\begin{table}%T6
\caption{\label{tab:diam}Coefficients and range of applicability of the angular
  diameter calibrations.}
\small%\centering
\par
\begin{tabular}{lccccc}
\hline\hline\noalign{\smallskip}
Colour & Colour range & $c_0$ & $c_1$ & $N$ & $\sigma(\%)$ \\
\noalign{\smallskip}\hline 
$V-J$     & $[0.73,2.44]$ & $0.00015$ & $4.65293$ & 394 & 2.2\\
$V-H$     & $[0.88,3.01]$ & $0.00004$ & $4.15613$ & 389 & 1.8\\
$V-K_{\rm S}$   & $[0.93,3.15]$ & $0.00020$ & $4.05037$ & 394 & 1.9\\
$V_{\rm T}-J$   & $[0.72,2.56]$ & $0.00218$ & $4.44568$ & 270 & 2.1\\
$V_{\rm T}-H$   & $[0.87,3.14]$ & $0.00227$ & $3.98945$ & 255 & 1.5\\
$V_{\rm T}-K_{\rm S}$ & $[0.92,3.27]$ & $0.00286$ & $3.88433$ & 268 & 1.5\\
\hline
\end{tabular}
\tablefoot{$N$ is the number of stars employed for the fit after the $3 \sigma$
clipping and $\sigma(\%)$ is the standard deviation of the calibrations.}
\end{table}