
\documentstyle {l-aa}

\begin{document}

\addtocounter{table}{0}

\begin{table*}
%table 1
\caption []{X-ray data for our sample. Listed are all X-ray sources
detected in the ROSAT All-Sky Survey (sorted by right ascension),
studied optically in this work. We list ROSAT source
designation (X-ray positions can be obtained from data in Table 2),
number of  counts in the broad ROSAT band with errors, exposure time,
hardness ratios with errors, the maximum likelihood of existence $ML$,
the emission energy (typical error being $\pm 0.55$~keV), the 
absorbing foreground column density (typical error $\pm 0.77$,
in $\log (N_{\rm H})~{\rm cm}^{-2})$, and finally the X-ray flux
(typical error $\pm 1.87 \,10^{-13} \mbox {erg s}^{-1} {\rm cm}^{-2}$)}

\begin {flushleft}
\begin{tabular}{lr@{$\pm$}lcr@{$\pm$}lr@{$\pm$}lrccrc} 
\noalign{\smallskip}
\hline
\noalign{\smallskip}
  designation & \multicolumn{2}{c}{counts} & exp  & \multicolumn{2}{c}{$HR\,1$} & \multicolumn{2}{c}{$HR\,2$} 
  & $ML$  & k$ T_{\rm X}$   & $\log (N_{\rm H})$  & {$f_{\rm X}/10^{-13}$} \hspace {-0.5 cm}   &\\
~ & \multicolumn{2}{c}{~} &  (s)  & \multicolumn{2}{c}{~} & \multicolumn{2}{c}{~}  &  &  (keV)  &  (cm$^{-2})$ &  (erg~s$^{-1}$~cm$^{-2}$) \hspace {-0.7 cm} & \hspace {0.5 cm}\\ 
\noalign{\smallskip}
\hline
\noalign{\smallskip}
RXJ0207.0$-$1407 &    7.1 & 3.3 &442.1 & 1.00 &0.21 & 0.69 &0.31 & 14.3 &  1.14 & 22.00 & 19.56 &\\
RXJ0209.1$-$1536 &   16.3 & 5.5 &444.2 & 0.95 &0.49 &-0.09 &0.35 & 21.8 &  0.72 & 20.85 &  5.17 &\\
RXJ0210.4$-$1308 &   21.5 & 7.3 &548.2 & 0.35 &0.31 & 0.20 &0.39 & 17.7 &  1.07 & 18.10 &  3.53 &\\
RXJ0212.3$-$1330 &   17.9 & 6.8 &556.2 & 0.20 &0.38 & 0.23 &0.45 & 10.9 &  1.22 & 18.00 &  2.98 &\\
RXJ0215.0$-$1402 &    9.9 & 4.5 &529.3 & 0.67 &0.38 & 0.43 &0.53 & 12.4 &  1.67 & 20.35 &  3.06 &\\
RXJ0218.6$-$1004 &   17.9 & 5.6 &486.2 & 1.00 &0.12 &-0.04 &0.31 & 21.7 &  0.58 & 21.55 & 11.53 &\\
RXJ0219.4$-$1321 &   11.6 & 4.7 &523.8 & 0.92 &0.63 &-0.03 &0.40 & 12.3 &  0.81 & 20.60 &  2.76 &\\
RXJ0219.7$-$1026 &   46.2 & 9.4 &530.5 & 0.49 &0.19 & 0.46 &0.19 & 53.1 &  1.70 & 20.10 & 12.16 &\\
RXJ0220.4$-$1305 &   15.8 & 6.5 &506.5 & 0.07 &0.45 &-0.23 &0.25 & 10.5 &  0.39 & 18.00 &  2.31 &\\
RXJ0223.3$-$1615 &    8.6 & 4.1 &532.1 & 1.00 &0.22 & 0.18 &0.46 &  9.6 &  0.57 & 21.85 & 21.09 &\\
RXJ0229.5$-$1224 &   12.3 & 5.0 &516.4 & 0.60 &0.35 & 0.41 &0.37 & 12.8 &  1.68 & 20.25 &  3.70 &\\
RXJ0237.3$-$0527 &    9.2 & 4.5 &279.4 & 0.22 &0.48 & 0.44 &0.68 &  7.7 &  1.63 & 19.45 &  3.60 &\\
RXJ0239.1$-$1028 &    6.5 & 3.3 &326.0 & 0.33 &0.51 & 0.26 &0.24 & 12.7 &  1.15 & 18.90 &  1.91 &\\
RXJ0243.9$-$0850 &    8.3 & 4.5 &341.7 & 0.44 &0.44 & 0.55 &0.74 &  7.5 &  1.67 & 20.00 &  3.22 &\\
RXJ0248.3$-$1117 &    8.0 & 4.3 &418.7 & 0.16 &0.28 & 0.01 &0.38 &  7.7 &  1.15 & 18.00 &  1.76 &\\
RXJ0251.8$-$0203 &    8.5 & 3.9 &325.7 & 0.43 &0.43 & 0.09 &0.46 & 12.6 &  0.96 & 18.00 &  2.28 &\\
RXJ0254.8$-$0709 &   10.4 & 4.4 &329.7 & 0.70 &0.32 & 0.76 &0.26 & 15.7 &  1.94 & 21.80 & 20.03 &\\
RXJ0255.8$-$0750 &    8.7 & 4.3 &330.5 & 0.89 &0.80 & 0.30 &0.42 & 10.0 &  1.17 & 20.60 &  4.15 &\\
RXJ0309.1+0324 &   28.5 & 7.2 &614.3 & 0.81 &0.19 & 0.39 &0.24 & 38.1 &  1.39 & 20.50 &  7.75 &\\
RXJ0312.8$-$0414 &   34.0 & 7.9 &424.7 & 0.64 &0.20 & 0.07 &0.23 & 43.4 &  0.93 & 19.70 &  8.31 &\\
RXJ0314.8$-$0406 &    6.7 & 3.9 &465.8 & 1.00 &0.29 & 0.46 &0.48 &  8.5 &  0.76 & 22.00 & 24.47 &\\
RXJ0317.9+0231 &   14.3 & 5.6 &541.9 & 1.00 &0.16 &-0.01 &0.39 & 12.2 &  0.58 & 21.60 & 10.67 &\\
RXJ0319.3+0003 &    8.7 & 4.4 &603.2 & 1.00 &0.26 &-0.10 &0.51 &  8.8 &  0.55 & 21.45 &  4.66 &\\
RXJ0324.4+0231 &   21.7 & 7.1 &461.1 & 0.36 &0.34 & 0.15 &0.38 & 16.6 &  1.03 & 18.00 &  4.23 &\\
RXJ0329.1+0118 &   11.9 & 4.9 &637.8 & 1.00 &0.14 & 0.50 &0.35 & 12.5 &  0.83 & 22.00 & 28.73 &\\
RXJ0330.7+0306 &   54.4 & 9.8 &737.7 & 1.00 &0.04 & 0.05 &0.18 & 54.9 &  0.59 & 21.70 & 40.64 &\\
RXJ0333.0+0354 &    9.9 & 4.5 &634.2 & 1.00 &0.22 & 0.57 &0.46 & 10.5 &  0.94 & 22.00 & 21.98 &\\
RXJ0333.1+1036 &   20.3 & 6.2 &564.3 & 0.36 &0.25 & 0.48 &0.26 & 30.8 &  1.66 & 19.85 &  4.55 &\\
RXJ0336.0+0846 &    8.7 & 4.0 &543.0 & 0.78 &0.85 &-0.26 &0.44 & 10.7 &  0.51 & 20.30 &  1.72 &\\
RXJ0338.1+1224 &    8.3 & 4.2 &555.1 & 1.00 &0.23 & 0.25 &0.50 & 10.0 &  0.60 & 21.90 & 18.40 &\\
RXJ0338.3+1020 &   13.2 & 4.8 &529.8 & 1.00 &0.16 & 0.17 &0.35 & 15.1 &  0.64 & 21.80 & 19.04 &\\
RXJ0339.6+0624 &    8.6 & 4.1 &569.3 & 1.00 &0.20 & 0.47 &0.40 &  9.7 &  0.78 & 22.00 & 24.42 &\\
RXJ0340.3+1220 &   26.9 & 6.6 &517.6 & 0.85 &0.17 &-0.18 &0.25 & 49.3 &  0.64 & 20.35 &  5.77 &\\
RXJ0340.5+0639 &    5.3 & 2.9 &522.8 & 1.00 &0.26 & 0.26 &0.25 &  9.8 &  0.61 & 21.90 & 12.48 &\\
RXJ0341.2+0453 &   37.6 & 8.2 &538.1 & 1.00 &0.04 & 0.26 &0.21 & 56.6 &  0.63 & 21.90 & 81.67 &\\
RXJ0341.2+0759 &    8.1 & 3.9 &567.9 & 1.00 &0.23 & 0.19 &0.47 &  8.3 &  0.59 & 21.85 & 17.56 &\\
RXJ0343.6+1039 &   17.5 & 6.0 &555.3 & 0.89 &0.30 & 0.60 &0.24 & 21.0 &  2.02 & 21.45 & 11.78 &\\
RXJ0344.8+0359 &   25.5 & 6.9 &529.7 & 0.88 &0.13 &-0.15 &0.29 & 29.0 &  0.67 & 20.45 &  5.55 &\\
RXJ0347.2+0933 &   16.1 & 5.4 &527.6 & 0.58 &0.28 & 0.85 &0.16 & 19.9 &  2.02 & 22.00 & 32.54 &\\
RXJ0347.9+0616 &    8.6 & 4.0 &466.0 & 1.00 &0.24 & 0.43 &0.19 & 11.3 &  0.70 & 22.00 & 33.14 &\\
RXJ0348.2+1109 &   23.8 & 6.5 &471.2 & 0.30 &0.28 &-0.07 &0.32 & 29.7 &  0.93 & 18.00 &  4.41 &\\
RXJ0348.5+0832 &   23.3 & 6.4 &486.9 & 0.92 &0.23 &-0.28 &0.29 & 30.6 &  0.44 & 20.80 &  6.81 &\\
RXJ0349.4+1255 &   19.7 & 5.7 &479.3 & 0.81 &0.35 &-0.25 &0.29 & 42.5 &  0.53 & 20.35 &  4.56 &\\
RXJ0350.2+0849 &    6.6 & 3.3 &470.2 & 1.00 &0.24 & 0.07 &0.51 & 11.8 &  0.61 & 21.70 &  7.74 &\\
RXJ0350.6+0454 &    7.4 & 3.7 &488.1 & 1.00 &0.23 & 0.09 &0.50 & 11.6 &  0.58 & 21.75 & 12.09 &\\
RXJ0350.6+1033 &   12.5 & 5.3 &569.5 & 1.00 &0.17 & 0.51 &0.33 &  9.4 &  0.85 & 22.00 & 33.80 &\\
RXJ0351.4+0953 &   11.8 & 4.9 &491.4 & 0.90 &0.24 &-0.25 &0.42 &  8.8 &  0.51 & 20.65 &  2.95 &\\
RXJ0351.8+0413 &    6.5 & 3.3 &441.1 & 1.00 &0.25 &-0.10 &0.52 &  9.2 &  0.55 & 21.45 &  4.77 &\\
RXJ0352.4+1223 &   11.8 & 4.8 &522.4 & 1.00 &0.18 &-0.00 &0.42 & 13.3 &  0.55 & 21.65 &  9.48 &\\
RXJ0354.1+0528 &    7.4 & 4.1 &535.0 & 1.00 &0.26 & 0.55 &0.19 &  7.6 &  0.91 & 22.00 & 20.34 &\\
\noalign{\smallskip}
 \hline
\end{tabular}
\end {flushleft}
\end{table*}



