\begin{table}%t2
\caption{IOTA calibrator stars information.}
\label{tab:calibrators}
%\centering
\par
\begin{tabular}{lcccc}
  \hline\hline
  Star                & $V$ & $H$ & Spectral & Adopted UD diameter\\
                      &   &   & Type     & [mas]\\
  \noalign{\smallskip}
  \hline
  \noalign{\smallskip}
  \object{HD~14129}  & 5.5 & 3.3 & G8.5III & $1.01 \pm 0.01$$^{a}$\\
  \object{HD~20791}  & 5.7 & 3.5 & G8.5III & $0.89 \pm 0.01$$^{a}$\\
  \object{HD~28322}  & 6.2 & 3.9 & G9III   & $0.82 \pm 0.01$$^{a}$\\
  \object{HD~34137}  & 7.2 & 4.4 & K2III   & $0.80 \pm 0.01$$^{a}$\\
  \object{HD~36134}  & 5.8 & 3.2 & K1III   & $1.16 \pm 0.02$$^{a}$\\
  \object{HD~50281}  & 6.6 & 4.3 & K3V     & $0.77 \pm 0.10$$^{b}$\\
  \object{HD~63838}  & 6.4 & 3.6 & K2III   & $0.95 \pm 0.01$$^{a}$\\
  \object{HD~74794}  & 5.7 & 3.5 & K0III   & $1.07 \pm 0.01$$^{a}$\\
  \hline
\end{tabular}
\par
\begin{flushleft}
  $^{a}$ UD diameter taken from the CHARM2 catalog~\citep{ric05}.\\
  $^{b}$ UD diameter taken from getCal tool {\tt (http://mscweb.ipac.caltech.edu/gcWeb/gcWeb.jsp)}.
\end{flushleft}
\end{table}