\begin{table}%t2 \caption{Early type calibration stars, used for the primary calibration (names, types and $K$ band magnitudes according to \cite{paumard2006}, approximate values for $T_{\rm eff}$ from {\em Allen's Astrophysical Quantities}).} \label{TableCalstars} %\centering \par \begin{tabular}{l l l l r} \hline\hline Name & ID & mag $K$ & Type & $T_{\rm eff}$\\ \hline E69 & 61 & 11.32 & early & \\ E55 & 195 & 12.45 & B0-1I & $\sim$20~000\\ E47 & 219 & 12.50 & B0-3I & $\sim$18~000\\ IRS 16SSE1 & 148 & 11.90 & O8.5-9.5I & $\sim$32~000\\ IRS 16SSE2 & 199 & 12.10 & B0-0.5I & $\sim$20~000\\ IRS 16SSW & 71 & 11.45 & O8-9.5I & $\sim$32~000\\ IRS 33N & 58 & 11.22 & B0.5-1I & $\sim$20~000\\ E22/W10 & 220 & 12.73 & O8-9.5I/III & $\sim$32~000\\ E25/W14 & 215 & 12.58 & O8.5-9.5I & $\sim$32~000\\ E43 & 126 & 12.10 & O8.5-9.5I & $\sim$32~000\\ E53 & 254 & 12.31 & B0-1I & $\sim$20~000\\ \hline \end{tabular} \end{table}