\begin{table}%ta2 \caption{\label{table.xmmnewton}Optical/near-infrared counterparts of EPIC/{\em XMM-Newton} sources in Franciosini et~al. (2006) not listed in Tables~\ref{table.beyond} or~\ref{table.xraydetections}.} %%\centerline \par {\small \begin{tabular}{l cc c ll} \hline \hline \noalign{\smallskip} NX & $\alpha$ & $\delta$ & {\it CR} & Name & Class \\ (Fr06) & (J2000) & (J2000) & [ks$^{-1}$] & & \\ \noalign{\smallskip} \hline \noalign{\smallskip} 4 & 05 38 00.56 & --02 45 09.7 & $9.7\pm1.0$ & Mayrit 861230 & Possible young star \\ % 6 & 05 38 06.50 & --02 28 49.4 & $0.67\pm0.18$ & Mayrit 717307 & Young star \\ % 7 & 05 38 06.74 & --02 30 22.8 & $19.0\pm0.9$ & Mayrit 662301 & Young star \\ % Bright X-ray stars absent in our work: NX~7 (Mayrit~662301, Kiso A-0904~67). 11 & 05 38 13.20 & --02 26 08.8 & $1.6\pm0.3$ & Mayrit 757321 & Young star \\ % 14 & 05 38 15.53 & --02 42 05.1 & $2.7\pm0.4$ & [FPS2006] NX 14 & Possible galaxy \\ % NX 41 in LC2008, blue i-Ks, unknown 17 & 05 38 17.78 & --02 40 50.1 & $0.97\pm0.17$ & Mayrit 498234 & Young star \\ % 25 & 05 38 23.32 & --02 44 14.2 & $0.85\pm0.17$ & Mayrit 589213 & Young star \\ % 26 & 05 38 23.55 & --02 41 31.8 & $0.96\pm0.19$ & Mayrit 459224 & Young star \\ % 33 & 05 38 27.51 & --02 35 04.2 & $1.5\pm0.4$ & Mayrit 265282 & Young star \\ % In the innermost 5~arcmin: NX~33 (Kiso A-0976 329, S~Ori~J053827.5--023504). 42 & 05 38 30.98 & --02 34 03.8 & $0.64\pm0.13$ & [FPS2006] NX 42 & Possible field star \\ % Prob. fore. star? 47 & 05 38 32.68 & --02 31 15.6 & $0.57\pm0.13$ & [KJN2005] 3.01 325 & Field star \\ % Non-member in Sacco et~al. 2008 50 & 05 38 33.02 & --02 39 27.9 & $0.53\pm0.11$ & [FPS2006] NX 50 & Possible field star? \\ % New candidate member? 67 & 05 38 39.13 & --02 28 00.4 & $1.3\pm0.2$ & Mayrit 487350 & Young brown dwarf \\ % Interesting: [SE2004]~70 + S~Ori~68. 82 & 05 38 45.98 & --02 45 23.2 & $0.73\pm0.18$ & Mayrit 563178 & Possible young star \\ % 89 & 05 38 47.66 & --02 30 37.4 & $2.2\pm0.5$ & Mayrit 326008 & Young star \\ % 97$^{a}$ & 05 38 49.93 & --02 41 22.8 & $1.08\pm0.15$ & Mayrit 332167 & Young star \\ % 100 & 05 38 50.39 & --02 26 47.7 & $1.0\pm0.2$ & Mayrit 559009 & Young star \\ % 101 & 05 38 51.01 & --02 27 45.7 & $0.70\pm0.17$ & [KJN2005] 1.02 156 AB & Field star \\ % SB, non-member in Sacco et~al. 2008 111 & 05 38 54.92 & --02 28 58.3 & $0.69\pm0.16$ & Mayrit 449020 & Young star \\ % 114 & 05 38 56.99 & --02 31 25.6 & $0.65\pm0.13$ & SO110979 & Field star \\ % 116 & 05 38 58.84 & --02 34 13.2 & $0.63\pm0.13$ & [D90] 3 & Radiogalaxy \\ % 118 & 05 38 59.23 & --02 33 51.4 & $0.25\pm0.07$ & Mayrit 252059 & Young star \\ % In the innermost 5~arcmin: NX~118 (Haro 5-18, SWW~227). 147 & 05 39 12.32 & --02 30 06.4 & $2.1\pm0.4$ & Mayrit 544049 & Possible young star \\ % 149 & 05 39 14.47 & --02 28 33.4 & $10.9\pm0.6$ & Mayrit 631045 & Possible young star \\ % Bright X-ray stars absent in our work: NX~149 (Mayrit~631045, S~Ori~J053914.5--022834). 157 & 05 39 18.97 & --02 30 55.6 & $3.0\pm0.4$ & Mayrit 596059 & Young star? \\ % 160 & 05 39 20.97 & --02 30 33.5 & $5.8\pm0.5$ & Mayrit 633059 & Young star \\ % Moderately bright: NX~160 (Mayrit~633059, S~Ori~3). 167 & 05 39 26.73 & --02 26 17.4 & $2.9\pm0.6$ & Mayrit 856047 & Young star \\ % 169 & 05 39 50.56 & --02 38 27.0 & $1.8\pm0.3$ & [SWW2004] 222 AB & Field star \\ % % NX 169; SB and no member in Sa08; [SWW2004] J053930.567-023826.96 174 & 05 39 39.83 & --02 33 16.0 & $19.8\pm1.0$ & Mayrit 841079 & Young star \\ % Bright X-ray stars absent in our work: NX~174 (Mayrit~841079, V603~Ori, source of Herbig-Haro object HH~445). 175 & 05 39 39.99 & --02 43 09.7 & $1.9\pm0.5$ & Mayrit 931117 & Young star \\ % \noalign{\smallskip} \hline \end{tabular}} \tablefoot{\tablefoottext{a}{Star NX~97 (\object{Mayrit~332167}, [SWW2004]~200) has colours, lithium, radial velocity, and H$\alpha$ emission consistent with membership in cluster (Sacco et~al. 2008). Its Mayrit number is first given here.}} \end{table}