\begin{table}%t2 %\centering \par \caption{\label{observations}The observations.} \begin{tabular}{*{11}{c}} \hline\hline \noalign{\smallskip} & \multicolumn{4}{c}{Observation} & Predicted & \multicolumn{5}{c}{Results\tablefootmark{a}} \\ Star & & & integration & & stellar & Flux, & Total & stats. & \multicolumn{2}{c}{Background limit} \\ name & Filter & $\lambda$, ~$\mu$m & time, s & Instrument & flux, mJy\tablefootmark{*} & mJy & err., mJy & err., mJy & mJy\tablefootmark{b} & Spc. Type\tablefootmark{c}\\ \hline HD 3003 & $N9.8$ & 9.56 & 1800 & TIMMI2 & 426 & 481 & 87 & 17 & $\le$46 & M3.5V \\ & $N12.9$ & 12.21 & 3600 & TIMMI2 & 262 & 436 & 64 & 10 & $\le$27 & \\ & $Q2$ & 18.75 & 3100 & TIMMI2 & 112 & 206 & 140 & 44 & $\le$148 &\\ & $Si-5$ & 11.66 & 3400 & TReCS & 288 & 375 & 34 & 4 & $\le$10 & \\ & $Q2$ & 18.72 & 2400 & VISIR & 113 & 244 & 27 & 9 & $\le$21 & \\ %\hline HD 23281 & $N12.9$ & 12.21 & 3200 & TIMMI2 & 243 & 339 & 57 & 10 & $\le$27 & M5V \\ & $SiC$ & 11.85 & 3600 & VISIR & 258 & 252 & 13 & 2 & $\le$4 & \\ & $Q2$ & 18.72 & 3800 & VISIR & 104 & 129 & 9 & 6 & $\le$13 & \\ %\hline HD 23432 & $N7.9$ & 7.77 & 1800 & TIMMI2 & 299 & 452 & 192 & 192 & $\le$351 & A6V\\ & $N11.9$ & 11.59 & 1800 & TIMMI2 & 136 & 141 & 62 & 14 & $\le$44& \\ %\hline HD 31295 & $N1$ & 8.60 & 1800 & TIMMI2 & 648 & 851 & 77 & 13 & $\le$33& M3V \\ %\hline HD 38206 & $N9.8$ & 9.56 & 1800 & TIMMI2 & 204 & 196 & 48 & 16 & $\le$ 44 & G3.5V\\ %\hline $\lambda$ Gem & $N1$ & 8.60 & 1800 & TIMMI2 & 2244 & 1997 & 167 & 22 & $\le$56 & M5.5V \\ Chop PA & $SiC$ & 11.85 & 540 & VISIR & 1195 & 701 & 9 & 4 & $\le$7 & \\ 268$^\circ$ & Q2 & 18.72 & 1880 & VISIR & 484 & 590 & 71 & 6 & $\le$14 & \\ Binary & $N1$ & 8.60 & 1800 & TIMMI2 & 101 & 68 & 8 & & -- & \\ Chop PA & $SiC$ & 11.85 & 540 & VISIR & 54 & 46 & 4 & & -- & \\ 268$^\circ$ & $Q2$ & 18.72 & 1800 & VISIR & 22 & 31 & 17 & & -- & \\ %\hline HD 71155 & $N2$ & 10.68 & 3060 & TIMMI2 & 850 & 1278 & 215 & 36 & $\le$98 & K4.5V \\ & $Si-5$ & 11.60 & 1410 & MICHELLE & 722 & 1050 & 115 & 12 & $\le$32 & \\ & $Qa$ & 18.50 & 2100 & MICHELLE & 286 & 398 & 99 & 13 & $\le$38& \\ & $Q2$ & 18.72 & 3600 & VISIR & 280 & 380 & 36 & 7 & $\le$16 & \\ %\hline HD 75416 & $N11.9$ & 11.59 & 1800 & TIMMI2 & 144 & 204 & 88 & 15 & $\le$48 & F0V \\ %\hline HD 80950 & $N11.9$ & 11.59 & 3600 & TIMMI2 & 129 & 175 & 16 & 10 & $\le$25 & K4.5V \\ & $SiC$ & 11.85 & 1800 & VISIR & 124 & 120 & 23 & 3 & $\le$7 & \\ & $Q2$ & 18.72 & 3760 & VISIR & 50 & 119 & 11 & 9 & $\le$20 & \\ %\hline HD 141795 & $N12.9$ & 12.21 & 1200 & TIMMI2 & 1115 & 1138 & 119 & 19 & $\le$49 & M4.5V \\ & $Qa$ & 18.50 & 1900 & MICHELLE & 491 & 511 & 39 & 3 & $\le$8 &\\ %\hline $\eta$ Tel & $N12.9$ & 12.21 & 2500 & TIMMI2 & 254 & 351 & 23 & 10 & $\le$25 & $K2V$ \\ & $Q2$ & 18.75 & 1800 & TIMMI2 & 109 & 391 & 182 & 43 & $\le$136& \\ \hline \end{tabular} \tablefoot{\tablefoottext{*}{The expected photospheric emission is determined by a Kurucz model profile appropriate to the spectral type of the star and scaled to the $K$ band 2MASS magnitude as outlined in Sect.~2 unless otherwise stated in the individual source description. Errors are 1$\sigma$. $M$~band TIMMI2 observations were largely non-photometric and primarily used to improve pointing accuracy and thus are not listed in this Table.} \tablefoottext{a}{Errors are total errors (inclusive of calibration uncertainty and image noise); $^b$~limits are 3$\sigma$ upper limit to undetected object including calibration errors, or scaled to IRAS fluxes when conditions were non-photospheric. These limits are valid to within 28\arcsec\ of the detected source for TIMMI2 observations, 12\farcs6 for MICHELLE, 8\farcs1 for TReCS, and 11\farcs4 of the source for VISIR observations; $^c$~the hottest spectral type of main-sequence star equidistant with the target that would have remained undetected within our field of view. See Sect.~3.2 for details of this limit.}} \end{table}