\addtocounter{table}{-1}

\begin{table*}

\caption []{Continued}
\begin{flushleft}
\begin{tabular}{lr@{$\pm$}lcr@{$\pm$}lr@{$\pm$}lrccrc} 
\noalign{\smallskip}
\hline
\noalign{\smallskip}
  designation & \multicolumn{2}{c}{counts} & exp  & \multicolumn{2}{c}{$HR\,1$} & \multicolumn{2}{c}{$HR\,2$} 
  & $ML$  & k$ T_{\rm X}$   & $\log (N_{\rm H})$  & {$f_{\rm X}/10^{-13}$} \hspace {-0.5 cm}   &\\
~ & \multicolumn{2}{c}{~} &  (s)  & \multicolumn{2}{c}{~} & \multicolumn{2}{c}{~}  &  &  (keV)  &  (cm$^{-2})$ &  (erg~s$^{-1}$~cm$^{-2}$) \hspace {-0.7 cm} & \hspace {0.5 cm}\\ 
\noalign{\smallskip}
\hline
\noalign{\smallskip}
RXJ0354.3+0535 &   19.2 & 6.1 &536.7 & 1.00 &0.11 & 0.42 &0.31 & 24.7 &  0.69 & 22.00 & 64.23 &\\
RXJ0354.4+1204 &    8.2 & 3.9 &474.2 & 0.58 &0.39 & 1.00 &1.00 & 13.2 &  1.62 & 20.20 &  2.53 &\\
RXJ0354.8+1232 &   16.6 & 5.9 &505.8 & 0.81 &0.33 &-0.11 &0.36 & 18.3 &  0.73 & 20.15 &  3.42 &\\
RXJ0356.7+0943 &   10.3 & 5.1 &507.5 & 0.60 &0.39 &-0.40 &0.42 &  9.1 &  0.32 & 20.35 &  2.80 &\\
RXJ0357.3+1258 &   17.9 & 6.1 &486.0 & 0.65 &0.24 &-0.39 &0.30 & 15.9 &  0.33 & 20.40 &  4.63 &\\
RXJ0358.1+0932 &   27.6 & 6.9 &467.6 & 0.86 &0.22 & 0.57 &0.20 & 42.7 &  2.02 & 21.35 & 19.43 &\\
RXJ0400.0+0730 &   10.0 & 4.1 &459.9 & 1.00 &0.15 & 0.61 &0.33 & 14.9 &  1.00 & 22.00 & 29.38 &\\
RXJ0400.1+0818 &  169.6 &16.6 &450.7 & 0.27 &0.10 & 0.17 &0.12 &298.5 &  1.11 & 18.00 & 34.22 &\\
RXJ0400.8+1116 &   15.7 & 5.7 &494.8 & 1.00 &0.15 &-0.05 &0.38 & 13.4 &  0.56 & 21.55 & 10.26 &\\
RXJ0402.5+0552 &   18.2 & 5.8 &414.1 & 0.68 &0.27 & 0.24 &0.37 & 19.5 &  1.11 & 20.05 &  5.37 &\\
RXJ0403.5+0837 &   20.2 & 6.2 &480.6 & 1.00 &0.09 & 0.56 &0.25 & 22.3 &  0.93 & 22.00 & 59.17 &\\
RXJ0404.4+0519 &   20.3 & 5.6 &413.6 & 1.00 &0.06 &-0.06 &0.28 & 41.8 &  0.57 & 21.55 & 15.87 &\\
RXJ0405.5+0324 &   34.2 & 7.8 &445.4 & 1.00 &0.04 & 0.03 &0.23 & 54.4 &  0.57 & 21.70 & 44.18 &\\
RXJ0407.2+0113 &   10.1 & 4.1 &421.0 & 1.00 &0.16 & 0.35 &0.39 & 13.0 &  0.52 & 22.00 & 56.03 &\\
RXJ0407.6+0638 &   19.2 & 6.4 &474.5 & 1.00 &0.08 &-0.25 &0.34 & 16.3 &  0.46 & 21.30 &  9.69 &\\
RXJ0408.6+1017 &    5.9 & 3.4 &375.6 & 1.00 &0.25 & 0.53 &0.43 &  8.0 &  0.88 & 22.00 & 23.10 &\\
RXJ0408.8+1028 &  106.0 &13.6 &387.9 & 0.52 &0.11 & 0.24 &0.14 &159.7 &  1.11 & 19.65 & 29.51 &\\
RXJ0409.8+1209 &   10.5 & 5.1 &357.3 & 0.76 &0.65 & 0.30 &0.23 &  7.7 &  1.19 & 20.30 &  4.21 &\\
RXJ0410.6+0608 &    8.7 & 3.9 &395.1 & 1.00 &0.19 & 0.08 &0.46 & 10.1 &  0.56 & 21.75 & 18.47 &\\
RXJ0413.2+1028 &   13.0 & 4.6 &374.5 & 1.00 &0.01 & 0.56 &0.11 & 20.0 &  0.97 & 22.00 & 48.87 &\\
RXJ0418.6+0143 &    9.2 & 4.5 &411.3 & 0.52 &0.40 & 0.46 &0.39 &  8.2 &  1.61 & 20.10 &  3.11 &\\
RXJ0419.8+0214 &   17.3 & 6.1 &404.5 & 1.00 &0.12 & 0.11 &0.35 & 13.6 &  0.62 & 21.75 & 34.11 &\\   
RXJ0419.9+0231 &   47.7 & 9.7 &385.4 & 1.00 &0.04 & 0.06 &0.18 & 12.5 &  0.61 & 21.70 &  7.69 &\\ 
RXJ0422.9+0141 &   15.4 & 5.9 &444.8 & 0.90 &0.25 & 0.50 &0.33 & 10.1 &  1.78 & 20.85 &  7.51 &\\
RXJ0423.5+0955 &   33.9 & 8.8 &577.2 & 0.01 &0.26 &-0.00 &0.35 & 22.9 &  2.02 & 18.00 &  5.54 &\\
RXJ0425.5+1210 &   21.3 & 6.2 &641.0 & 1.00 &0.08 &-0.09 &0.29 & 23.5 &  0.55 & 21.50 & 10.75 &\\
RXJ0426.4+0957 &   16.3 & 5.6 &657.7 & 1.00 &0.12 &-0.09 &0.34 & 18.6 &  0.54 & 21.50 &  8.01 &\\
RXJ0427.4+1039 &   20.6 & 6.3 &654.3 & 1.00 &0.10 & 0.62 &0.25 & 23.3 &  1.02 & 22.00 & 42.55 &\\
RXJ0427.5+0616 &   67.2 &11.4 &612.2 & 0.37 &0.16 &-0.06 &0.20 & 75.5 &  0.90 & 18.00 &  9.45 &\\
RXJ0427.8+0049 &   17.8 & 6.0 &495.9 & 0.84 &0.23 &-0.05 &0.34 & 17.7 &  0.80 & 20.25 &  4.04 &\\
RXJ0429.9+0155 &   15.1 & 5.1 &534.7 & 1.00 &0.11 & 0.33 &0.30 & 18.5 &  0.63 & 21.95 & 53.69 &\\
RXJ0433.7+0522 &   15.1 & 6.3 &817.3 & 1.00 &0.18 & 0.31 &0.39 & 10.2 &  0.59 & 21.95 & 37.34 &\\
RXJ0434.3+0226 &   33.6 & 8.1 &775.6 & 1.00 &0.04 & 0.11 &0.24 & 39.0 &  0.56 & 21.80 & 36.33 &\\
RXJ0435.5+0455 &   19.6 & 6.0 &746.2 & 1.00 &0.08 & 0.37 &0.26 & 25.4 &  0.58 & 22.00 & 53.09 &\\
RXJ0441.9+0537 &   96.3 &13.6 &582.9 & 1.00 &0.01 & 0.50 &0.12 &123.1 &  0.89 & 22.00 &242.90 &\\
RXJ0442.3+0118 &   19.8 & 7.1 &528.9 & 0.27 &0.44 & 0.34 &0.43 & 14.1 &  1.31 & 19.15 &  3.76 &\\
RXJ0442.5+0906 &   22.0 & 6.4 &532.0 & 0.36 &0.28 &-0.03 &0.29 & 24.2 &  0.91 & 18.00 &  3.56 &\\
RXJ0442.6+1018 &   83.9 &12.0 &537.8 & 0.90 &0.07 & 0.07 &0.14 &142.0 &  0.91 & 20.55 & 19.83 &\\
RXJ0442.9+0400 &   17.4 & 5.9 &532.6 & 1.00 &0.11 & 0.11 &0.34 & 21.3 &  0.62 & 21.75 & 26.06 &\\
RXJ0444.3+0941 &   62.2 &10.4 &568.1 & 0.58 &0.14 & 0.11 &0.17 & 95.5 &  0.97 & 19.55 & 10.84 &\\
RXJ0444.4+0725 &   12.6 & 4.9 &514.6 & 1.00 &0.15 &-0.30 &0.39 & 12.6 &  0.35 & 21.30 &  7.16 &\\
RXJ0444.7+0814 &   18.9 & 6.6 &571.0 & 0.58 &0.33 & 0.32 &0.35 & 19.2 &  1.25 & 20.00 &  4.27 &\\
RXJ0445.2+0729 &   10.1 & 5.0 &568.8 & 1.00 &0.21 & 0.19 &0.46 &  8.0 &  0.59 & 21.85 & 21.86 &\\
RXJ0445.3+0914 &    9.5 & 4.7 &600.6 & 1.00 &0.21 & 0.43 &0.51 &  8.9 &  0.70 & 22.00 & 28.40 &\\
RXJ0445.5+1207 &    9.4 & 4.4 &617.3 & 0.78 &0.50 & 0.60 &0.40 & 11.6 &  2.02 & 21.40 &  5.01 &\\
RXJ0448.0+0738 &   88.8 &12.8 &535.0 & 0.28 &0.14 &-0.13 &0.18 & 93.9 &  0.44 & 18.00 & 12.52 &\\
RXJ0450.0+0151 &   20.6 & 6.3 &535.6 & 0.95 &0.21 &-0.08 &0.31 & 21.1 &  0.74 & 20.80 &  5.16 &\\
RXJ0451.6+0619 &    9.5 & 4.3 &558.8 & 1.00 &0.18 &-0.04 &0.45 &  8.9 &  0.58 & 21.55 &  5.33 &\\
RXJ0459.9+1017 &   29.4 & 7.7 &603.5 & 1.00 &0.05 & 0.32 &0.23 & 27.8 &  0.62 & 21.95 & 98.47 &\\
RXJ0511.2+1031 &   18.4 & 6.4 &661.5 & 1.00 &0.13 & 0.26 &0.37 & 15.7 &  0.62 & 21.90 & 34.24 &\\
RXJ0511.9+1112 &   12.9 & 4.8 &618.1 & 0.71 &0.36 & 0.29 &0.37 & 12.8 &  1.18 & 20.20 &  2.87 &\\
RXJ0512.0+1020 &   23.6 & 6.7 &651.2 & 0.78 &0.21 & 0.13 &0.29 & 23.4 &  0.99 & 20.20 &  4.46 &\\
RXJ0513.6+0955 &    9.2 & 3.9 &593.2 & 0.43 &0.42 &-0.45 &0.17 & 14.4 &  0.29 & 20.25 &  1.98 &\\
\noalign{\smallskip}
\hline

