\begin{table} %t4
%\centering
\par
\caption{\label{pair}Quasar pairs (for the references in Col.~5, see Table~2).}
\small
\par
\begin{tabular}{lclcr} 
\hline\hline 
Name & Sort B1950 position & $z$ & sep($''$) & Ref. \\ 
\hline 
LBQS 0015+02        & 0015$+$02 & 2.469 & 2.2 & 25 \\ 
Q 0023+171          & 0023$+$17 & 0.945 & 4.8 & 23 \\ 
SDSS J00480$-$1051  & 0045$-$11 & 1.557 & 3.6 & 84 \\
CT 344              & 0103$-$27 & 0.848 & 0.3 & 29 \\ 
PHL 1222            & 0151$+$04 & 1.910 & 3.3 & 45 \\ 
SDSS J02451$-$0113  & 0242$-$01 & 2.46  & 4.5 & 84 \\
SDSS J02483+0009    & 0245$-$00 & 1.645 & 6.9 & 84 \\ 
CTQ 839             & 0250$-$33 & 2.24  & 2.1 & 47 \\
PKS 0537-44         & 0537$-$44 & 0.89  & 4.0 & 86 \\
SDSS J07479+4318    & 0744$+$43 & 0.50  & 9.2 & 84 \\
SDSS J09591+5449    & 0955$+$55 & 1.95  & 3.9 & 84 \\
SDSS J10287+3929    & 1025$+$39 & 1.89  & 7.5 & 84 \\
SDSS J10348+0701    & 1032$+$07 & 1.25  & 3.1 & 84 \\
2QZ J105644$-$0059  & 1054$-$00 & 2.13  & 7.2 & 84 \\
SDSS J11161+4118    & 1113$+$41 & 1.98  &13.0 & 93 \\
SDSS J11202+6711    & 1117$+$67 & 1.494 & 1.5 & 74 \\
Q 1145$-$071        & 1145$-$07 & 1.34  & 4.2 &  7 \\ 
SDSS J11583$+$1235  & 1155$+$12 & 0.596 & 3.6 & 104 \\
HS 1216+5032        & 1216$+$50 & 1.450 & 8.9 & $17,79$ \\
SDSS J12257+5644    & 1223$+$57 & 2.38  & 6.0 & 84 \\
SDSS J12599+1241    & 1257$+$12 & 2.19  & 3.6 & 84 \\
SDSS J13033+5100    & 1301$+$51 & 1.68  & 3.8 & 84 \\
SDSS J1320$+$3056   & 1318$+$31 & 1.595 & 4.7 & 104 \\
SDSS J13372+6012    & 1335$+$60 & 1.73  & 3.1 & 84 \\ 
RRS IV 26,27        & 1343$+$26 & 2.030 & 9.5 &  6 \\
SDSS J13494+1227    & 1347$+$12 & 1.72  & 3.0 & 84 \\
SDSS J14050+4447    & 1403$+$45 & 2.23  & 7.4 & 84 \\
SDSS J14098+3919    & 1407$+$39 & 2.08  & 6.8 & 84 \\ 
SDSS J1418$+$2441   & 1416$+$24 & 0.572 & 4.5 & 104 \\
SDSS J1426$+$0719   & 1423$+$07 & 1.312 & 4.3 & 104 \\
SDSS J14279-0121    & 1425$-$01 & 2.30  & 6.2 & 84 \\
SDSS J1430$+$0714   & 1427$+$07 & 1.246 & 5.4 & 104 \\
Q 1429$-$008        & 1429$-$00 & 2.076 & 5.1 & $10,20,91$ \\
SDSS J1458$+$5448   & 1456$+$55 & 1.913 & 5.1 & 104 \\
SDSS J15306+5304    & 1529$+$53 & 1.53  & 4.1 & 84 \\
SDSS J16002+0000    & 1557$+$00 & 1.010 & 1.8 & 74 \\
SDSS J1606$+$2900   & 1604$+$29 & 0.763 & 3.4 & 104 \\
RX J16290+3724      & 1627$+$37 & 0.923 & 4.3 & 42 \\ 
SDSS J1635$+$2911   & 1633$+$29 & 1.582 & 4.9 & 104 \\
Q J1643+31          & 1641$+$32 & 0.586 & 2.3 &  2 \\
SDSS J17232+5904    & 1722$+$59 & 1.60  & 3.7 & 84 \\
SDSS J21289$-$0617  & 2126$-$06 & 2.07  & 8.3 & 84 \\ 
Q 2153$-$2056       & 2153$-$20 & 1.845 & 7.8 & 22 \\
SDSS J22144+1326    & 2212$+$13 & 2.00  & 5.8 & 84 \\ 
MGC 2214+3550       & 2212$+$35 & 0.877 & 3.0 & 50 \\ 
SDSS J23365$-$0107  & 2334$-$01 & 1.285 & 1.7 & 14 \\ 
Q 2345+007          & 2345$+$00 & 2.15  & 7.1 & $54,82$ \\ 
\hline 
\end{tabular} \vspace*{-1.5mm}
\end{table}