\begin{table}%t1
\caption{\label{t1}Photometric data for $BVRI$ comparison sequence.}
%\centering
\par
\begin{tabular}{lllllllll}
\hline\hline
\noalign{\smallskip}
Star &  $V$ & $\sigma_V$& $I_{\rm c}$ & $\sigma_I$ & $R_{\rm c}$ & $\sigma_R$ & $B$ & $\sigma_B$ \\
\hline
A&15.052&0.037&12.570& 0.041 & 13.782 & 0.026 & 17.160 & 0.051 \\
B&16.084&0.032&14.279&0.031&15.124&0.028&17.569&0.039\\
C&16.749&0.030&12.595&0.077&14.614&0.043&19.962&0.124\\
D&17.080&0.031 & 14.440 & 0.039 & 15.747 & 0.035 & 19.241 & 0.087 \\
E & 17.090 & 0.030 & 14.362 & 0.036 & 15.729 & 0.035 & 19.226 & 0.080 \\
F & 17.508 & 0.045 & 12.625 & 0.071 & 15.166 & 0.060 & 20.535 & 0.176 \\
G & 17.718 & 0.038 & 14.627 & 0.041 & 16.152 & 0.034 & 20.221 & 0.176 \\
H & 17.740 & 0.038 & 15.541 & 0.033 & 16.653 & 0.046 & 19.498 & 0.095 \\
I & 17.810 & 0.045 & 14.996 & 0.036 & 16.440 & 0.041 & 19.940 & 0.052 \\
J & 17.954 & 0.055 & 16.037 & 0.038 & 17.006 & 0.035 & 19.500 & 0.085 \\
K & 18.102 & 0.084 & 14.950 & 0.059 & 16.606 & 0.054 & 20.386 & 0.203 \\
L & 18.140 & 0.045 & 14.983 & 0.042 & 16.539 & 0.038 & 20.633 & 0.251 \\
M & 18.325 & 0.048 & 15.743 & 0.037 & 17.135 & 0.035 & 20.164 & 0.110 \\
N & 18.618 & 0.048 & 16.714 & 0.046 & 17.666 & 0.026 & 20.174 & 0.092 \\
O & 19.697 & 0.134 & 16.680 & 0.062 & 18.185 & 0.067 & $-$ & $-$ \\
\hline                                    
\end{tabular}
\end{table}