\end{tabular}
\end {flushleft}
\end{table*}


 
\addtocounter{table}{-1}
\begin{table*}

\caption []{Continued}

\begin {flushleft}
\begin{tabular}{lr@{$\pm$}lcr@{$\pm$}lr@{$\pm$}lrccrc} 
\noalign{\smallskip}
\hline
\noalign{\smallskip}
  designation & \multicolumn{2}{c}{counts} & exp  & \multicolumn{2}{c}{$HR\,1$} & \multicolumn{2}{c}{$HR\,2$} 
  & $ML$  & k$ T_{\rm X}$   & $\log (N_{\rm H})$  & {$f_{\rm X}/10^{-13}$} \hspace {-0.5 cm}   &\\
~ & \multicolumn{2}{c}{~} &  (s)  & \multicolumn{2}{c}{~} & \multicolumn{2}{c}{~}  &  &  (keV)  &  (cm$^{-2})$ &  (erg~s$^{-1}$~cm$^{-2}$) \hspace {-0.7 cm} & \hspace {0.5 cm}\\
\noalign{\smallskip}
 \hline
\noalign{\smallskip}
RXJ0515.3+1221 &   27.5 & 7.9 &690.5 & 0.57 &0.24 &-0.07 &0.30 & 24.4 &  0.79 & 19.05 &  3.46 &\\ 
RXJ0516.3+1148 &   24.9 & 7.3 &658.6 & 0.98 &0.24 &-0.03 &0.29 & 23.8 &  0.54 & 21.60 & 15.87 &\\
RXJ0523.0+0934 &    8.3 & 4.1 &429.6 & 0.74 &0.52 &-0.25 &0.51 &  8.0 &  0.54 & 20.15 &  1.92 &\\
RXJ0523.5+1005 &   28.7 & 6.9 &466.5 & 0.93 &0.15 & 0.15 &0.22 & 49.7 &  0.98 & 20.70 &  9.10 &\\
RXJ0523.9+1101 &    6.8 & 3.3 &498.8 & 0.28 &0.40 &-0.10 &0.24 & 16.2 &  0.78 & 18.00 &  1.14 &\\
RXJ0525.7+1205 &   15.6 & 6.3 &846.4 & 1.00 &0.15 & 0.62 &0.13 &  9.9 &  1.02 & 22.00 & 24.91 &\\
RXJ0528.4+1213 &   33.8 & 7.9 &661.9 & 1.00 &0.05 & 0.06 &0.23 & 43.3 &  0.61 & 21.70 & 28.14 &\\
RXJ0528.5+1219 &   11.0 & 4.4 &626.0 & 0.66 &0.29 & 0.30 &0.37 & 17.0 &  1.19 & 20.10 &  2.32 &\\
RXJ0528.9+1046 &   13.2 & 5.0 &639.2 & 1.00 &0.16 & 0.64 &0.25 & 21.4 &  1.05 & 22.00 & 26.86 &\\
RXJ0529.3+1210 &   23.2 & 6.9 &631.9 & 0.15 &0.29 & 0.03 &0.42 & 24.2 &  1.20 & 18.00 &  3.40 &\\
RXJ0530.9+1227 &   28.2 & 7.5 &693.4 & 1.00 &0.06 & 0.34 &0.25 & 23.2 &  0.51 & 22.00 & 94.99 &\\
RXJ0531.8+1218 &   10.5 & 4.8 &688.5 & 0.61 &0.30 &-0.02 &0.46 &  7.9 &  0.84 & 19.40 &  1.42 &\\ 
\noalign{\smallskip}
\hline

