\begin{table}%tA.9%tA.10
\caption{\label{tab_EW_n6253}List of binary systems (contact, detached and semi-detached  binaries) located at less than 8\arcmin\ from the centre which are considered as candidate members of NGC~6253.}
\par
%\centering
\small
\begin{tabular}{lrl ll cccc clcc r cccc}
\hline \hline
\noalign{\smallskip}
& & & & & & & & & & & & & & \multicolumn{4}{c}{Membership}\\
\multicolumn{1}{c}{Star}& \multicolumn{1}{c}{ID} &
\multicolumn{1}{c}{Type}&
\multicolumn{1}{c}{$\alpha_{2000}$}&
\multicolumn{1}{c}{$\delta_{2000}$}&
\multicolumn{1}{c}{$R_{\rm max}$}&
\multicolumn{1}{c}{\ovv}&
\multicolumn{1}{c}{\ovbv}&
\multicolumn{1}{c}{\ovvi}&
\multicolumn{1}{c}{$T_{\rm min}$}&
\multicolumn{1}{c}{Period}&
\multicolumn{1}{c}{Ampl.}&
\multicolumn{1}{c}{Distance}&
\multicolumn{1}{l}{MP}%\\ 
& \multicolumn{1}{c}{CMD} & \multicolumn{1}{c}{CMD} & \multicolumn{1}{c}{PLC} & \multicolumn{1}{c}{PLC} \\
& & &\multicolumn{1}{c}{[deg]} &\multicolumn{1}{c}{[deg]} &\multicolumn{1}{c}{[mag]} &\multicolumn{1}{c}{[mag]} &\multicolumn{1}{c}{[mag]} &\multicolumn{1}{c}{[mag]}
&\multicolumn{1}{c}{[HJD]} &\multicolumn{1}{c}{[d]} &\multicolumn{1}{c}{[$R$ mag]} &\multicolumn{1}{c}{[arcmin]} &\multicolumn{1}{c}{\%}%\\
&  \multicolumn{1}{c}{\textit{B-V}} & \multicolumn{1}{c}{\textit{V-I}} & \multicolumn{1}{c}{\textit{B-V}} & \multicolumn{1}{c}{\textit{V-I}} \\
\hline
\multicolumn{14}{c}{Contact binaries}\\
23188\_2 & 41~404  &EW&  254.656188433 &   --52.61619778  &    14.464   &  14.928   &  0.751     &  0.923     &  70.594    &  0.49680   &  0.32      &  6.9       &  87  & y & y & y & y   \\
10853\_2 & 31~606  &EW&  254.800782797 &   --52.669356128 &    16.342   &  16.921   &  1.049     &  1.191     &  70.777    &  0.29340   &  0.02      &  2.6       &  78  & y & y & y & y   \\
01015\_2 & 23~797  &EW&  254.782447929 &   --52.805883546 &    15.462   &  15.969   &  0.874     &  1.036     &  70.637    &  0.38720   &  0.05      &  5.9       &  22  & y & y & y & y   \\
13288\_2 & 33~521  &EW&  254.673007553 &   --52.637555967 &    14.807   &  15.444   &  1.291     &  0.955     &  70.867    &  0.47290   &  0.44      &  5.5       &  3   & n & y & y & y   \\
09268\_2 & 30~341  &EW&  254.720919972 &   --52.690243537 &    15.572   &  16.244   &  1.159     &  1.363     &  70.637    &  0.26920   &  0.04      &  2.1       &  87  & n & n & y & n   \\
03079\_1 &  2271  &EW&  254.891186992 &   --52.771171402 &    16.672   &  17.416   &  1.177     &  1.026     &  70.918    &  0.34880   &  0.39      &  5.8       &  --  & y & n & y & n   \\
10805\_2 & 31~566  &EW&  254.770365377 &   --52.670201471 &    17.518   &  18.728   &  0.563     &  1.613     &  70.773    &  0.37090   &  0.44      &  2.3       &  32  & n & y & n & y   \\
27757\_1 & 19~653  &EW&  254.908178020 &   --52.633411290 &    17.629   &  18.386   &  0.796     &  1.435     &  70.848    &  0.27310   &  0.30      &  6.7       &  --  & n & y & n & y  \\
05435\_3 & 49~849  &EW&  254.560369896 &   --52.682548310 &    17.831   &  18.476   &  1.525     &  1.149     &  70.773    &  0.37428   &  0.19      &  7.8       &  --  & y & n & y & n  \\
