\begin{table}%t10 \caption{\label{TabPIRLines}Spectral lines used for analysis of the post-shock photoionized region. (See text for details).} %\centerline {\small \begin{tabular}{llllcl} \hline\hline Spectrum & $\lambda$ & $I/I($5007~\AA) & Source & Observed? & Application {\large\strut}\\ \hline {}\ion{He}{i} & 10~830~\AA & 0.006$^*$& GF01 & Yes?& He abundance {\large\strut} \\ {}[\ion{C}{i}] & 8727~\AA & 0.002 & HF96 & Yes & Post-shock PIR disruption \\ {}[\ion{O}{i}] & 6300 \AA & 0.08 & HF96 & Yes & C abundance \\ & 63.19~$\mu$m & 0.07 & This paper & Yes & O ionization state, electron density, \\ & & & & & extent of the post-shock PIR \\ & 145.5~$\mu$m & $<$0.0024 & This paper & No & Electron density \\ \ion{O}{i} & 7774~\AA & 0.003 & HF96 & Yes & Extent of the post-shock PIR, O ionization state, \\ & & & & & reference for line ratios \\ {}[\ion{Si}{ii}]& 34.81~$\mu$m & 0.07 & This paper & Yes & Extent of the post-shock PIR \\ {}[\ion{S}{i}] & 25.25~$\mu$m & $<$0.01 & This paper & No & S$^0$ abundance \\ {}[\ion{S}{ii}] &10~287--10~370~\AA& 0.11 & HF96, GF01 & Yes & Probable multi-$T$ structure of the post-shock PIR \\ {}[\ion{Ar}{ii}]& 6.985~$\mu$m & 0.5 & This paper & Yes & Extent of the post-shock PIR, Ar ionization state\\ {}[\ion{Fe}{ii}]& 1.2946~$\mu$m& 0.001 & GF01 & Yes & Electron density \\ & 1.3209~$\mu$m& 0.0007 & GF01 & Yes & Electron density and temperature \\ & 17.94~$\mu$m & 0.03 & This paper & Yes & Electron temperature, extent of the post-shock PIR \\ & 25.99~$\mu$m & $<$0.15 & This paper & No? & Electron temperature \\ \hline \end{tabular}} \medskip $^*$ An upper limit to the line intensity intensity (blended lines).\\ Note: references: HF96 -- \citet{HF96}, GF01 -- \citet{CasANIR01}. \end{table}