\end {tabular}
\end {flushleft}
\end {table*}

%\addtocounter{table}{1}

\begin{table*}
%table 2

\caption []{Closest optical counterparts. Listed is the closest optical
counterpart to each X-ray source in Table 1.
 We list designation (as in Table 1, but with indications of the
particular counterpart meant here, if several counterparts have been
observed), optical position (for J\,2000.0) from the GSC (or Simbad if
available), offset between X-ray and optical position, V magnitude
from the GSC (or Simbad as indicated by colons if available), X-ray to
optical flux ratio, discrimination probability $P$, and remarks.  Note
that some GSC counterparts appear on several GSC plates which may have
different colors and different filters; we have always chosen the closest
counterpart, i.e.\ we neither try to average the magnitudes nor indicate
the plate color as GSC magnitudes are very uncertain anyway (about half
a magnitude)}

\begin {flushleft}
\begin{tabular}{lrrrrrccl} 
\noalign {\smallskip}
\hline
\noalign {\smallskip}
  designation & $\alpha$ (opt.) & $\delta$ (opt.) & $\Delta \alpha (\arcsec)$ & $\Delta \delta (\arcsec)$ &
    $V$ & $\log (f_{\rm X}/f_{\rm V})$ & $P$ & remarks \\ 
\noalign {\smallskip}
\hline
\noalign {\smallskip}
 RXJ0207.0-1407  & 2 07 02.94 & -14 06 52.0 & -33.0 &  -5.8 & 15.1 & -0.83 & 0.65 &\\
  RXJ0209.1-1536  & 2 09 06.70 & -15 35 43.0 &  -3.6 &   0.7 & 13.0 & -1.32 & 0.81 &\\
  RXJ0210.4-1308NE& 2 10 25.84 & -13 07 57.0 &   3.0 &   4.9 & 10.5 & -2.29 & 0.76 &\\
  RXJ0212.3-1330  & 2 12 18.72 & -13 30 42.1 &  17.6 & -17.3 & 11.4 & -2.01 & 0.65 &\\
  RXJ0215.0-1402  & 2 15 00.45 & -14 01 31.9 &  13.8 &  31.9 & 15.1 & -0.77 & 0.54 &\\
  RXJ0218.6-1004  & 2 18 39.54 & -10 04 05.0 & -12.3 &   6.3 & 11.8 & -1.79 & 0.81 &\\
  RXJ0219.4-1321B & 2 19 25.30 & -13 21 06.6 &   9.6 & -12.0 & 14.8 & -0.81 & 0.65 &\\
  RXJ0219.7-1026  & 2 19 47.38 & -10 25 39.9 &  -9.3 &   6.9 & 11.6 & -1.50 & 0.70 &\\
  RXJ0220.4-1305  & 2 20 28.34 & -13 05 23.9 &   0.5 & -18.8 & 14.6 & -0.75 & 0.27 &\\
  RXJ0223.3-1615NE& 2 23 21.41 & -16 14 20.9 &  -5.3 &  12.8 & 13.4 & -1.51 & 0.86 &\\
  RXJ0229.5-1224  & 2 29 35.05 & -12 24 08.8 &  13.0 & -13.6 &  9.9:& -2.74 & 0.54 &HD 15526  \\
  RXJ0237.3-0527  & 2 37 19.85 & -05 26 54.1 &   4.6 &   7.6 & 13.3 & -1.24 & 0.54 &\\
  RXJ0239.1-1028  & 2 39 08.72 & -10 27 44.1 &  -0.6 &   2.7 & 13.2 & -1.50 & 0.65 &\\
  RXJ0243.9-0850  & 2 43 52.29 & -08 49 30.3 &  18.3 &  14.2 & 12.9 & -1.53 & 0.59 &\\
  RXJ0248.3-1117  & 2 48 22.16 & -11 17 12.3 &  25.8 &   6.4 & 12.0 & -2.00 & 0.65 &\\
  RXJ0251.8-0203  & 2 51 48.47 & -02 03 38.1 &  11.1 &  -8.9 & 12.7 & -1.58 & 0.76 &\\
  RXJ0254.8-0709SE& 2 54 52.43 & -07 09 24.2 &   4.7 &   5.8 & 14.5 & -0.78 & 0.59 &\\
  RXJ0255.8-0750S & 2 55 52.63 & -07 50 39.0 &  -3.4 & -15.3 & 14.0 & -1.06 & 0.81 &\\
  RXJ0309.1+0324N & 3 09 09.86 &  03 23 44.4 &  25.7 &   5.6 & 10.2 & -2.33 & 0.59 &\\
  RXJ0312.8-0414NW& 3 12 50.43 & -04 14 08.1 &  20.8 & -18.4 &  9.9 & -2.22 & 0.76 &\\
  RXJ0314.8-0406  & 3 14 50.70 & -04 05 56.4 & -14.6 &  -5.5 & 14.4 & -1.16 & 0.70 &\\
  RXJ0317.9+0231  & 3 17 59.18 &  02 30 12.9 &  11.6 &  32.9 & 11.0 & -2.26 & 0.70 &\\
  RXJ0319.3+0003  & 3 19 22.53 &  00 02 32.4 &  -0.2 &  17.6 &  9.2:& -3.24 & 0.27 &SAO 130417, (1) \\
  RXJ0324.4+0231  & 3 24 25.22 &  02 31 01.2 &   3.6 &  -7.7 & 12.4 & -1.45 & 0.65 &\\
  RXJ0329.1+0118  & 3 29 08.01 &  01 18 05.3 & -15.0 &  11.4 & 10.7 & -2.52 & 0.65 &\\
  RXJ0330.7+0306N & 3 30 43.45 &  03 05 47.9 &  12.4 &   2.6 & 10.9 & -1.86 & 0.81 &\\
  RXJ0333.0+0354  & 3 33 01.54 &  03 53 38.4 &   3.0 &  14.9 & 13.3 & -1.55 & 0.70 &\\
  RXJ0333.1+1036  & 3 33 11.62 &  10 35 56.3 &  -9.6 &   9.8 & 11.7 & -1.84 & 0.65 &\\
  RXJ0336.0+0846  & 3 36 00.32 &  08 45 35.7 &  15.4 &   0.6 & 12.4 & -1.94 & 0.76 &\\
  RXJ0338.1+1224  & 3 38 09.04 &  12 23 53.1 &  16.6 &   0.6 & 10.9 & -2.55 & 0.65 &\\
  RXJ0338.3+1020  & 3 38 18.21 &  10 20 17.1 &  21.6 &  -6.2 & 11.0 & -2.30 & 0.70 &\\
  RXJ0339.6+0624  & 3 39 40.57 &  06 24 43.1 &  13.5 & -17.3 & 11.3 & -2.38 & 0.70 &\\
  RXJ0340.3+1220  & 3 40 19.26 &  12 20 18.0 &  -1.4 &  -0.3 & 12.5 & -1.36 & 0.76 &\\
  RXJ0340.5+0639  & 3 40 31.48 &  06 39 00.3 & -15.4 &  11.8 & 13.2 & -1.79 & 0.81 &\\
  RXJ0341.2+0453  & 3 41 14.30 &  04 53 25.4 &   3.2 & -11.0 & 15.2 & -0.17 & 0.70 &\\
  RXJ0341.2+0759  & 3 41 14.36 &  07 59 33.1 &   7.1 &  -3.7 & 10.7 & -2.65 & 0.70 &\\
  RXJ0343.6+1039  & 3 43 40.51 &  10 39 14.0 &  -1.9 &  -9.3 & 10.2 & -2.50 & 0.65 &\\
  RXJ0344.8+0359  & 3 44 53.15 &  03 59 30.9 &   9.0 &   5.6 & 12.3 & -1.50 & 0.81 &\\
  RXJ0347.2+0933SW& 3 47 14.25 &  09 32 53.0 &  21.5 &  -1.4 & 13.4 & -1.24 & 0.65 &\\
  RXJ0347.9+0616  & 3 47 56.81 &  06 16 07.0 &  19.1 &  -4.8 & 11.0 & -2.40 & 0.70 &\\
  RXJ0348.2+1109  & 3 48 16.50 &  11 08 41.0 &  -4.6 &  -0.8 & 10.1:& -2.34 & 0.70 &HD 23793 B, (2) \\
  RXJ0348.5+0832  & 3 48 31.42 &  08 31 37.5 &  15.9 &  -7.5 & 10.9 & -2.04 & 0.76 &\\
  RXJ0349.4+1255N & 3 49 27.85 &  12 54 41.4 &  -6.5 &   6.1 &  9.1:& -2.83 & 0.65 &BD+12 511 \\
  RXJ0350.2+0849  & 3 50 12.91 &  08 49 34.0 &  -4.5 &  -6.1 & 12.1 & -2.09 & 0.81 &\\
  RXJ0350.6+0454  & 3 50 41.72 &  04 53 44.7 & -28.8 &  -3.4 & 15.2 & -0.82 & 0.76 &\\
  RXJ0350.6+1033  & 3 50 40.80 &  10 32 51.1 &  -9.3 &  19.9 & 10.1 & -2.70 & 0.59 &\\ 
  RXJ0351.4+0953W & 3 51 26.30 &  09 53 37.0 &   2.6 & -16.5 & 12.6 & -1.23 & 0.65 &\\
  RXJ0351.8+0413  & 3 51 49.40 &  04 13 30.7 & -16.5 & -12.3 & 13.5 & -1.51 & 0.81 &\\
  RXJ0352.4+1223  & 3 52 24.68 &  12 22 44.2 &  -4.2 &  -6.9 &  9.5:& -2.93 & 0.59 &BD+11 533 \\
\noalign {\smallskip}
\hline
\noalign {\smallskip}
\end{tabular}
\end {flushleft}
\end {table*}




