Latex Code:
\begin{deluxetable}{cccccccc}
\tabletypesize{\footnotesize}
\tablecolumns{8}
\tablewidth{0pt}
\tablecaption{ Cross-correlation Fit Details
\label{tab:lumresults1}}
\tablehead{
\colhead{QSO} \vspace{-0.2cm}& \colhead{$R$ Range} & & & & &\colhead{Separation} & \colhead{Result}\\ \vspace{-0.2cm}
& & \colhead{$\langle f \rangle$} & \colhead{$r_0$} & \colhead{$\gamma$}& $W$ & & \\
\colhead{Division} & \colhead{(Mpc/h)} & \colhead{} & \colhead{} & \colhead{}&& \colhead{(\%)} & \colhead{Strength}}
\startdata
\vspace{-0.2cm} \nicefrac{1}{3} Bright & & $4.24 \cdot 10^{-4}$ & 6.19 && 96.97 & &\\ \vspace{-0.2cm}
& [0.3,3] & & & 1.77 & & 96.7 & 1.9$\sigma$ \\
\nicefrac{2}{3} Dim & & $4.26 \cdot 10^{-4}$ & 4.48 & & 52.77
\enddata
\vspace{-0.8cm}
\tablecomments{Luminosity dependent quasar clustering using a cross-correlation technique between CS82 galaxies ($M < 23.5$) and SDSS, BOSS, and 2SLAQ quasars \hbox{($0.5$)}}
\end{deluxetable}
Note that you need the file deluxetable.sty from here.