02366\_2 & 24~892  &EW&  254.828122494 &   --52.786876736 &    17.069   &  17.982   &  0.524     &  1.258     &  70.594    &  0.36350   &  0.31      &  5.2       &  35  & n & y & n & n  \\
09914\_1 &  7211  &EW&  254.964750204 &   --52.662654779 &    17.972   &  18.661   &  1.247     &  1.147     &  70.582    &  0.28650   &  0.17      &  7.6       &  --  & y & n & n & n  \\
17194\_2 & 36~595  &EW&  254.750496117 &   --52.583899859 &    17.339   &  18.167   &  0.980     &  1.251     &  70.742    &  0.29400   &  0.28      &  7.5       &  --  & n & y & n & n  \\
26552\_1 &     --  &EW&  254.883268519 &   --52.754444185 &    17.318   &  17.894   &  0.947     &  1.186     &  70.613    &  0.48143   &  0.02      &  4.9       &  --  & n & y & n & n  \\
\multicolumn{14}{c}{Detached and semi-detached systems}\\
26902\_2 & 44~079  &RS CVn&  254.760879590 &   --52.738914968 &   14.599     &    15.081    &    0.843    &   1.024   &    72.090   &  2.1805    &   0.05   &    1.9    &    90    \\
25070\_2 &     --  &RS CVn&  254.813983216 &   --52.738528086 &   18.513     &    19.219    &    ---      &   1.540   &    71.953   &  1.4553    &   0.06   &    2.4    &    ---   \\
09161\_2 & 30~259  &EA    &  254.800143085 &   --52.691547335 &   19.384     &    20.527    &    2.125    &   2.367   &    70.859   &  0.50611   &   0.69   &    1.5    &    ---    \\
17502\_2 & 36~826  &EA    &  254.750395425 &   --52.579915829 &   20.927     &    22.030    &    ---      &   2.596   &    70.855   &  0.54690   &   0.44   &    7.7    &    ---    \\
10340\_2 & 31~195  &EA    &  254.706854237 &   --52.676396811 &   15.894     &    16.397    &    0.920    &   1.103   &    72.051   &  1.8156    &   0.02   &    3.0    &    38    \\
06539\_2 & 28~209  &EA    &  254.653146758 &   --52.728429918 &   17.968     &    18.775    &    1.126    &   1.477   &    70.727   &  0.68230   &   0.19   &    4.4    &    ---   \\
13573\_2 & 33~743  &EA    &  254.812702563 &   --52.633378426 &   16.518     &    17.003    &    0.873    &   1.027   &    71.039   &  2.3016    &   0.34   &    4.7    &    8     \\
00145\_2 & 23~102  &EB    &  254.732762682 &   --52.818849796 &   16.494     &    17.223    &    1.228    &   1.198   &    70.676   &  0.29110   &   0.26   &    6.8    &    0     \\
08123\_2 & 29~437  &EB    &  254.789360265 &   --52.705813364 &   19.884     &    20.992    &    1.385    &   2.252   &    70.883   &  0.31903   &   0.15   &    0.7    &    ---   \\
\hline
\end{tabular}
\vspace*{3mm}
\caption{\label{tab_rot_n6253}List of rotational and long-period variables located at less  than~8\arcmin\ from the centre which are considered to be candidate cluster members.}
\par
%\centering
\small
\begin{tabular}{lrl ll cccc clcc r }
\hline \hline
\noalign{\smallskip}
\multicolumn{1}{c}{Star}& \multicolumn{1}{c}{ID} &
\multicolumn{1}{c}{Type}&
\multicolumn{1}{c}{$\alpha_{2000}$}&
\multicolumn{1}{c}{$\delta_{2000}$}&
\multicolumn{1}{c}{\ovr}&
\multicolumn{1}{c}{\ovv}&
\multicolumn{1}{c}{\ovbv}&
\multicolumn{1}{c}{\ovvi}&
