{tabella_eros}Properties of the \xray\ detected EROs.}
%\centerline
{\begin{tabular}{ccccccccccc}
\hline\hline 
ID   &    XID   &   XMM ID   &     RA	   &     Dec	  &   $R$   &  $K$   &  $R$--\ks\ &  $HR$  &  $F_{\rm 0.5-8~keV}$ & $z_{\rm phot}$      \\ [0.05cm]
     &          &            &   (deg)     &    (deg)     &  (mag)  &  (mag) &  (mag)    &      &     (\cgs)  & \\ \hline 
4012 &  12 &     273    & 222.185975   & 8.962944    &  24.63  & 18.61  &  6.02	& $-0.26\pm0.50$  & 4.00E-15 & 1.52	\\  [0.05cm]         
3690 &  20 &     344    & 222.230500   & 8.902914    &  23.36  & 17.81  &  5.55	& $0.35\pm0.41$	  & 4.19E-15 & 1.11	\\  [0.05cm] 	    
3629 &  23 &     195    & 222.237642   & 9.022706    &  24.11  & 18.33  &  5.78	& $0.10\pm0.15$	  & 1.53E-14 & 1.50	\\  [0.05cm]  % X/O>10 
3137 &  48 &            & 222.299196   & 9.002874    &  24.94  & 18.81  &  6.13	& $<$$-0.09$        & 1.00E-15 & 1.55	\\  [0.05cm] 	     
3009 &  51 &     239    & 222.309454   & 8.853264    &  23.96  & 18.24  &  5.72	& $-0.37\pm0.22$  & 1.73E-14 & 1.08	\\  [0.05cm]  % X/O>10 
2760 &  64 &     237    & 222.333292   & 8.986256    &  24.93  & 19.11  &  5.82	& $<$$-0.15$        & 1.35E-15 & 1.62	\\  [0.05cm]          
2663 &  69 &            & 222.344513   & 8.866972    &  25.15  & 19.13  &  6.02	&                 & 2.58E-15 &          \\  [0.05cm] 	     
2591 &  73 &     293    & 222.354121   & 8.941257    &  24.26  & 19.14  &  5.12	& $0.25\pm0.30$	  & 3.64E-15 & 1.69	\\  [0.05cm] 	     
2267 &  89 &     310    & 222.386204   & 8.872362    &  24.94  & 19.07  &  5.87	& $-0.18\pm0.49$  & 4.69E-15 & 1.81	\\  [0.05cm]  % X/O>10 
2160 &  93 &     209    & 222.396533   & 9.008494    &  23.27  & 18.09  &  5.18	& $-0.39\pm0.09$  & 2.83E-14 & 1.12$^{a}$\\ [0.05cm]  % X/O>10
2073 & 103 &     148    & 222.406892   & 9.055835    &  25.24  & 18.77  &  6.47	& $-0.35\pm0.09$  & 3.00E-14 & 2.53	\\  [0.05cm]  % X/O>10
1777 & 111 &     250    & 222.435442   & 8.979769    &  23.50  & 18.48  &  5.02	& $>$0.72         & 2.46E-15 & 1.65	\\  [0.05cm] 
1557 & 121 &            & 222.461171   & 9.084203    &  24.06  & 18.61  &  5.45	&                 & 1.66E-15 & 1.13 	\\  %[0.05cm] 
\cline{1-11} 
\multicolumn{11}{c}{ERO detected only in the hard band} \\ 
&&&&&&&&& $F_{\rm 2-10~keV}$ \\ [0.1cm]
3590 &      142 &            & 222.243017   & 9.051691    &  23.29  & 18.09  &  5.20    &                 & 3.76E-15 & 1.07   \\   [0.05cm]
\hline
\end{tabular}}
\par
\medskip
Notes. ID and XID indicate the optical/NIR and \xray\ identification number, respectively; 
XMM ID provides the association to the B05 catalog based on \xmm\ observations. 
Coordinates are referred to the position of the associated NIR counterpart. 
Sources detected in the FB only have no HR entry. $^{a}$ Tentative spectroscopic redshift based on the \mgii\ 2798~\AA\  emission line (see Sect.~\ref{daddi} for details). The photometric redshift for this source is $z_{\rm phot}=1.21$. Only one source (ID~=~2663) has no photometric redshift, because of the lack of IRAC coverage. 
\end{table}