\begin{table}%t3
\caption{\label{t:diffe}Average residuals with respect to the mean [Fe/H] for clusters with
metallicities $-1.4<[$Fe/H$]<-0.7$~dex.}
\small%\centering
\par
\begin{tabular}{rrcl}
\hline\hline\noalign{\smallskip}
$M_K^0$ bin & stars& $\langle[$Fe/H]$_{\rm star} -[$Fe/H]$_{\rm GC}\rangle $ & rms \\
\noalign{\smallskip}\hline
                 & \multicolumn{3}{c}{GIRAFFE} \\
$+0.0 \div -1.0$ &  97 &$ +0.006\pm 0.004$& 0.035 \\
$-1.0 \div -2.0$ & 271 &$ +0.003\pm 0.002$& 0.033 \\
$-2.0 \div -3.0$ & 155 &$ -0.009\pm 0.003$& 0.038 \\
$-3.0 \div -4.0$ &  81 &$ +0.004\pm 0.006$& 0.065 \\
$-4.0 \div -5.0$ &  56 &$ -0.012\pm 0.006$& 0.043 \\
                 & \multicolumn{3}{c}{UVES} \\
$-1.5 \div -3.0$ & 16 &$+0.008\pm 0.014$& 0.056 \\
$-3.0 \div -4.0$ & 15 &$-0.004\pm 0.008$& 0.051 \\
$-4.0 \div -5.5$ & 30 &$-0.001\pm 0.010$& 0.058 \\
\hline 
\end{tabular}
\end{table}