\addtocounter{table}{-1}

\begin{table*}

\caption []{Continued}
\begin {flushleft}
\begin{tabular}{lrrrrrccl}
\noalign {\smallskip}
 \hline
\noalign {\smallskip}
  designation & $\alpha$ (opt.) & $\delta$ (opt.) & $\Delta \alpha (\arcsec)$ & $\Delta \delta (\arcsec)$ &
    $V$ & $\log (f_{\rm X}/f_{\rm V})$ & $P$ & remarks \\
\noalign {\smallskip}
 \hline
\noalign {\smallskip}
  RXJ0354.1+0528  & 3 54 06.58 &  05 27 23.7 &  11.3 &  20.8 & 11.9 & -2.18 & 0.70 &\\
  RXJ0354.3+0535  & 3 54 21.28 &  05 35 40.9 &  -0.5 & -14.2 & 10.1 & -2.51 & 0.54 &\\
  RXJ0354.4+1204  & 3 54 25.15 &  12 04 07.9 &  -3.3 & -14.9 & 11.2 & -2.36 & 0.70 &\\
  RXJ0354.8+1232  & 3 54 50.70 &  12 32 06.4 &   4.9 &  10.7 & 12.9 & -1.40 & 0.81 &\\
  RXJ0356.7+0943  & 3 56 45.51 &  09 43 39.4 &  -4.0 & -13.2 & 13.3 & -1.44 & 0.70 &\\
  RXJ0357.3+1258  & 3 57 21.34 &  12 58 17.3 &   3.8 &   3.6 & 10.9 & -2.16 & 0.70 &\\
  RXJ0358.1+0932  & 3 58 12.62 &  09 32 21.6 & -13.5 &  -2.1 & 12.2 & -1.42 & 0.70 &\\
  RXJ0400.0+0730  & 4 00 01.14 &  07 30 10.4 &  -0.7 &   4.0 & 12.2 & -1.86 & 0.65 &\\
  RXJ0400.1+0818N & 4 00 09.37 &  08 18 19.3 &   6.6 &   4.0 &  9.9:& -1.54 & 0.65 &BD+07 582B, (3) \\
  RXJ0400.8+1116  & 4 00 53.92 &  11 15 27.8 & -25.2 &  21.9 & 13.8 & -1.07 & 0.70 &\\
  RXJ0402.5+0552  & 4 02 35.68 &  05 51 36.0 & -18.0 &  14.5 & 10.9 & -2.08 & 0.70 &\\
  RXJ0403.5+0837  & 4 03 29.69 &  08 37 14.2 &  35.6 &   4.7 & 12.6 & -1.42 & 0.76 &\\
  RXJ0404.4+0519  & 4 04 28.48 &  05 18 43.7 &  -5.1 &   4.0 & 10.9 & -2.02 & 0.81 &\\
  RXJ0405.5+0324  & 4 05 30.24 &  03 23 50.4 &  -2.1 &   6.5 & 11.5 & -1.61 & 0.81 &\\
  RXJ0407.2+0113N & 4 07 16.49 &  01 13 14.5 &  15.2 &  -4.3 & 10.5 & -2.50 & 0.54 &\\
  RXJ0407.6+0638  & 4 07 37.26 &  06 38 45.2 &   9.5 & -23.1 & 14.8 & -0.56 & 0.54 &\\
  RXJ0408.6+1017  & 4 08 39.90 &  10 17 32.6 & -13.5 & -26.8 & 12.6 & -1.84 & 0.65 &\\
  RXJ0408.8+1028  & 4 08 49.57 &  10 27 50.0 &  -3.8 &  -4.3 &  8.9:& -2.08 & 0.70 &HD 26172 \\
  RXJ0409.8+1209  & 4 09 51.54 &  12 09 02.3 &  22.0 &  -7.6 & 12.0 & -1.81 & 0.65 &HD 286556 \\
  RXJ0410.6+0608  & 4 10 39.66 &  06 08 38.9 & -22.2 & -19.8 & 12.9 & -1.56 & 0.86 &\\
  RXJ0413.2+1028  & 4 13 14.66 &  10 28 01.1 & -10.7 & -14.7 & 14.9 & -0.56 & 0.65 &\\
  RXJ0418.6+0143  & 4 18 39.27 &  01 42 10.5 &  13.5 &  29.9 & 12.3 & -1.83 & 0.59 &\\
  RXJ0419.8+0214  & 4 19 49.92 &  02 13 43.5 & -13.8 & -11.3 & 14.6 & -0.61 & 0.76 &\\
  RXJ0419.9+0231  & 4 19 59.60 &  02 30 30.6 & -11.5 &  24.1 & 13.6 & -0.54 & 0.76 &\\
  RXJ0422.9+0141  & 4 22 54.61 &  01 41 32.1 &  22.5 & -17.7 & 12.3 & -1.63 & 0.70 &\\
  RXJ0423.5+0955  & 4 23 30.28 &  09 54 30.0 &  10.6 &  13.8 & 11.6 & -1.66 & 0.49 &\\
  RXJ0425.5+1210  & 4 25 35.30 &  12 10 00.0 &  -6.3 &  -0.5 & 10.4 & -2.40 & 0.65 &HD 286753 \\
  RXJ0426.4+0957W & 4 26 26.77 &  09 56 59.7 &  11.6 &  -3.4 & 12.0 & -1.91 & 0.81 &\\
  RXJ0427.4+1039  & 4 27 30.29 &  10 38 48.9 & -11.1 &   1.7 & 11.3 & -2.05 & 0.65 &\\
  RXJ0427.5+0616  & 4 27 32.07 &  06 15 52.1 &   0.4 &   1.8 & 10.6 & -1.80 & 0.76 &\\
  RXJ0427.8+0049  & 4 27 52.84 &  00 49 25.9 &  -5.5 &   3.3 &  9.0:& -2.92 & 0.22 &BD+00 760, (4) \\
  RXJ0429.9+0155  & 4 29 56.94 &  01 54 48.9 &   0.8 &  12.0 & 11.1 & -2.19 & 0.70 &\\
  RXJ0433.7+0522  & 4 33 46.09 &  05 22 09.1 &  18.8 & -16.6 & 15.3 & -0.71 & 0.81 &\\
  RXJ0434.3+0226  & 4 34 19.51 &  02 26 26.1 &   5.8 &   2.1 & 13.3 & -1.12 & 0.86 &\\
  RXJ0435.5+0455  & 4 35 31.56 &  04 55 32.3 &  -8.9 & -12.6 &  9.7 & -2.78 & 0.49 &\\
  RXJ0441.9+0537  & 4 41 57.64 &  05 36 34.3 &   0.3 &   7.3 & 10.2:& -1.78 & 0.70 &BD+05 706  \\
  RXJ0442.3+0118  & 4 42 18.61 &  01 17 39.9 &   8.9 &   3.5 & 11.2 & -2.03 & 0.70 &\\
  RXJ0442.5+0906  & 4 42 31.94 &  09 06 01.7 & -16.5 &  10.1 & 10.6:& -1.94 & 0.76 &BD+08 742 \\
  RXJ0442.6+1018  & 4 42 40.81 &  10 17 44.8 &  -3.6 &   3.3 &  8.2 & -2.59 & 0.65 &\\
  RXJ0442.9+0400  & 4 42 54.69 &  04 00 11.7 &   9.6 &   1.7 & 10.9 & -2.21 & 0.70 &\\
  RXJ0444.3+0941  & 4 44 20.21 &  09 41 06.8 &   1.5 &   0.3 &  8.6:& -2.60 & 0.65 &HD 287017  \\
  RXJ0444.4+0725  & 4 44 27.16 &  07 24 59.8 &  -9.3 &   8.7 & 13.7 & -1.22 & 0.65 &\\
  RXJ0444.7+0814  & 4 44 45.44 &  08 13 47.6 & -20.1 &   4.5 & 11.8 & -1.86 & 0.70 &\\
  RXJ0445.2+0729  & 4 45 13.18 &  07 29 17.7 &  -9.9 &  10.4 & 12.2 & -1.97 & 0.81 &\\
  RXJ0445.3+0914  & 4 45 23.81 &  09 13 47.8 &  -4.9 & -13.0 & 11.8 & -2.15 & 0.65 &\\
  RXJ0445.5+1207  & 4 45 36.49 &  12 07 51.1 &  -7.4 & -22.4 & 12.9 & -1.74 & 0.76 &\\
  RXJ0448.0+0738  & 4 48 00.86 &  07 37 56.9 &  -5.6 &  -7.0 & 11.2 & -1.40 & 0.70 &\\
  RXJ0450.0+0151  & 4 50 04.68 &  01 50 43.1 &  17.0 &  13.2 & 12.2 & -1.63 & 0.86 &\\
  RXJ0451.6+0619  & 4 51 41.51 &  06 19 20.6 & -12.4 & -18.1 & 12.8 & -1.73 & 0.86 &\\
  RXJ0459.9+1017  & 4 59 54.95 &  10 17 18.2 & -12.6 &   0.9 & 14.4 & -0.62 & 0.76 &\\
  RXJ0511.2+1031  & 5 11 15.98 &  10 30 36.0 &  -1.2 &   8.9 & 14.0 & -1.02 & 0.86 &\\
RXJ0511.9+1112  & 5 12 00.30 &  11 12 19.8 &  -9.5 & -14.1 & 11.4 & -2.21 & 0.65 &\\
  RXJ0512.0+1020  & 5 12 03.21 &  10 20 06.8 &  -7.5 &   5.3 & 11.3 & -1.99 & 0.76 &\\
  RXJ0513.6+0955  & 5 13 40.44 &  09 54 50.7 & -13.5 &   2.3 & 12.0 & -2.08 & 0.65 &\\
\noalign {\smallskip}
\hline
 
