\begin{table}%t2 \par \caption{\label{tab2}X-ray coverage and 0.5--10~keV band flux of the sample.} %\centerline {\begin{tabular}{cccccc} \hline\hline \multicolumn{1}{c} {ID}& \multicolumn{1}{c} {Exposure}& \multicolumn{1}{c} {Telescope}& \multicolumn{1}{c} {CR$_{0.5-10}$}& \multicolumn{1}{c} {Flux$_{0.5-10}$}& \multicolumn{1}{c} {Log($F_{2-10}$/$F_{\rm R}$)}\\ (1) & (2) &(3) & (4) & (5) & (6) \\ \hline 1 & 18.8 & {\em XMM--N} & $25.6\pm4.3$ & $18.2\pm3.1$ &$50.1 \pm 8.4$ \\ 2 & 23.2 & {\em XMM--N} & $2.1\pm0.9$ & $1.8\pm0.8$ &$<$2.0 \\ 3 & 29.3 & {\em XMM--N} & $<$2.4 & $<$2.1 &$<$2.3 \\ 4 & 38.0 & {\em XMM--N} & $3.9\pm1.2$ & $9.4\pm5.1$ &$79.4 \pm 24.4$ \\ 5 & 31.8 & {\em XMM--N} & $3.5\pm1.8$ & $2.4\pm1.1$ &$0.4 \pm 0.2$ \\ 6 & 32.1 & {\em XMM--N} & $86.9\pm5.1$ & $111\pm5.5$ &$131.8 \pm 7.7$ \\ 7 & 6.8 & {\em XMM--N} & $11.5\pm2.0$ & $15.6\pm2.7$ &$8.1 \pm 3.4$ \\ 8 & 9.0 & {\em XMM--N} & $3.2\pm1.6$ & $3.7\pm1.6$ &$3.0 \pm 1.5$ \\ 9 & 21.7 & {\em XMM--N} & $4.7\pm1.9$ & $6.0\pm2.3$ &$18.2 \pm 9.7$ \\ 10 & 23.7 & {\em XMM--N} & $2.1\pm1.5$ & $2.6\pm1.6$ &$<$0.7 \\ 11 & 17.0 & {\em XMM--N} & $8.5\pm3.3$ & $6.8\pm2.3$ &$2.6 \pm 1.0$ \\ 12 & 17.6 & {\em XMM--N} & $17.6\pm3.0$ & $29.1\pm9.0$ &$37.2 \pm 14.7$ \\ 13 & 4.7 & \chandra~ & $<$13.6 & $<$16.3 &$<$22.9 \\ 14 & 4.4 & \chandra~ & $<$23.7 & $<$41.9 &$<$53.24 \\ 15 & 4.4 & \chandra~ & $<$14.2 & $<$30.5 &$<$199.5 \\ 16 & 4.4 & \chandra~ & $<$14.3 & $<$25.3 &$<$67.6 \\ 17 & 4.1 & \chandra~ & $<$20.6 & $<$42.5 &$<$47.9 \\ 18 & 4.5 & \chandra~ & $<$19.0 & $<$33.6 &$<$107.2 \\ 19 & 4.6 & \chandra~ & $10.3\pm4.9$ & $15.0\pm8.7$ &$11.7 \pm 5.6$ \\ 20 & 4.7 & \chandra~ & $<$23.9 & $<$42.3 &$<$173.8 \\ 21 & 4.5 & \chandra~ & $23.4\pm7.3$ & $30.1\pm6.4$ &$25.1 \pm 7.8$ \\ 22 & 7.0 & {\em XMM--N} & $12.7\pm4.7$ & $13.4\pm5.2$ &$6.5 \pm 2.4$ \\ 23 & 4.4 & \chandra~ & $<$14.2 & $<$29.5 &$<$47.59 \\ 24 & 4.8 & \chandra~ & $<$17.9 & $<$37.8 &$<$34.7 \\ 25 & 4.6 & \chandra~ & $15.3\pm5.2$ & $22.1\pm5.5$ &$44.7 \pm 15.2$ \\ 26 & 4.4 & \chandra~ & $<$23.6 & $<$49.8 &$<$182.0 \\ 27 & 68.4 & \chandra~ & $<$2.1 & $<$3.7 &$<$2.3 \\ 28 & 4.4 & \chandra~ & $<$13.7 & $<$23.6 &$<$24.5 \\ 29 & 4.7 & \chandra~ & $<$22.0 & $<$25.2 &$<$53.7 \\ 30 & 4.5 & \chandra~ & $<$20.0 & $<$45.3 &$<$107.2 \\ 31 & 66.9 & \chandra~ &$1.4\pm0.5$ & $2.0\pm0.8$ &$1.5 \pm 0.6$ \\ 32 & 67.8 & \chandra~ & $2.3\pm0.6$ & $3.6\pm0.8$ &$2.2 \pm 0.6$ \\ 33 & 66.6 & \chandra~ & $2.6\pm0.7$ & $4.4\pm0.8$ &$3.0 \pm 0.8 $ \\ 34 & 4.7 & \chandra~ & $6.3\pm3.7$ & $10.4\pm6.1$ &$<$8.5 \\ 35 & 4.6 & \chandra~ & $<$14.4 & $<$25.5 &$<$19.5 \\ 36 & 14.2 & {\em XMM--N} & $9.1\pm4.1$ & $5.2\pm1.3$ &$5.2 \pm 2.4$ \\ 37 & 4.7 & \chandra~ & $<$14.2 & $<$31.9 &$<$6.3 \\ 38 & 17.6 & {\em XMM--N} & $<$3.0 & $<$4.3 &$<$4.8 \\ 39 & 21.0 & {\em XMM--N} & $37.0\pm4.8$ & $32.5\pm9.7$ &$41.7 \pm 5.4$ \\ 40 & 21.1 & {\em XMM--N} & $30.6\pm4.3$ & $20.0\pm2.1$ &$14.1 \pm 2.0$ \\ 41 & 26.8 & {\em XMM--N} & $21.9\pm3.4$ & $25.1\pm5.4$ &$45.7 \pm 7.1$ \\ 42 & 14.5 & {\em XMM--N} & $<$2.0 & $<$2.7 & $<2.5$ \\ 43 & 14.1 & {\em XMM--N} & $46.3\pm6.8$ & $20.4\pm3.0$ &$38.0 \pm 5.6$ \\ 44 & 22.0 & {\em XMM--N} & $49.7\pm5.4$ & $26.5\pm4.2$ &$19.1 \pm 2.1$ \\ \hline \end{tabular}} \par \smallskip Column: (1) ID; (2) total effective exposure in ks; (3) telescope (\xmm~or \chandra~); (4) background-subtracted count rate in the T band in units of $10^{-4}$ Count/s; (5) flux in the T band in units of 10$^{-15}$ erg s$^{-1}$ cm$^{-2}$; (6) logarithm of the $F_{2-10}$/F$_{\rm R}$ ratio. \end{table}