\begin{table}%t2 \caption{\label{om-fluxes}Fluxes in the OM filters obtained using aperture photometry.} %\centerline {\small \begin{tabular}{lcc} \hline\hline Filter & Effective wavelength & Flux \\ & (\AA) & ($10^{-14}$~\funitsa) \\ \hline $U$ & 3440 & $1.05\pm0.01$ \\ $UVW1$ & 2910 & $1.24\pm0.01$$^{a}$ \\ $UVM2$ & 2310 & $1.24\pm0.02$$^{a}$ \\ $UVW2$ & 2120 & $1.58\pm0.05$$^{a}$ \\ \hline \end{tabular}}\smallskip \par $^{a}$ Fluxes are the mean values of the two exposures on each filter. \end{table}