\begin{table}%t3 \caption{\label{cal_vinci}Calibrators used for the VINCI observations of Betelgeuse. } \small%%\centerline { \begin{tabular}{r l l l} \hline\hline Name & Sp.Type & $d_{\rm UD}$ (mas) & Night \\ \hline \object{$\varepsilon$ Peg} & K2Ib & $7.70 \pm 0.24$ & 2001 Oct. 12 (4)\\ \object{$\beta$ Cet} & G9II-III & $5.18 \pm 0.05$ & 2001 Oct. 12 (6)\\ & & & 2002 Dec. 06 (2)\\ \object{$\varepsilon$ Lep} & K4III & $5.90 \pm 0.06$ & 2001 Oct. 12 (3)\\ & & & 2002 Dec. 06 (1)\\ & & & 2003 Jan. 09 (1)\\ \object{Sirius} & A1V & $5.60 \pm 0.15$ & 2001 Oct. 12 (4)\\ & & & 2002 Dec. 06 (1)\\ & & & 2003 Jan. 07 (1)\\ & & & 2003 Jan. 18 (6)\\ \object{$\delta$ CMa} & F8Iab & $3.29 \pm 0.46 $ & 2001 Oct. 12 (2)\\ & & & 2003 Jan. 07 (1)\\ \object{$\pi$ Eri} & M1III & $4.8 \pm 0.5 $ & 2002 Dec. 06 (1)\\ \object{$\tau$ Pup} & K1III & $4.38 \pm 0.07$ & 2002 Dec. 06 (1)\\ & & & 2003 Jan. 09 (1)\\ \object{Procyon} & F5IV-V & $5.37 \pm 0.11 $ & 2002 Dec. 06 (1)\\ & & & 2003 Jan. 07 (1)\\ \object{1 Pup} & K5III & $3.8 \pm 0.4 $ & 2002 Dec. 06 (1)\\ \object{$\chi$ Phe} & K5III & $2.69 \pm 0.03 $ & 2002 Dec. 06 (1)\\ \object{$\iota$ Cet} & K1.5III & $3.28 \pm 0.04$ & 2003 Jan. 07 (1)\\ \object{31 Ori} & K5III & $3.55 \pm 0.06$ & 2003 Jan. 07 (1)\\ \object{$\theta$ CMa} & K4III & $4.13 \pm 0.4$ & 2003 Jan. 07 (1)\\ \object{$\beta$ Cnc} & K4III & $4.88 \pm 0.03$ & 2003 Jan. 07 (1)\\ & & & 2003 Jan. 09 (2)\\ \object{$\zeta$ Hya} & G9II-III & $3.1 \pm 0.2$ & 2003 Jan. 07 (1)\\ & & & 2003 Jan. 09 (1)\\ \object{$\alpha$ Hya} & K3II-III & $9.44 \pm 0.9$& 2003 Jan. 07 (1)\\ & & & 2003 Jan. 09 (6)\\ & & & 2003 Jan. 13 (6)\\ \object{$\iota$ Hya} & K2.5III & $3.41 \pm 0.05$& 2003 Jan. 07 (2)\\ & & & 2003 Jan. 09 (4)\\ & & & 2003 Jan. 13 (4)\\ \object{$\mu$ Hya} & K2.5III & $4.69 \pm 0.5$ & 2003 Jan. 09 (3)\\ & & & 2003 Jan. 13 (9)\\ & & & 2003 Jan. 15 (2)\\ \object{$\gamma^1$ Leo} & K1IIIb & $7.70 \pm 0.70$ & 2003 Jan. 09 (3)\\ \object{$\beta$ Ori} & B8Iab & $2.43 \pm 0.05$ & 2003 Jan. 13 (16)\\ & & & 2003 Jan. 14 (22)\\ & & & 2003 Jan. 15 (15)\\ \object{V337 Car} & K3IIa & $5.09 \pm 0.06$ & 2003 Jan. 14 (6)\\ \object{N Vel} & K5III & $6.92 \pm 0.08$ & 2003 Jan. 07 (1)\\ \hline \end{tabular}} \smallskip Note: Uniform-disk diameters ($d_{\rm UD}$) are taken from Richichi \& Percheron (\cite{richichi05}). The number of the observations of the individual calibrators on each night is indicated in parenthesis. \end{table}