\begin{table}%t1 %\centering \par \caption{\label{tab:epoch_list}Journal of VLBA $\lambda$2~cm observations of M~87\tablefootmark{a}.} \begin{tabular}{ccccccccccccc} \hline\hline \noalign{\smallskip} & Exp.\ & $t_{\rm int}$ & $N_{{\rm ant}}$ & \multicolumn{2}{c}{Beam\tablefootmark{c}} & $S^{{\rm VLBA,M87}}_{\rm total}$ & $S^{{\rm M87}}_{\rm peak,A}$ & $S^{{\rm HST-1}}_{\rm total}$ & $S^{\rm HST-1}_{\rm peak,A}$ & $S^{\rm HST-1}_{\rm peak,B}$ & rms$_{\rm A}$\tablefootmark{d} & rms$_{\rm B}$\tablefootmark{d} \\ Epoch & Code & \scriptsize{[min]} & & \scriptsize{size[mas]} & $\phi$\scriptsize{[degree]} & \scriptsize{[Jy]} & \scriptsize{[Jy~beam$^{-1}$]} & \scriptsize{[mJy]} & \scriptsize{[mJy~beam$^{-1}$]} & \scriptsize{[mJy~beam$^{-1}$]} & \scriptsize{[$\mu$Jy~beam$^{-1}$]} & \scriptsize{[$\mu$Jy~beam$^{-1}$]} \\ \hline\\[-3.25mm] 2000.06 & \texttt{BK073A}\tablefootmark{e,f} & 476& 11 & $2.07\times 1.35$ & $-7$& 2.26 & 1.24 & $<$1.36 & $<$0.26 & $<$0.23 & 79 & 68 \\ 2000.35 & \texttt{BK073B}\tablefootmark{e,f} & 476& 11 & $1.88\times 1.31$ & $-13$ & 2.33 & 1.29 & $<$1.42 & $<$0.20 & $<$0.21 & 70 & 71 \\ 2000.99 & \texttt{BK073C}\tablefootmark{e,f} & 476&10\tablefootmark{j} & $2.12\times 1.52$ & $-3$ & 2.46 & 1.33 & $<$1.84 & $<$0.25 & $<$0.33 & 100 & 92 \\ 2001.99 & \texttt{BR077D}\tablefootmark{g,h} & 68 &10 & $1.74 \times 1.09$ & $-8$ & 2.74 & 1.42 &$<$5.24 &$<$0.66 &$<$0.70 & 212 & 262 \\ 2002.25 & \texttt{BR077J}\tablefootmark{g,h} & 57 &10 & $1.77 \times 1.13$ & $-6$ & 2.54 & 1.40 &$<$5.84 &$<$0.80 &$<$0.81 & 300 & 292 \\ 2003.09 & \texttt{BL111E}\tablefootmark{g} & 54 &10 & $1.85 \times 1.30$ & $-8$ & 2.85 & 1.57 & 3.98 & 1.01 & 2.13 & 218 & 206 \\ 2004.61 & \texttt{BL111N}\tablefootmark{g} & 63 &10 & $1.88\times 1.16$ & $-11$ & 2.32 & 1.27 & 22.03 & 4.14 & 8.76 & 198 & 210 \\ 2004.92 & \texttt{BL111Q}\tablefootmark{g} & 64 &10 & $1.95 \times 1.23$ & $-14$ & 2.41 & 1.39 & 23.59 & 2.70 & 9.97 & 223 & 295 \\ 2005.30 & \texttt{BL123E}\tablefootmark{g} & 63 & 9\tablefootmark{k} & $2.06\times 1.37$ & $-16$ & 2.35 & 1.37 & 19.72 & 2.57 & 7.03 & 237 & 226\\ 2005.85 & \texttt{BL123P}\tablefootmark{g} & 63 &10 & $2.11\times 1.25$ & $-17$ & 2.39 & 1.31 & 19.93 & 3.67 & 9.53 & 188 & 208 \\ 2006.45 & \texttt{BL137F}\tablefootmark{g} & 22 &10 & $1.85 \times 1.22$ & $-10$ & 2.51 & 1.51 &$<$6.96 &$<$1.02 &$<$1.44 & 295 & 348 \\ 2007.10 & \texttt{BL137N}\tablefootmark{g} & 42 &10 & $1.95\times 1.23$ & $-13$ & 2.67 & 1.53 & 10.49 & 1.14 & 2.94 & 201 & 255 \\ 2007.42 & \texttt{BL149AA}\tablefootmark{g} & 45 &10 & $1.78 \times 1.25$ & $-8$ & 2.69 & 1.46 &$<$7.70 &$<$0.81 &$<$1.13 & 272 & 385 \\ 2008.33 & \texttt{BL149AO}\tablefootmark{e} & 41 & 9\tablefootmark{j} & $1.77 \times 1.10$ & $-7$ & 3.24 & 1.79 &$<$3.22 &$<$0.54 &$<$0.75 & 193 & 161 \\ 2009.10 & \texttt{BL149BG}\tablefootmark{i} & 50 & 9\tablefootmark{l} & $2.25\times 1.52$ & $-12$ & 1.99 & 1.13 &$<$5.26 & $<$0.36 &$<$ 0.49 & 223 & 263 \\ \hline \end{tabular} \tablefoot{ \tablefoottext{a}{Observations are in dual-polarization mode, except as indicated.} \tablefoottext{b}{Total scheduled VLBI on-source time.} \tablefoottext{c}{Beam A: natural weighting and tapering of Gaussian full-width half maximum 0.3 at 200~M$\lambda$.} \tablefoottext{d}{Root-mean-square image noise using natural weighting and tapering with a Gaussian factor of 0.3 at a radius of 200~M$\lambda$.} \tablefoottext{e}{Recording rate: 256~Mbit~s$^{-1}$, 2 bits per sample.} \tablefoottext{f}{Dedicated full-track experiment on M~87 (see \citealt{kovalev07}); the array included a single VLA antenna (Y1).} \tablefoottext{g}{Recording rate: 128~Mbit~s$^{-1}$, 1 bit per sample.} \tablefoottext{h}{Single polarization hand (LL) observations only.} \tablefoottext{i}{Recording rate: 512 Mbit~s$^{-1}$, 2 bits per sample.} \tablefoottext{j}{Antenna NL missing.} \tablefoottext{k}{Antenna SC missing.} \tablefoottext{l}{Antenna HN missing.}} \end{table}