\begin{table}%t5
%\centering
\par
\caption{\label{tab:flux_rel}Linear fit coefficients for each flux-flux relationship.}
\begin{tabular}{l l c c c}
\hline\hline \noalign{\smallskip}
$\log F_{\rm 1}$ & $\log F_{\rm 2}$ & $c_{\rm 1}$ & $c_{\rm 2}$ & $R$ \\
\hline
\noalign{\smallskip}
\ion{Ca}{ii} H & \ion{Ca}{ii} K & --0.16 $\pm$ 0.20 & 1.01 $\pm$ 0.03 & 0.897\\
 \ion{Ca}{ii} H & H$\alpha$ & 1.95 $\pm$ 0.29 & 0.69 $\pm$ 0.05 & 0.736\\
 H$\alpha$  & \ion{Ca}{ii} K & --0.14 $\pm$ 0.44 & 0.95 $\pm$ 0.08 & 0.775\\
\ion{Ca}{ii}IRT {\tiny ($\lambda$8498~\AA)} & \ion{Ca}{ii} IRT {\tiny ($\lambda$8542~\AA)}& --0.15 $\pm$ 0.16 & 1.01 $\pm$ 0.03 & 0.894\\
 H$\alpha$  & \ion{Ca}{ii} IRT {\tiny ($\lambda$8542~\AA)} & --0.06 $\pm$ 0.29 & 0.98 $\pm$ 0.05 & 0.818\\
 \ion{Ca}{ii} H & \ion{Ca}{ii}IRT  {\tiny ($\lambda$8542~\AA)} & 1.27 $\pm$ 0.30 & 0.80 $\pm$ 0.05 & 0.830\\
 \ion{Ca}{ii} (H + K) & \ion{Ca}{ii} IRT ({\tiny $\lambda$8498 \AA + $\lambda$8542~\AA +$\lambda$8662~\AA})
& 1.30 $\pm$ 0.32 & 0.80 $\pm$ 0.05 & 0.852\\
 \ion{Ca}{ii} (H + K) & H$\alpha$ & 2.37 $\pm$ 0.30 & 0.68 $\pm$ 0.06 & 0.748\\
\hline
\end{tabular}
\vspace{1mm}
\end{table}