\begin{table}%t8 \caption{\label{table.ctts}Intermediate- and low-mass X-ray stars in $\sigma$~Orionis with colours $J-K_{\rm s} >$ 1.15~mag\tablefootmark{a}.} %%\centerline \par {\small \begin{tabular}{lcc c ccccc} \hline \hline \noalign{\smallskip} No. & Name & Alternative & $J-K_{\rm s}$ & Sp. & $pEW$(Li {\sc i}) & $pEW$(H$\alpha$) & SED & Phot. \\ & & name & [mag] & type & [m\AA] & [\AA] & class & variable \\ \noalign{\smallskip} \hline \noalign{\smallskip} 29 & Mayrit~92149~AB & [W96] rJ053847--0237 & $1.24\pm0.06$ & M1.0: & $481\pm8$ & $-20.9\pm1.2$ & II & no \\ % M1.0:, [Li I (Sa08), Halpha, II, X], Wo96,Fr06,He07 36 & Mayrit~203283 & [W96] rJ053831--0235 & $1.16\pm0.04$ & M0.0: & $479\pm6$ & $-10.2\pm0.9$ & II & no \\ % M0.0:, [Li I (Sa08), Halpha, II, X], Wo96,ZO02a,Fr06,He07 45 & Mayrit~609206 & V505 Ori & $2.01\pm0.04$ & K7.0 & $431\pm11$ & $-25.1\pm0.7$ & II & yes \\ % K7.0, [Li I (Sa08), Halpha, Em, mIR, X], HM53,Wi89,ZO02a,OvL04 61 & Mayrit~30241 & [HHM2007] 687 & $1.28\pm0.05$ & ... & ... & ... & II & no \\ % [X, Ks excess], Ca07b 72 & Mayrit~521199 & TX Ori & $1.46\pm0.04$ & K4 & ... & --16.6 & II & yes \\ % K4 [Halpha, Ca II, mIR, X, Si], HM53,HR72,OvL04,He07 75 & Mayrit~622103 & BG Ori & $1.30\pm0.04$ & M0.5: & $480\pm7$ & $-40\pm3$ & II & yes \\ % M0.5:, [Li I (Sa08), Halpha, II, X], HM53,Ca06,Fr06,He07 79 & Mayrit~203260 & Haro 5--11 & $1.19\pm0.04$ & M2.0: & $342\pm2$ & $-198\pm12$ & II & no \\ % M2.0:, [Li I (Sa08), Halpha, II], Wi89,WB04,Ca06,He07 80 & Mayrit~497054 & V509 Ori & $1.26\pm0.03$ & M0.5: & $263\pm4$ & $-25.8\pm0.8$ & II & yes \\ % M0.5:, [Li I (Sa08), Halpha, II, X]. Wi89,Ca06,Fr06,He07 \hline \end{tabular}} \tablefoot{\tablefoottext{a}{Spectral types and Li~{\sc i} and H$\alpha$ pseudo-equivalent widths are from Zapatero Osorio et~al. (2002) and Sacco et~al. (2008). The colon after the spectral type denotes a estimation based on photometry.}} \end{table}