\end{tabular}
\end {flushleft}
\end {table*}



\addtocounter{table}{-1}

\begin{table*}

\caption []{Continued}
\begin {flushleft}
\begin{tabular}{lrrrrrccl}
\noalign {\smallskip}
 \hline
\noalign {\smallskip}
  designation & $\alpha$ (opt.) & $\delta$ (opt.) & $\Delta \alpha (\arcsec)$ & $\Delta \delta (\arcsec)$ &
    $V$ & $\log (f_{\rm X}/f_{\rm V})$ & $P$ & remarks \\
\noalign {\smallskip}
 \hline
\noalign {\smallskip}
  RXJ0515.3+1221  & 5 15 20.55 &  12 21 14.1 &  12.6 &  -1.1 & 11.6 & -1.84 & 0.81 &\\ 
  RXJ0516.3+1148  & 5 16 21.52 &  11 47 47.3 &   5.3 &  -3.2 & 12.4 & -1.53 & 0.86 &\\
  RXJ0523.0+0934  & 5 23 04.65 &  09 34 01.0 & -25.2 &   5.0 & 10.4 & -2.64 & 0.76 &\\
  RXJ0523.5+1005  & 5 23 33.72 &  10 04 29.8 &  -1.5 & -11.1 & 11.2 & -1.81 & 0.76 &\\
  RXJ0523.9+1101  & 5 23 57.04 &  11 00 57.5 & -26.4 &  15.9 & 10.8 & -2.62 & 0.70 &\\
  RXJ0525.7+1205SE& 5 25 47.21 &  12 04 10.2 &   0.6 &  36.3 & 14.1 & -1.17 & 0.65 &\\
  RXJ0528.4+1213  & 5 28 25.74 &  12 12 36.1 &  -4.9 &   5.9 & 11.5 & -1.77 & 0.81 &\\
  RXJ0528.5+1219  & 5 28 35.19 &  12 19 04.0 &   1.8 &  10.1 & 12.7 & -1.77 & 0.70 &\\
  RXJ0528.9+1046  & 5 28 58.50 &  10 45 37.9 &  -7.9 &  -0.1 & 12.7 & -1.71 & 0.76 &\\
  RXJ0529.3+1210  & 5 29 18.97 &  12 09 29.7 &  -4.6 &   3.6 & 12.9 & -1.36 & 0.54 &\\
  RXJ0530.9+1227  & 5 30 57.23 &  12 27 26.8 &  27.3 &   0.4 & 10.7 & -2.19 & 0.70 &\\
  RXJ0531.8+1218  & 5 31 47.77 &  12 18 08.1 &  16.4 &  12.8 & 12.1 & -2.06 & 0.81 &\\
\noalign{\smallskip}
 \hline
\noalign {\smallskip}
\end {tabular}

\smallskip

\noindent Remarks:
(1) Not listed in the GSC;
(2) HD 23793~B (F5V) and the early-type  star HR~1174 (B3) are an optical
pair with $9\arcsec$ separation (Lindroos 1986); the later type star is more likely to be the true
optical counterpart of the X-ray source (e.g. Schmitt et al. 1993);
(3) Companion N is an unresolved binary itself;
(4) Not listed in the GSC.

\end {flushleft}
\end{table*}

%\addtocounter{table}{2}

\begin{table*}
%table 3
\caption []{Other optical counterparts observed.
Listed are optical counterparts other than those in Table 2,
but which have also been observed by us.
We list designation (as in Table 1, but with 
indications regarding the particular counterpart listed here),
approximate optical position (for J\,2000.0),
a remark regarding its position relative to the 
counterpart listed in Table 2,
approximate V magnitude, and remarks.
The source for optical positions, V magnitudes, and
remarks are either GSC, Simbad, or visual inspection of plates}

\begin {flushleft}
\begin{tabular}{lrrlll} 
\noalign {\smallskip}
 \hline
\noalign {\smallskip}
  designation & $\alpha$ (opt.) & $\delta$ (opt.) & rel. pos. & $V$ & remarks \\ \noalign {\smallskip}
\hline
\noalign {\smallskip}
    RXJ0210.4$-$1308SW & 2 10 26   & -13 07 56 & 2$\arcsec$ southwest of NE  & 12.5     & \\
    RXJ0219.4$-$1321A  & 2 20 29   & -13 20 25 & 60$\arcsec$ northeast of B  & 13       & \\
    RXJ0219.4$-$1321C  & 2 19 25   & -13 21 47 & 40$\arcsec$ south of B      & 15.5     & \\
    RXJ0223.3$-$1615SW & 2 23 25   & -16 14 31 & 10$\arcsec$ southwest of NE & 13.5     & \\
    RXJ0254.8$-$0709NW & 2 54 53   & -07 09 20 & 6$\arcsec$ northwest of SE  & 15.5     & \\
    RXJ0255.8$-$0750N  & 2 55 52   & -07 50 29 & 10$\arcsec$ north of S      & 15.5     & \\
    RXJ0309.1$+$0324S  & 3 09 10   &  03 23 42 & 2$\arcsec$ south of N       & 11       & \\
    RXJ0312.8$-$0414SE & 3 12 51   & -04 14 19 & 14$\arcsec$ southeast of NW & 10.5     & \\
    RXJ0330.7$+$0306S  & 3 30 43   &  03 05 18 & 30$\arcsec$ south of N      & 15       & \\
    RXJ0347.2$+$0933NE & 3 47 17   &  09 33 08 & 40$\arcsec$ northeast of SW & 12       & \\
    RXJ0349.4$+$1255S  & 3 49 28   &  12 54 28 & 14$\arcsec$ south of N      & 10       & BD+12 511B \\
    RXJ0351.4$+$0953E  & 3 51 28   &  09 53 34 & 25$\arcsec$ east of W       & 13.7     & \\
    RXJ0400.1$+$0818S  & 4 00 09   &  08 18 15 & 4$\arcsec$ south of N       & 10       & BD+07 582 \\
    RXJ0407.2$+$0113S  & 4 07 16   &  01 13 12 & 2$\arcsec$ south of N       & 12       & \\
    RXJ0426.4$+$0957E  & 4 27 30   &  09 57 00 & 45$\arcsec$ east of W       & 11.5     & also in GSC \\
    RXJ0525.7$+$1205NW & 5 25 44   &  12 04 30 & 45$\arcsec$ northwest of SE & 14.5     & \\ 
\noalign {\smallskip}
\hline

\end{tabular}
\end {flushleft}

\end{table*}

\newcommand {\etl} {\mbox{et al.}}

%\addtocounter{table}{3}


\begin {table*}
%table 4
\caption []{Results of medium-resolution spectroscopy of all potential
counterparts  to RASS X-ray sources. Listed are source designation, the
telescope used to observe the star (INT for the Isaac Newton Telescope,
ESO for the ESO\,1.52m telescope), H$\alpha$ equivalent width (negative
when in emission, `f' indicates that $H \alpha$ emission is filling in
the absorption line, `abs' for absorption without available equivalent
width), lithium $6708$\AA\ absorption equivalent width (colons indicate
large uncertainty), spectral type (always luminosity class V unless
otherwise noted), nature of object (see text), and remarks (e.g. `SB'
for spectroscopic binaries or `(N95c)' if mentioned in Neuh\"auser
\etl\ 1995c)}

