\begin{table}%tA.4 \caption{\label{tab: observation log VLA}Overview of the VLA observations.} %\centering \par \begin{tabular}{lcccccl} \hline \hline \noalign{\smallskip} Obs. date & Wavelengths & Config. & Target sources\tablefootmark{a} & Gain calibrator(s) & Flux cal. & Notes \\ & (mm) & & & & & \\ \hline 20080310 & 6.92, 6.93 & C & CoKu Ser G3, EC 82 & 1824+013 & 3c286 & Clouds forming \\ & & & 182900.88+002931.5, EC 90, VV Ser, & & & \\ & & & EC 97, 182850.20+000949.7 & & & \\ 20080311 & 13.4 & C & CoKu Ser G3, 182900.88+002931.5, & 1851+005 & 3c286 & Clear sky \\ & & & EC 90, VV Ser, EC 97 & & & \\ 20080313 & 13.4 & C & 182850.20+000949.7, & 1851+005 & 3c286 & Clouds forming \\ & & & 182909.80+003445.9, EC 82 & & & \\ 20080314 & 35.5 & C & EC 82, EC 90, 182950.20+000949.7, & 1804+010 & 3c286 & Clear sky; high winds \\ & & & EC 97, VV Ser, & & & \\ & & & CoKu Ser G3, 182900.88+002931.5, & & & \\ 20080315 & 61.4, 62.0 & C & EC 82, EC 90, 182950.20+000949.7, & 1804+010 & 3c286 & Clear sky; high winds \\ & & & EC 97, & & & \\ & & & CoKu Ser G3, 18290088+0029315, & & & \\ & & & VV Ser, 18285020+0009497 & & & \\ \hline \end{tabular} \tablefoot {\tablefoottext{a}{In the case of SSTc2d names, only the coordinates (in~J2000) are~shown.}} \end{table}