\begin{table}%tb6 \par \caption{\label{tab:pg1247data}Photometric data for PG~1247+267.} \small%\centering \par \begin{tabular}{llll} \hline\hline\noalign{\smallskip} $\nu$ (Hz) & $F_{\nu}$ (Jy) & Error (Jy) & Ref. \\ \hline\noalign{\smallskip} $1.49\times10^{9}$ & $1.17\times10^{-3}$ & ... & {VLA (NED)} \\ $4.90\times10^{9}$ & $7.20\times10^{-4}$ & $8.00\times10^{-5}$ & {VLA (NED)} \\ $1.49\times10^{10}$ & $1.51\times10^{-3}$ & $2.20\times10^{-4}$ & {VLA (NED)} \\ $2.30\times10^{11}$ & $2.10\times10^{-3}$ & ... & {IRAM (NED)} \\ $1.72\times10^{12}$ & $1.50\times10^{-1}$ & ... & {ISO (NED)} \\ $2.93\times10^{12}$ & $1.74\times10^{-1}$ & $3.48\times10^{-2}$ & {ISO (NED)} \\ $4.93\times10^{12}$ & $2.36\times10^{-1}$ & $4.72\times10^{-2}$ & {ISO (NED)} \\ $1.20\times10^{13}$ & $1.13\times10^{-1}$ & ... & {IRAS (NED)} \\ $2.34\times10^{13}$ & $3.00\times10^{-2}$ & $6.00\times10^{-3}$ & {ISO (NED)} \\ $3.91\times10^{13}$ & $1.00\times10^{-2}$ & $2.00\times10^{-3}$ & {ISO (NED)} \\ $6.17\times10^{13}$ & $9.00\times10^{-3}$ & ... & {ISO (NED)} \\ $1.39\times10^{14}$ & $3.55\times10^{-3}$ & $1.36\times10^{-4}$ & {2MASS} \\ $1.80\times10^{14}$ & $2.99\times10^{-3}$ & $1.45\times10^{-4}$ & {2MASS} \\ $2.43\times10^{14}$ & $2.93\times10^{-3}$ & $1.10\times10^{-4}$ & {2MASS} \\ $3.33\times10^{14}$ & $6.31\times10^{-3}$ & $1.74\times10^{-3}$ & {SSS} \\ $3.28\times10^{14}$ & $3.01\times10^{-3}$ & $1.37\times10^{-5}$ & {SDSS-DR5} \\ $3.93\times10^{14}$ & $2.66\times10^{-3}$ & $9.69\times10^{-6}$ & {SDSS-DR5} \\ $4.28\times10^{14}$ & $4.03\times10^{-3}$ & $1.11\times10^{-3}$ & {SSS} \\ $4.81\times10^{14}$ & $2.26\times10^{-3}$ & $8.02\times10^{-6}$ & {SDSS-DR5} \\ $6.28\times10^{14}$ & $2.13\times10^{-3}$ & $6.42\times10^{-6}$ & {SDSS-DR5} \\ $6.81\times10^{14}$ & $3.54\times10^{-3}$ & $1.30\times10^{-3}$ & {SSS} \\ $8.47\times10^{14}$ & $2.27\times10^{-3}$ & $9.92\times10^{-6}$ & {SDSS-DR5} \\ $9.67\times10^{14}$ & $1.17\times10^{-3}$ & $8.00\times10^{-6}$ & {\XMM-OM} \\ $1.25\times10^{15}$ & $6.70\times10^{-4}$ & $2.00\times10^{-5}$ & {\XMM-OM} \\ $1.48\times10^{15}$ & $3.70\times10^{-4}$ & $2.00\times10^{-5}$ & {\XMM-OM} \\ \hline \end{tabular} \vspace*{4mm} \end{table}