\begin {flushleft}
\begin{tabular}{lcrrlll}
\noalign{\smallskip}
 \hline
\noalign{\smallskip}
   designation & tel. & $W_{\lambda}(H \alpha)$ & $W_{\lambda}$(Li) 
   & SpType & nature & remarks \\ 
~ & & (\AA) & (\AA) & & & \\ 
\noalign{\smallskip}
\hline
\noalign{\smallskip}
  RXJ0207.0$-$1407  & INT & 3.3      & no   & F8   & non-PMS & \\
  RXJ0209.1$-$1536  & INT & -1.2     & no   & K4   & dKe     & \\
  RXJ0210.4$-$1308SW& INT & -0.12    & no   & K3   & dKe     &  2$\arcsec$ sep. \\
  RXJ0210.4$-$1308NE& INT & 3.5      & no   & G5   & non-PMS &  2$\arcsec$ sep. \\
  RXJ0212.3$-$1330  & INT & 1.2      & no   & K1   & non-PMS & \\
  RXJ0215.0$-$1402  & INT & 1.15     & no   & K4   & non-PMS & maybe K3 III \\
  RXJ0218.6$-$1004  & INT & 1.6      & no   & G8   & non-PMS & SB \\
  RXJ0219.4$-$1321C & ESO & abs      & no   & G0   & non-PMS & \\
  RXJ0219.4$-$1321B & ESO & 0.60 f   & no   & M0   & dMe     & \\
  RXJ0219.4$-$1321A & ESO & -4.30    & no   & M3   & dMe     & \\
  RXJ0219.7$-$1026  & INT & -0.25    & 0.1:   & K4   & PMS?    & (N95c),  (1)  \\
  RXJ0220.4$-$1305  & INT & 5.7      & no   & F0?  & non-PMS & \\
  RXJ0223.3$-$1615SW& ESO & -0.8     & no   & K7   & dKe     &  $10\arcsec$ sep.\\
  RXJ0223.3$-$1615NE& ESO & 2.1      & no   & G7   & non-PMS & $10\arcsec$ sep. \\
  RXJ0229.5$-$1224  & ESO & 2.6      & 0.28 & G8   & PMS     & HD~15526\\
  RXJ0237.3$-$0527  & INT & -0.30    & no   & K5   & dKe     & (N95c) \\
  RXJ0239.1$-$1028  & INT & -0.35    & no   &K7-M0 & dKe    & SB \\
  RXJ0243.9$-$0850  & ESO & 0.50 f   & no   & M2   & dMe     & \\
  RXJ0248.3$-$1117  & INT & 2.1      & no   & G7   & non-PMS & \\
  RXJ0251.8$-$0203  & INT & -0.60    & no   & K6   & dKe     & (N95c) \\
  RXJ0254.8$-$0709NW& INT & -4.2     & no   & M5   & dMe     &  3$\arcsec$ sep. \\
  RXJ0254.8$-$0709SE& INT & -2.2     & no   & M3   & dMe     &  3$\arcsec$ sep. \\
  RXJ0255.8$-$0750N & INT & -0.7     & 0.2: & M5   & PMS?   &  $10\arcsec$ sep. \\
  RXJ0255.8$-$0750S & INT & -0.2     & no   &K7-M0 & dKe     & $10\arcsec$ sep., SB   \\
  RXJ0309.1$+$0324N & INT & 3.6      & no   & F7   & non-PMS &  2$\arcsec$ sep. \\
  RXJ0309.1$+$0324S & INT & 1.7      & no   & G6   & non-PMS &  2$\arcsec$ sep. \\
  RXJ0312.8$-$0414NW& ESO & 3.5      & 0.2  & G0   & PMS     & $14\arcsec$ sep.\\
  RXJ0312.8$-$0414SE& ESO & 2.5      & 0.3  & G8   & PMS     & $14\arcsec$ sep. \\
  RXJ0314.8$-$0406  & INT & 5.5      & no   &late A& non-PMS & \\
  RXJ0317.9$+$0231  & INT & 1.4      & no   & G6   & non-PMS & \\
  RXJ0319.3$+$0003  & ESO & 4.4      & no   & G5   & non-PMS & SAO 130417 \\
  RXJ0324.4$+$0231  & INT & -0.40    & 0.33 & K5   & PMS     & (N95c) \\
  RXJ0329.1$+$0118  & INT & 4.0      & 0.13 & G0   & PMS?     & (N95c) \\
  RXJ0330.7$+$0306N & INT & 1.1 f    & no   & K5   & dKe     & SB, (2) \\
  RXJ0330.7$+$0306S & INT & 1.0      & no   & K7   & non-PMS & \\
  RXJ0333.0$+$0354  & INT & -2.4     & 0.2:  &K7-M0 & PMS?   & (N95c)  \\
  RXJ0333.1$+$1036  & INT & -0.8     & 0.32 & K3   & PMS     & (N95c) \\
  RXJ0336.0$+$0846  & INT & -0.1     & no   & M3   & dMe     & \\
  RXJ0338.1$+$1224  & ESO & 1.5      & no   & K0   & non-PMS & \\
  RXJ0338.3$+$1020  & INT & 2.0      & 0.25 & G9   & PMS     & \\
  RXJ0339.6$+$0624  & INT & -0.1     & 0.13  & G9   & PMS?   & (N95c)  \\
  RXJ0340.3$+$1220  & INT & -1.1     & no   & K5   & dKe     & \\
  RXJ0340.5$+$0639  & ESO & 1.6      & no   & K2   & non-PMS & (3) \\
  RXJ0341.2$+$0453  & INT & 3.2      & no   & G9   & non-PMS & \\
  RXJ0341.2$+$0759  & ESO & 3.2      & no   & K0   & non-PMS & \\
  RXJ0343.6$+$1039  & INT & 1.5      & 0.1  & K0   & PMS?   & SB,  (4) \\
  RXJ0344.8$+$0359  & INT & 0.3 f    & 0.30 & K3   & PMS?     & (N95c) \\
  RXJ0347.2$+$0933SW& ESO & -0.40    & 0.4  & K4   & PMS     & \\
  RXJ0347.2$+$0933NE& ESO & 2.00     & 0.1  & G9   & PMS?   &  \\
  RXJ0347.9$+$0616  & INT & 2.6      & 0.2  & G2   & PMS     & \\
\noalign{\smallskip}
\hline
\end{tabular}
\end {flushleft}
\end {table*}