\multicolumn{1}{c}{$T_{\rm max}$}&
\multicolumn{1}{c}{Period}&
\multicolumn{1}{c}{Ampl.}&
\multicolumn{1}{c}{Distance}&
\multicolumn{1}{l}{MP} \\
&&  &\multicolumn{1}{c}{[deg]} &\multicolumn{1}{c}{[deg]} &\multicolumn{1}{c}{[mag]} &\multicolumn{1}{c}{[mag]} &\multicolumn{1}{c}{[mag]} &\multicolumn{1}{c}{[mag]}
&\multicolumn{1}{c}{[HJD]} &\multicolumn{1}{c}{[d]} &\multicolumn{1}{c}{[$R$ mag]} &\multicolumn{1}{c}{[arcmin]} &\multicolumn{1}{c}{\%}\\
\hline
09901\_2   &    30~842 & RO1 &   254.732275735 &   --52.681556393  &    17.619    & 18.247    &  1.038  & 1.351 &      72.668     &  1.11842   &   0.08   &  2.1  & ---  \\
11977\_1   &     8713 & RO1 &   254.929865891 &   --52.630746475  &    16.185    & 16.592    &  0.749  & 0.849 &      71.188     &  1.8424    &   0.01   &  7.4  & ---  \\
07392\_1   &     5378 & RO1 &   254.904680899 &   --52.702647524  &    17.641    & 18.217    &  1.040  & 1.195 &      70.914     &  2.982     &   0.11   &  4.9  & ---  \\
14911\_2   &    34~814 & RO1 &   254.721536966 &   --52.615435459  &    17.702    & 18.299    &  1.053  & 1.212 &      70.902     &  1.5806    &   0.05   &  5.9  &  63  \\
10372\_2   &    31~220 & RO1 &   254.679930555 &   --52.675735040  &    17.650    & 18.317    &  1.080  & 1.456 &      72.957     &  2.735     &   0.04   &  3.8  &  26  \\
15993\_2   &    35~676 & RO1 &   254.846280438 &   --52.600497324  &    18.851    & 19.741    &  1.462  & 1.844 &      71.766     &  3.151     &   0.03   &  7.0  & ---  \\
10042\_2   &    30~960 & RO1 &   254.772538141 &   --52.679593806  &    15.946    & 16.379    &  0.872  & 1.029 &      71.445     &  3.134     &   0.07   &  1.7  &  87   \\
11077\_2   &    31~786 & RO1 &   254.861672278 &   --52.666238861  &    16.725    & 17.281    &  0.978  & 1.194 &      70.801     &  5.12      &   0.06   &  4.2  &  71   \\
06236\_1   &     4548 & RO1 &   254.893544476 &   --52.721902773  &    16.148    & 16.614    &  0.865  & 0.972 &      72.207     &  1.7453    &   0.01   &  4.5  & ---  \\
06932\_2   &    28~498 & RO1 &   254.812770851 &   --52.722474381  &    17.550    & 18.151    &  1.072  & 1.347 &      70.688     &  0.90140   &   0.05   &  1.7  &  10  \\
09775\_2   &    30~740 & RO1 &   254.850965423 &   --52.683323748  &    17.484    & 18.182    &  1.118  & 1.482 &      72.156     &  2.1351    &   0.02   &  3.3  &  64  \\
04913\_3   &    49~473 & RO1 &   254.567369728 &   --52.735127801  &    17.894    & 18.513    &  1.035  & 1.240 &      71.395     &  1.10089   &   0.04   &  7.6  & ---  \\
00455\_2   &    23~352 & RO1 &   254.786845032 &   --52.814066276  &    19.023    & 19.914    &  1.496  & 1.862 &      70.949     &  1.21222   &   0.07   &  6.4  & ---  \\
22278\_2   &    40~654 & RO1 &   254.649579305 &   --52.665822056  &    19.457    & 20.440    &  1.604  & 2.026 &      70.988     &  0.86412   &   0.07   &  5.1  & ---  \\
06387\_2   &    28~088 & RO2 &   254.793146373 &   --52.730407627  &    15.970    & 16.476    &  0.937  & 1.130 &      71.191     &  0.92213   &   0.02   &  1.6  &  85   \\
