\begin{table}%t1
  \renewcommand{\arraycolsep}{1.1}
  \caption {\label{tab:cores}The sample of cores observed. Note that $\rho$Oph~D is also
    known as L~1696A.}
  %\centerline
 {\begin{tabular}{l c c c c c c c c c}\hline\hline
  \noalign{\smallskip}
    Source & $\alpha_{2000}$ & $\delta_{2000}$ & $\Delta \alpha,\Delta \delta$\tablefootmark{a} &
    $\vlsr$\tablefootmark{b} & $n(\hh)$\tablefootmark{c} & $S_{1.2~\rm mm}$ & $N(\hh)$\tablefootmark{d} & $\tkin$\tablefootmark{e}&References\\
    & & & \arcsec & \kms & $\dix{5}$~\ccc & \Mjysr & \dix{22}~\cc & K \smallskip\\\hline
    L~183 & 15:54:08.80 & --02:52:44.0 &$ (0,0)$ & 2.37 & 20 & 18.3 & 7.2 & 7.0 & (1) \\
    L~1544 & 05:04:16.90 & +25:10:47.0 &$ (0,0)$ & 7.20 & 14 & 17.2 & 6.7 & 7.0 & (2) \\
    Oph~D & 16:28:30.40 & --24:18:29.0 &$ (0,0)$ & 3.35 & 8.5 & 14.6 & 5.7 & 6.0 & (3) \\
    L~1517B & 04:55:18.80 & +30:38:03.8 &$(-10,-20)$& 5.87 & 2.2 & 7.1 & 2.8 &10.0 & (4) \\
    L~310 & 18:07:11.90 & --18:21:35.0 &$( 30, 80)$& 6.70 & 0.9 & 7.5 & 2.9 & 9.0 & (5) \\\hline
\end{tabular}}
\tablefoot {
      \tablefoottext{a}{Offsets of the continuum peak with respect to the
    reference position.}
    \tablefoottext{b}{Systemic LSR velocity.}
    \tablefoottext{c}{Peak particle number density.}
    \tablefoottext{d}{Column density computed assuming $\tdust=8$~K and
    $\kappa_\nu=0.01\rm~cm^2~g^{-1}$. The values increase by~25\% if
    $\tdust=7$~K.}}
       \tablefoottext{e}{Gas kinetic temperature from the literature.}\vspace{-2mm}
  \tablebib{ (1) \cite{pagani2004,pagani2007}, (2)
    \cite{tafalla2002}, \cite{crapsi2007}, (3)~\cite{ward1999},
    \cite{harju2008} (4)~\cite{tafalla2004} (5) \cite{bacmann2002}.}
\end{table}