\addtocounter{table}{-1}

\begin{table*}

\caption []{Continued}

\begin {flushleft}
\begin{tabular}{lcrrlll}
\noalign{\smallskip}
 \hline
\noalign{\smallskip}
   designation & tel. & $W_{\lambda}(H \alpha)$ & $W_{\lambda}$(Li) 
   & SpType & nature & remarks \\ 
~ & & (\AA) & (\AA) & & & \\ 
\noalign{\smallskip}
\hline
\noalign{\smallskip}
   RXJ0348.2$+$1109  & ESO & 5.6      & no   & F5   & non-PMS & HD~23793B  \\
 RXJ0348.5$+$0832  & INT & -0.1     & 0.26 & G7   & PMS     & (5) \\ 
  RXJ0349.4$+$1255N & INT & 2.5      & no   & G0   & non-PMS & BD+12 511, $14\arcsec$ sep. \\  RXJ0349.4$+$1255S        & INT & 2.0      & no   & G7   & non-PMS & BD+12 511B, $14\arcsec$ sep.  \\
  RXJ0350.2$+$0849  & INT & -0.2     & no   & K5   & dKe     & SB \\
  RXJ0350.6$+$0454  & INT & -0.15    & no   & K7   & dKe     & SB \\
  RXJ0350.6$+$1033  & ESO & 2.4      & no   &K0 III& non-PMS & \\
  RXJ0351.4$+$0953W & INT & 0.5 f    & 0.3  & K1   & PMS?     & \\
  RXJ0351.4$+$0953E & INT & 2.0      & no   & F0   & non-PMS & maybe F0 III \\
  RXJ0351.8$+$0413  & ESO & 2.00     & 0.12 & G6   & PMS? & (3), (6) \\ 
  RXJ0352.4$+$1223  & ESO & 3.7      & 0.10 & G2   & PMS?     & BD+11 533\\
  RXJ0354.1$+$0528  & ESO & 2.8      & 0.24 & G8   & PMS     & (3) \\
  RXJ0354.3$+$0535  & INT & 3.5     & 0.2  & G1   & PMS     & (N95c) \\
  RXJ0354.4$+$1204  & ESO & 3.9      & no   & G5   & non-PMS & \\
  RXJ0354.8$+$1232  & INT & -1.7     & no   & K7   & dKe     & \\
  RXJ0356.7$+$0943  & INT & -2.7     & no   & M3   & dMe     & \\
  RXJ0357.3$+$1258  & INT & 1.8      & 0.25 & G0:  & PMS     &  \\
  RXJ0358.1$+$0932  & INT & -0.10 f  & 0.2  & K3   & PMS?     & (N95c) \\ 
  RXJ0400.0$+$0730  & INT & 1.3      & no   & G3   & non-PMS & \\
  RXJ0400.1$+$0818S  & ESO & 2.5     & 0.24 & K0   & PMS?     & BD+07 582, 4$\arcsec$ sep. \\
  RXJ0400.1$+$0818N  & ESO & -0.05    & 0.40 & K2   & PMS     & BD+07 582B, 4$\arcsec$ sep. \\
  RXJ0400.8$+$1116  & INT & 1.8      & no   & K0   & non-PMS & \\
  RXJ0402.5$+$0552  & INT & 1.7      & no   & G4   & non-PMS & \\
  RXJ0403.5$+$0837  & INT & 1.3      & no   & K0   & non-PMS & \\
  RXJ0404.4$+$0519  & INT & 1.0 f    & 0.25 & K0   & PMS?     & \\
  RXJ0405.5$+$0324  & INT & -0.4     & no   & K4   & dKe     & \\
  RXJ0407.2$+$0113N & INT & 3.3      & 0.2  & G4   & PMS     & 2$\arcsec$ sep. \\
  RXJ0407.2$+$0113S & INT & 0.5 f    & 0.35 & K3   & PMS     & 2$\arcsec$ sep. \\
  RXJ0407.6$+$0638  & INT & 2.0      & no   & G0   & non-PMS & \\
  RXJ0408.6$+$1017  & INT & 1.8      & no   & G7   & non-PMS & \\
  RXJ0408.8$+$1028  & ESO & 3.2      & no   & G5   & non-PMS & HD~26172\\
  RXJ0409.8$+$1209  & INT & 3.3      & 0.10 & F9   & PMS?   & HD~286556 \\
  RXJ0410.6$+$0608  & INT & -0.05    & 0.11 & K4   & PMS?   & SB? \\
  RXJ0413.2$+$1028  & INT & 3.0      & no   & G0   & non-PMS & \\
  RXJ0418.6$+$0143  & INT & 0.4 f    & no   & K4   & dKe     & \\
  RXJ0419.8$+$0214  & INT & 4.5      & no   & F5   & non-PMS & \\
  RXJ0419.9$+$0231  & INT & 3.6      & no   & F9   & non-PMS & \\
  RXJ0422.9$+$0141  & INT & 1.5      & yes  & F8   & PMS?   & SB, (7) \\
  RXJ0423.5$+$0955  & INT & -0.1     & 0.27 & K4   & PMS?     & \\
  RXJ0425.5$+$1210  & INT & 4.2      & 0.1  & F9   & PMS?     & HD~286753\\
  RXJ0426.4$+$0957W & INT & 7.5      & no   &late A& non-PMS & \\
  RXJ0426.4$+$0957E & INT & 2.9      & 0.14 & G2   & PMS?     & \\
  RXJ0427.4$+$1039  & INT & 1.3 f    & 0.35 & G0:  & PMS     &  \\
  RXJ0427.5$+$0616  & INT & 1.5      & 0.25 & G4   & PMS     & \\
  RXJ0427.8$+$0049  & INT & 3.2      & no   & G3   & non-PMS & BD+00 760, SB \\
  RXJ0429.9$+$0155  & INT & 1.5      & no   & K3   & non-PMS & maybe K3 III \\
  RXJ0433.7$+$0522  & INT & 4.0      & no   & F8   & non-PMS & \\
  RXJ0434.3$+$0226  & INT & -0.4     & 0.3  & K4   & PMS     & \\ 
  RXJ0435.5$+$0455  & INT & 1.2      & no   &K3 III& non-PMS & \\
  RXJ0441.9$+$0537  & INT & abs      & no   & G5   & non-PMS & BD+05 706, (8) \\
  RXJ0442.3$+$0118  & INT & -1.0     & no   & K2   & dKe     & \\
  RXJ0442.5$+$0906  & INT & 1.4      & 0.25 & G7   & PMS     & BD+08 742 \\
  RXJ0442.6$+$1018  & INT & 1.2      & no   & K3   & non-PMS & maybe K3 III \\
  RXJ0442.9$+$0400  & INT & 1.1      & 0.22  & K0   & PMS?     & \\
\noalign{\smallskip}
 \hline
\end{tabular}
\end {flushleft}
\end {table*}


\addtocounter{table}{-1}

\begin{table*}

\caption []{Continued}

\begin {flushleft}
\begin{tabular}{lcrrlll}
\noalign{\smallskip}
 \hline
\noalign{\smallskip}
   designation & tel. & $W_{\lambda}(H \alpha)$ & $W_{\lambda}$(Li) 
   & SpType & nature & remarks \\ 
~ & & (\AA) & (\AA) & & & \\
\noalign{\smallskip}
 \hline
\noalign{\smallskip}
  RXJ0444.3$+$0941  & INT & 3.2      & no   & F9   & non-PMS & HD~287017, SB \\
  RXJ0444.4$+$0725  & INT & -0.3     & 0.12  & K5   & PMS?   &   \\
  RXJ0444.7$+$0814  & INT & -0.80    & 0.28  & K3   & PMS?     & (N95c) \\
 RXJ0445.2$+$0729  & INT & 2.6      & 0.25  & G0   & PMS     & \\
  RXJ0445.3$+$0914  & INT & 3.8      & no   & G0   & non-PMS & \\
  RXJ0445.5$+$1207  & INT & -2.0     & 0.35 & K7   & PMS     & \\
  RXJ0448.0$+$0738  & INT & -0.1 f   & no   & K1   & dKe     & (N95c) \\
  RXJ0450.0$+$0151  & INT & 0.5 f    & 0.35 & K3   & PMS     & \\
  RXJ0451.6$+$0619  & INT & 1.3 f    & no   & K2   & dKe     & SB? \\
  RXJ0459.9$+$1017  & INT & 3.0      & no   & F5   & non-PMS & SB \\ 
  RXJ0511.2$+$1031  & INT & -2.8     & 0.65 & K7   & PMS     & \\
  RXJ0511.9$+$1112  & INT & 1.2      & 0.25 & G4   & PMS     & \\
  RXJ0512.0$+$1020  & INT & -0.1     & 0.4  & K2   & PMS     & \\
  RXJ0513.6$+$0955  & INT &  1.4     & no   & G6   & non-PMS & \\
  RXJ0515.3$+$1221  & INT & 1.2 f    & no   & K0   & dKe     & SB, (9) \\
  RXJ0516.3$+$1148  & INT & 0.1 f    & 0.5  & K4   & PMS     & (N95c) \\
  RXJ0523.0$+$0934  & INT & 4.2      & no   & F8   & non-PMS & \\ 
  RXJ0523.5$+$1005  & INT & -0.5     & no   & K3   & dKe     & SB, (9) \\ 
  RXJ0523.9$+$1101  & INT & 3.7      & no   & G0   & non-PMS & \\
  RXJ0525.7$+$1205NW& INT & 1.4      & no   & G8   & non-PMS & maybe G8 III \\	
  RXJ0525.7$+$1205SE& INT & 1.4      & no   & G8   & non-PMS & maybe G8 III \\
  RXJ0528.4$+$1213  & INT & 2.5      & no   & K2   & non-PMS & \\
  RXJ0528.5$+$1219  & INT & 0.7 f    & 0.35 & K3   & PMS     & \\
  RXJ0528.9$+$1046  & INT & 0.1 f    & 0.4  & K3   & PMS     & \\
  RXJ0529.3$+$1210  & INT & -2.0     & 0.35 &K7-M0 & PMS     & \\
  RXJ0530.9$+$1227  & INT & 1.3      & no   & K0   & non-PMS & \\
  RXJ0531.8$+$1218  & INT & -0.74    & 0.5  & K4   & PMS     & (N95c) \\ 
\noalign{\smallskip}
\hline
\end {tabular}
\end {flushleft}
\smallskip

\noindent Remarks:  
(1) Spectrum blue-shifted by $2$\AA;
(2) Star A itself is SB, with the secondary 
having almost the same spectral type as the primary;
(3) Also observed at INT;
(4) Spectrum blue-shifted by $1$\AA, the $H \alpha$ line shows a P~Cyg profile;
(5) $H \alpha$ line shows an inverse P~Cyg profile;
(6) Spectrum red-shifted by $2$\AA;
(7) SB: the primary is F8  with $H \alpha$ in
absorption and $W_{\lambda}$(Ca)$~<~W_{\lambda}$(Li)$~=~0.16$\AA, 
the secondary has $W_{\lambda}$(Ca)$~>~W_{\lambda}$(Li)$~=~0.13$\AA, 
thus the system may by a close PMS binary; 
$H \alpha$ line shows a P~Cyg profile;
(8) Very noisy spectrum;
(9) Secondary seems to have a slightly earlier spectral type.


 \end{table*}

\end {document}
