\begin{table}
\caption{\label{tabA.2}Photometry of  two images of SDSS J1001+5027 quasar and a reference star.}
%\centering
\small
{
\begin{tabular}{ c c c c c }
\hline\hline
A&B&Ref&Error&JD\\
(mag)&(mag)&(mag)&(mag)&(days)\\
\hline
18.30830 & 17.91642 & 19.95965 & 0.12438 & 50.69800\\
18.32345 & 17.93772 & 19.92900 & 0.03465 & 62.73200\\
18.30794 & 17.94314 & 19.93315 & 0.04938 & 68.69100\\
18.27762 & 17.92192 & $\cdots$ & 0.02200 & 74.71047\\
18.31762 & 17.97847 & 19.90674 & 0.04654 & 100.66100\\
18.34080 & 17.99653 & 19.93185 & 0.02832 & 103.73100\\
18.34324 & 18.00136 & 19.90626 & 0.01881 & 105.76800\\
18.34226 & 18.01672 & 20.02877 & 0.02820 & 109.72400\\
18.35312 & 18.01316 & 19.94301 & 0.14773 & 111.65300\\
18.34697 & 17.99086 & 19.91171 & 0.01053 & 123.78600\\
18.33916 & 17.95949 & $\cdots$ & 0.03468 & 134.75378\\
18.38763 & 18.04212 & 19.96631 & 0.01190 & 138.58600\\
18.38510 & 18.03704 & 19.93143 & 0.01279 & 142.76500\\
18.41525 & 18.06692 & 19.93604 & 0.01870 & 155.43300\\
18.35080 & 17.99321 & $\cdots$ & 0.02762 & 156.58644\\
18.36362 & 18.00054 & $\cdots$ & 0.02009 & 158.59506\\
18.36016 & 17.99648 & $\cdots$ & 0.01003 & 160.60051\\
18.40997 & 18.07270 & 19.94891 & 0.01356 & 176.41200\\
18.39495 & 18.07015 & 19.91818 & 0.01065 & 182.41100\\
18.43531 & 18.07975 & $\cdots$ & 0.03784 & 215.53896\\
18.42154 & 18.05567 & 19.89615 & 0.01084 & 219.38300\\
18.41720 & 18.07555 & $\cdots$ & 0.03784 & 221.36005\\
18.46006 & 18.09469 & 19.93032 & 0.03836 & 227.41000\\
18.45907 & 18.11377 & 19.93880 & 0.09371 & 228.37800\\
18.40563 & 18.07210 & $\cdots$ & 0.06348 & 235.38689\\
18.40995 & 18.08187 & $\cdots$ & 0.01825 & 239.39029\\
18.45908 & 18.12662 & 19.93795 & 0.01000 & 247.42200\\
18.44071 & 18.10729 & 19.90479 & 0.01006 & 254.39000\\
18.42990 & 18.07243 & $\cdots$ & 0.09117 & 260.41507\\
18.48749 & 18.09320 & $\cdots$ & 0.06695 & 276.40500\\
\hline
\end{tabular}}
\end{table}