**Table 2:** Astrometric measurements of T Tau N - Sa - Sb.
$\begin{displaymath}{ \begin{tabular}{lcl@{${}\pm{}$}ll@{${}\pm{}$}lcl@{${}\pm{}$... ....0$&$0.5$ & $308.2$&$0.3$ && This work\\ \hline \end{tabular}}\end{displaymath}$ ^a Corrected value according to Duchêne et al. (2006). ^b This is a re-analysis of the data presented in Beck et al. (2004) using a more sophisticated PSF fitting routine. ^c $90^\circ$ subtracted from the position angle in Schaefer et al. (2006) to correct for the orientation of the camera (Schaefer, priv. comm.).

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