02131\_1   &     1588 & RO2 &   254.946929133 &   --52.786367467  &    19.053    & 20.007    &  1.239  & 1.889 &      71.059     &  1.8307    &   0.16   &  7.9  & ---  \\
15877\_2   &    ---     & Erupt.& 254.703470476 &   --52.602380112  &    23.035    &    ---    & --- &   ---     &      ---        & ---     &   3.0:   &  6.8         &              ---     \\
07619\_2   &    29~043 & LON &   254.811684961 &   --52.712570710  &    17.009    & 17.559    &  0.960  & 1.147 &      ---        &  ---    &   0.02   &  1.5  &   7    \\
12230\_2   &    32~699 & LON &   254.815958044 &   --52.651011235  &    17.029    & 17.748    &  1.192  & 1.463 &      ---        &  ---    &   0.07   &  3.8  &   4    \\
05077\_2   &    27~059 & LON &   254.688821000 &   --52.748940203  &    18.568    & 19.331    &  1.288  & 1.661 &      ---        &  ---    &   0.11   &  3.8  &   8  \\
11785\_3   &    55~053 & LON &   254.627601281 &   --52.719312463  &    16.004    & 16.539    &  0.892  & 1.031 &      ---        &  ---    &   0.01   &  5.2  & ---  \\
13846\_2   &    33~961 & LON &   254.709665037 &   --52.629843248  &    17.590    & 18.207    &  1.312  & 1.447 &      ---        &  ---    &   0.09   &  5.2  &  39  \\
14735\_2   &    34~670 & LON &   254.747409696 &   --52.617616901  &    17.577    & 18.396    &  1.286  & 1.708 &      ---        &  ---    &   0.08   &  5.5  &  55  \\
09250\_3   &    52~908 & LON &   254.622067452 &   --52.721515269  &    18.533    & 19.357    &  1.222  & 1.604 &      ---        &  ---    &   0.10   &  5.5  & ---  \\
15240\_2   &    35~074 & LON &   254.740026868 &   --52.611151405  &    16.008    & 16.576    &  0.926  & 1.199 &      ---        &  ---    &   0.05   &  5.9  &   6    \\
00690\_2   &    23~539 & LON &   254.688379093 &   --52.810472274  &    17.482    & 18.024    &  0.942  & 1.127 &      ---        &  ---    &   0.03   &  6.8  &  ---  \\
11608\_1   &     8447 & LON &   254.917947764 &   --52.636605888  &    17.854    & 18.534    &  1.122  & 1.376 &      ---        &  ---    &   0.02   &  6.9  &  ---  \\
23368\_1   &    16~649 & LON &   254.892499238 &   --52.618200382  &    15.549    & 16.040    &  0.856  & 1.000 &      ---        &  ---    &   0.01   &  7.0  &  ---  \\
11777\_1   &     8568 & LON &   254.921940390 &   --52.633881686  &    17.234    & 17.765    &  0.989  & 1.090 &      ---        &  ---    &   0.02   &  7.1  &  ---  \\
13344\_1   &     9747 & LON &   254.880051821 &   --52.608379595  &    15.602    & 16.076    &  0.860  & 0.961 &      ---        &  ---    &   0.01   &  7.2  &  ---  \\
07644\_3   &    51~551 & LON &   254.601869594 &   --52.646720559  &    16.818    & 17.437    &  0.947  & 1.196 &      ---        &  ---    &   0.02   &  7.2  &  ---  \\
10299\_3   &    53~801 & LON &   254.619740373 &   --52.629216703  &    17.646    & 18.376    &  0.997  & 1.390 &      ---        &  ---    &   0.05   &  7.3  &  ---  \\
17201\_2   &    36~599 & LON &   254.732771506 &   --52.583879199  &    18.757    & 19.465    &  1.250  & 1.516 &      ---        &  ---    &   0.08   &  7.6  &  ---  \\
\hline
\end{tabular}
\end{table}