\begin{table}%t4
\par
\caption{\label{irac}IRAC photometry of 2MASS J17312974+2721233.}             % title of Table
%\centering
                          % used for centering table
\begin{tabular}{l c}        % centered columns (4 columns)
\hline\hline                 % inserts double horizontal lines
Wavelength  & Flux \\
(micron) & (mJy) \\
\hline                        % inserts single horizontal line
3.6 & $21.82\pm0.02$ \\
4.5 & $14.16\pm0.02$ \\
5.8 & $11.30\pm0.06$ \\
8.0 & $6.91\pm0.03$ \\
\hline                                   %inserts single line
\end{tabular}
\vspace{-2mm}\end{table}