\begin{table}%ta.3 %\centering \par \scriptsize \caption{\label{t:errabu}Error in element ratios due to star-to-star errors in atmospheric parameters and in the EWs.} \small \begin{tabular}{lllllrlcccl} \hline\hline &\multicolumn{6}{c}{Errors in abundances due to:} & \multicolumn{1}{c}{} &\multicolumn{2}{c}{Total star-to-star error} &\\ \cline{2-7} \cline{9-10}\\ & $T_{\rm eff}$& $\log g$ & [A/H] & $v_t$ &$\langle $nr$\rangle$ & EW & & $T_{\rm eff}$+$v_t$+EW & all &\\ $[$Fe/H$]$I & +0.004 & +0.001 & +0.003 &$-$0.039& 30 & 0.025 & & 0.046 & 0.047 &NGC 104\\ $[$Fe/H$]$II& $-$0.006 & +0.004 & +0.011 &$-$0.017& 3 & 0.078 & & 0.080 & 0.081 &\\ $[$O/Fe$]$ & $-$0.003 & +0.003 & +0.009 & +0.039& 1 & 0.135 & & 0.141 & 0.141 &\\ $[$Na/Fe$]$ & +0.001 &$-$0.002 & +0.000 & +0.010& 3 & 0.078 & & 0.079 & 0.079 &\\ %NGC 288 & & & & & & & & & &\\ $[$Fe/H$]$I & +0.007 &$-$0.002 &$-$0.002 &$-$0.076& 31 & 0.025 & & 0.080 & 0.080 &NGC 288\\ $[$Fe/H$]$II& $-$0.003 & +0.018 & +0.018 &$-$0.034& 2 & 0.098 & & 0.104 & 0.106 &\\ $[$O/Fe$]$ & $-$0.005 & +0.018 & +0.018 & +0.081& 1 & 0.138 & & 0.160 & 0.162 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.005 &$-$0.005 & +0.050& 2 & 0.098 & & 0.110 & 0.110 &\\ %NGC 1904 & & & & & & & & & &\\ $[$Fe/H$]$I & +0.006 &$-$0.002 &$-$0.004 &$-$0.054& 25 & 0.027 & & 0.061 & 0.061 &NGC 1904\\ $[$Fe/H$]$II& $-$0.002 & +0.017 & +0.006 &$-$0.016& 2 & 0.093 & & 0.094 & 0.096 &\\ $[$O/Fe$]$ & $-$0.004 & +0.018 & +0.014 & +0.058& 1 & 0.131 & & 0.143 & 0.145 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.005 &$-$0.002 & +0.042& 3 & 0.076 & & 0.087 & 0.087 &\\ %NGC 3201 & & & & & & & & & &\\ $[$Fe/H$]$I & +0.005 &$-$0.002 &$-$0.004 &$-$0.042& 28 & 0.028 & & 0.051 & 0.051 &NGC 3201\\ $[$Fe/H$]$II& $-$0.002 & +0.017 & +0.010 &$-$0.017& 2 & 0.103 & & 0.104 & 0.106 &\\ $[$O/Fe$]$ & $-$0.004 & +0.018 & +0.019 & +0.046& 1 & 0.146 & & 0.153 & 0.155 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.004 &$-$0.000 & +0.038& 2 & 0.103 & & 0.110 & 0.110 &\\ %NGC 4590& & & & & & & & & &\\ $[$Fe/H$]$I & +0.004 &$-$0.001 &$-$0.002 &$-$0.031& 12 & 0.037 & & 0.048 & 0.048 &NGC 4590\\ $[$Fe/H$]$II& $-$0.001 & +0.015 & +0.004 &$-$0.014& 1 & 0.129 & & 0.130 & 0.131 &\\ $[$O/Fe$]$ & $-$0.002 & +0.016 & +0.011 & +0.039& 1 & 0.129 & & 0.135 & 0.136 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.003 & +0.002 & +0.025& 3 & 0.074 & & 0.078 & 0.078 &\\ %NGC 5904& & & & & & & & & &\\ $[$Fe/H$]$I & +0.014 &$-$0.001 &$-$0.002 &$-$0.031& 33 & 0.024 & & 0.042 & 0.042 &NGC 5904\\ $[$Fe/H$]$II& $-$0.007 & +0.018 & +0.005 &$-$0.012& 2 & 0.098 & & 0.099 & 0.101 &\\ $[$O/Fe$]$ & $-$0.010 & +0.018 & +0.009 & +0.031& 1 & 0.139 & & 0.143 & 0.144 &\\ $[$Na/Fe$]$ & $-$0.004 &$-$0.006 &$-$0.002 & +0.021& 3 & 0.080 & & 0.083 & 0.083 &\\ %NGC 6121& & & & & & & & & &\\ $[$Fe/H$]$I & +0.004 &$-$0.001 &$-$0.001 &$-$0.037& 37 & 0.022 & & 0.043 & 0.043 &NGC 6121\\ $[$Fe/H$]$II& $-$0.003 & +0.019 & +0.006 &$-$0.003& 3 & 0.079 & & 0.079 & 0.082 &\\ $[$O/Fe$]$ & $-$0.003 & +0.018 & +0.009 & +0.008& 1 & 0.136 & & 0.136 & 0.138 &\\ $[$Na/Fe$]$ & +0.000 &$-$0.007 &$-$0.003 & +0.005& 3 & 0.079 & & 0.079 & 0.080 &\\ %NGC 6171& & & & & & & & & &\\ $[$Fe/H$]$I & +0.002 &$-$0.001 & +0.001 &$-$0.055& 37 & 0.025 & & 0.060 & 0.060 &NGC 6171\\ $[$Fe/H$]$II& $-$0.001 & +0.020 & +0.012 &$-$0.027& 2 & 0.109 & & 0.112 & 0.115 &\\ $[$O/Fe$]$ & $-$0.001 & +0.018 & +0.014 & +0.059& 1 & 0.154 & & 0.165 & 0.166 &\\ $[$Na/Fe$]$ & +0.000 &$-$0.008 &$-$0.001 & +0.032& 3 & 0.089 & & 0.095 & 0.095 &\\ %NGC 6254& & & & & & & & & &\\ $[$Fe/H$]$I & +0.004 &$-$0.002 &$-$0.005 &$-$0.023& 25 & 0.026 & & 0.035 & 0.035 &NGC 6254\\ $[$Fe/H$]$II& $-$0.001 & +0.016 & +0.007 &$-$0.008& 2 & 0.091 & & 0.091 & 0.093 &\\ $[$O/Fe$]$ & $-$0.003 & +0.018 & +0.016 & +0.026& 1 & 0.129 & & 0.132 & 0.134 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.004 & +0.000 & +0.020& 3 & 0.074 & & 0.077 & 0.077 &\\ %NGC 6388& & & & & & & & & &\\ $[$Fe/H$]$I & +0.003 & +0.007 & +0.014 &$-$0.084& 19 & 0.037 & & 0.092 & 0.093 &NGC 6388\\ $[$Fe/H$]$II& $-$0.013 & +0.025 & +0.033 &$-$0.044& 2 & 0.114 & & 0.123 & 0.130 &\\ $[$O/Fe$]$ & $-$0.001 & +0.011 & +0.014 & +0.086& 2 & 0.114 & & 0.143 & 0.144 &\\ $[$Na/Fe$]$ & +0.004 &$-$0.015 &$-$0.001 & +0.027& 3 & 0.093 & & 0.097 & 0.098 &\\ %NGC 6397& & & & & & & & & &\\ $[$Fe/H$]$I & +0.004 &$-$0.001 &$-$0.001 &$-$0.031& 16 & 0.038 & & 0.049 & 0.049 &NGC 6397\\ $[$Fe/H$]$II& $-$0.001 & +0.015 & +0.003 &$-$0.010& 1 & 0.153 & & 0.153 & 0.154 &\\ $[$O/Fe$]$ & $-$0.003 & +0.017 & +0.010 & +0.034& 1 & 0.153 & & 0.157 & 0.158 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.002 & +0.000 & +0.031& 2 & 0.108 & & 0.112 & 0.112 &\\ %NGC 6809& & & & & & & & & &\\ $[$Fe/H$]$I & +0.006 &$-$0.002 &$-$0.005 &$-$0.030& 23 & 0.027 & & 0.041 & 0.041 &NGC 6809\\ $[$Fe/H$]$II& $-$0.002 & +0.016 & +0.006 &$-$0.008& 2 & 0.091 & & 0.091 & 0.093 &\\ $[$O/Fe$]$ & $-$0.004 & +0.017 & +0.015 & +0.034& 1 & 0.128 & & 0.132 & 0.134 &\\ $[$Na/Fe$]$ & $-$0.003 &$-$0.006 &$-$0.001 & +0.024& 2 & 0.091 & & 0.094 & 0.094 &\\ %NGC 6838& & & & & & & & & &\\ $[$Fe/H$]$I & +0.005 & +0.001 & +0.002 &$-$0.032& 37 & 0.023 & & 0.040 & 0.040 &NGC 6838\\ $[$Fe/H$]$II& $-$0.004 & +0.020 & +0.011 &$-$0.016& 3 & 0.080 & & 0.082 & 0.085 &\\ $[$O/Fe$]$ & $-$0.005 & +0.017 & +0.010 & +0.033& 2 & 0.098 & & 0.104 & 0.105 &\\ $[$Na/Fe$]$ & $-$0.001 &$-$0.009 &$-$0.001 & +0.013& 3 & 0.080 & & 0.081 & 0.082 &\\ %NGC 7078& & & & & & & & & &\\ $[$Fe/H$]$I & +0.005 &$-$0.002 &$-$0.001 &$-$0.026& 13 & 0.030 & & 0.040 & 0.040 &NGC 7078\\ $[$Fe/H$]$II& $-$0.001 & +0.015 & +0.004 &$-$0.007& 1 & 0.111 & & 0.111 & 0.112 &\\ $[$O/Fe$]$ & $-$0.003 & +0.016 & +0.011 & +0.036& 1 & 0.111 & & 0.117 & 0.118 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.003 & +0.003 & +0.023& 2 & 0.078 & & 0.081 & 0.081 &\\ %NGC 7099& & & & & & & & & &\\ $[$Fe/H$]$I & +0.005 &$-$0.001 &$-$0.001 &$-$0.033& 12 & 0.034 & & 0.048 & 0.048 &NGC 7099\\ $[$Fe/H$]$II& $-$0.001 & +0.015 & +0.003 &$-$0.008& 1 & 0.119 & & 0.119 & 0.120 &\\ $[$O/Fe$]$ & $-$0.002 & +0.016 & +0.007 & +0.041& 1 & 0.119 & & 0.126 & 0.127 &\\ $[$Na/Fe$]$ & $-$0.002 &$-$0.003 & +0.001 & +0.025& 2 & 0.084 & & 0.088 & 0.088 &\\ \hline \end{tabular} \end{table}