\begin{table}%t3 \par \caption{\label{tab:calibration}Stars used for the flux calibration of the imaging data for C~1 (Fig.~\ref{fig:chandra1Fc}).~$I$-band magnitudes are from field photometry provided by Henden (\cite{Henden2003}) and~$J$,~$H$ and~$K_{\rm s}$-band magnitudes are taken from the 2MASS All-Sky Point Source Catalog.~$^{(1)}$: no~$I$-band magnitudes available,~$^{(2)}$: no uncertainties provided by 2MASS.} %\centering \par \begin{tabular}{rcccccc} \hline\hline Star & RA (J2000) & Dec (J2000)& $I$ & $J$ & $H$ & $K_{\rm s}$ \\ & hh:mm:ss & dd:mm:ss & [mag] & [mag] & [mag] & [mag] \\ \hline A & 17:03:58.6 & --22:37:33 &~$^{(1)}$ & 14.97~$\pm$~0.03 & 14.26~$\pm$~0.05 & 14.04~$\pm$~0.05 \\ B & 17:03:59.3 & --22:37:18 & 14.60~$\pm$~0.02 & 13.37~$\pm$~0.02 & 12.64~$\pm$~0.03 & 12.46~$\pm$~0.02 \\ C & 17:04:00.3 & --22:37:06 & 16.33~$\pm$~0.10 & 15.50~$\pm$~0.07 & 14.87~$\pm$~0.08 & 14.76~$\pm$~0.11 \\ D & 17:04:02.5 & --22:37:10 &~$^{(1)}$ & 16.09~$\pm$~0.11 & 15.58~$\pm$~0.11 & 15.48~$\pm$~0.21 \\ E & 17:04:02.9 & --22:37:37 &~$^{(1)}$ & 16.57~$\pm$~0.13 & 16.15~$\pm$~0.17 & 15.76$^{(2)}$ \\ F & 17:04:02.4 & --22:37:37 &~$^{(1)}$ & 15.96~$\pm$~0.08 & 15.48~$\pm$~0.10 & 15.20~$\pm$~0.18 \\ G & 17:04:00.4 & --22:36:58 & 17.44~$\pm$~0.20 & 16.43~$\pm$~0.11 & 15.88~$\pm$~0.12 & 15.38$^{(2)}$ \\ \hline \end{tabular} \end{table}