\begin{table}%t3 \caption{\label{tab3}Search for debris disks around nearby M-dwarfs with our new MAMBO-2 data.} %\centerline {\begin{tabular}{l|lccccccc} \hline\hline\ Name & Spectral & $D$ & Gal.~l. & Integration & Map rms & Mean brightness & $\mu/\sigma_{\mu}$ & $3\sigma$ flux density \\ & type & (pc) & ($^{\circ}$) & time & (mJy/$11''$~beam) & $\mu \pm \sigma_{\mu}$ & (2) & upper limit (1.2~mm) \\ & & & & (h) & & (mJy/$11''$~beam) & & (mJy) \\ & & & & & (1) & (2) & & (3) \\ \hline\ GJ699 & M4.0 & 1.82 & 14 & 1.5 & 1.22 & $-0.03$ $\pm$ 0.08 & $-0.36$ & $<$7.9 \\ GJ406 & M6.0 & 2.38 & 56 & 2.5 & 0.99 & $-0.18$ $\pm$ 0.08 & $-2.29$ & $<$4.9 \\ GJ411 & M2.0 & 2.54 & 65 & 6.5 & 0.67 & 0.06 $\pm$ 0.06 & 0.97 & $<$3.1 \\ GJ905 & M5.5 & 3.16 & $-17$ & 0.5 & 2.30 & 0.09 $\pm$ 0.24 & 0.38 & $<$8.6 \\ GJ447 & M4.0 & 3.34 & 59 & 1.5 & 1.19 & $-0.09$ $\pm$ 0.13 & $-0.69$ & $<$4.2 \\ GJ725(*) & M3+M3.5 & 3.57 & 24 & 1.0 & 1.44 & 0.29 $\pm$ 0.17 & 1.69 & $<$4.7 \\ GJ1111 & M6.5 & 3.62 & 32 & 1.0 & 1.75 & 0.09 $\pm$ 0.20 & 0.44 & $<$5.7 \\ GJ54.1 & M4.5 & 3.72 & $-79$ & 1.5 & 1.49 & $-0.33$ $\pm$ 0.18 & $-1.86$ & $<$4.7 \\ GJ273 & M3.5 & 3.79 & 10 & 0.5 & 2.13 & 0.17 $\pm$ 0.25 & 0.68 & $<$6.6 \\ GJ234 & M4.5+M8 & 4.12 & $-6$ & 2.5 & 1.03 & 0.30 $\pm$ 0.13 & 2.23 & $<$2.9 \\ GJ83.1 & M4.5 & 4.44 & $-46$ & 1.5 & 1.40 & $-0.37$ $\pm$ 0.18 & $-2.11$ & $<$3.7 \\ GJ687 & M3.0 & 4.53 & 32 & 4.0 & 0.76 & 0.25 $\pm$ 0.11 & 2.18 & $<$2.9 \\ LHS292 & M6.5 & 4.54 & 41 & 0.5 & 2.29 & $-0.35$ $\pm$ 1.52 & $-0.23$ & $<$5.9 \\ GJ1002 & M5.5 & 4.69 & $-69$ & 0.5 & 2.23 & 0.14 $\pm$ 0.33 & 0.43 & $<$5.6 \\ GJ412 & M2+M6 & 4.83 & 63 & 0.5 & 2.26 & $-0.21$ $\pm$ 0.36 & $-0.58$ & $<$5.4 \\ GJ388 & M3.0 & 4.89 & 54 & 5.0 & 0.73 & 0.20 $\pm$ 0.06 & 3.25 & $<$1.8 \\ GJ445 & M3.5 & 5.38 & 38 & 1.0 & 1.55 & 0.05 $\pm$ 0.28 & 0.18 & $<$3.4 \\ LHS1723 & M4.5 & 5.43 & $-27$ & 0.5 & 2.23 & 0.49 $\pm$ 0.42 & 1.17 & $<$4.8 \\ GJ526(**) & M1.5 & 5.43 & 72 & 16.0 & 0.58 & $-0.02$ $\pm$ 0.12 & $-0.16$ & $<$1.4 \\ GJ251 & M3.0 & 5.57 & 15 & 1.0 & 1.54 & 0.14 $\pm$ 0.29 & 0.48 & $<$1.7 \\ GJ205 & M1.5 & 5.71 & $-19$ & 1.0 & 1.86 & $-1.09$ $\pm$ 0.37 & $-2.93$ & $<$2.0 \\ GJ213 & M4.0 & 5.87 & $-9$ & 0.5 & 2.19 & $-0.31$ $\pm$ 0.44 & $-0.70$ & $<$2.4 \\ GJ908 & M1.0 & 5.93 & $-57$ & 0.5 & 2.01 & 0.24 $\pm$ 0.39 & 0.61 & $<$2.2 \\ GJ581 & M3 & 6.27 & 40 & 0.5 & 1.96 & $-0.75$ $\pm$ 0.43 & $-1.75$ & $<$2.1 \\ GJ625 & M1.5 & 6.58 & 43 & 5.0 & 0.69 & 0.38 $\pm$ 0.15 & 2.53 & $<$0.7 \\ GJ408 & M2.5 & 6.62 & 64 & 2.0 & 1.13 & 0.42 $\pm$ 0.14 & 3.05 & $<$1.2 \\ GJ109 & M3.5 & 7.55 & $-31$ & 3.0 & 0.98 & 0.32 $\pm$ 0.22 & 1.48 & $<$1.1 \\ GJ102 & M4 & 7.75 & $-32$ & 0.5 & 2.20 & $-0.09$ $\pm$ 0.60 & $-0.15$ & $<$2.4 \\ GJ4247 & M4 & 8.96 & $-21$ & 3.5 & 0.74 & 0.63 $\pm$ 0.25 & 2.56 & $<$0.8 \\ GJ569 (*) & M2.5+M8.5 & 9.81 & 59 & 2.0 & 1.09 & $-0.46$ $\pm$ 0.37 & $-1.25$ & $<$1.2 \\ \hline \end{tabular}} \medskip \par (1) rms estimated for $r < 60''$ in the map; (2) mean brightness and uncertainty of mean computed by averaging intensities over an effective disk of radius 60~AU; (3) the $3\sigma$ flux density upper limit is computed also over the same effective area (radius~=~60~AU). {\bf (*)}: background sources in map (see Table 2); {\bf (**)}: possibly a large debris disk (see Fig.~\ref{fig1} and Sect.~4.1.3). \end{table}