\begin{table}%A.3
%\centering
\par
\caption{Like Table~\ref{anthracene_comparison2} for neutral pyrene 
(C$_{16}$H$_{10}$).
\label{pyrene_comparison2}}
\begin{tabular}{ccccccc}
\hline \hline \noalign{\smallskip} 
& \multicolumn{6}{c}{Integrated flux} \\
\noalign{\smallskip} \cline{2-7} \noalign{\smallskip}
& \multicolumn{2}{c}{ISRF} & \multicolumn{2}{c}{Red Rectangle}
& \multicolumn{2}{c}{IRAS~21282+5050}\\
Peak & $\sigma_{\rm lab}$ & $\sigma_{\rm th}$ & $\sigma_{\rm lab}$ & $\sigma_{\rm th}$ & $\sigma_{\rm lab}$ & $\sigma_{\rm th}$ \\
($\mu$m) & (W~sr$^{-1}$) (\%) & (W~sr$^{-1}$) (\%) & (W~sr$^{-1}$) (\%) & (W~sr$^{-1}$) (\%) & (W~sr$^{-1}$) (\%) & (W~sr$^{-1}$) (\%) \\
\hline \noalign{\smallskip}
3.25 & $8.9 \times 10^{-28}$ (21.97) & $1.1 \times 10^{-27}$ (20.58) & $1.4 \times 10^{-26}$ (19.15) & $2.7 \times 10^{-26}$ (15.10) & $8.2 \times 10^{-23}$ (24.28) & $9.0 \times 10^{-23}$ (23.97) \\
3.26 & $8.8 \times 10^{-28}$ (21.56) & $1.0 \times 10^{-27}$ (19.86) & $1.3 \times 10^{-26}$ (18.61) & $2.6 \times 10^{-26}$ (15.05) & $7.9 \times 10^{-23}$ (23.25) & $8.7 \times 10^{-23}$ (23.16) \\
3.27 & $2.4 \times 10^{-28}$ (5.91) & $2.8 \times 10^{-28}$ (5.45) & $3.6 \times 10^{-27}$ (5.05) & $6.8 \times 10^{-27}$ (3.87) & $2.2 \times 10^{-23}$ (6.42) & $2.4 \times 10^{-23}$ (6.43) \\
3.29 & $3.3 \times 10^{-29}$ (0.81) & $4.0 \times 10^{-29}$ (0.77) & $4.9 \times 10^{-28}$ (0.68) & $1.0 \times 10^{-27}$ (0.59) & $3.2 \times 10^{-24}$ (0.94) & $3.5 \times 10^{-24}$ (0.92) \\
6.26 & $5.9 \times 10^{-29}$ (1.45) & $7.7 \times 10^{-29}$ (1.49) & $1.1 \times 10^{-27}$ (1.60) & $2.8 \times 10^{-27}$ (1.57) & $4.8 \times 10^{-24}$ (1.41) & $5.5 \times 10^{-24}$ (1.46) \\
6.31 & $1.4 \times 10^{-28}$ (3.47) & $1.8 \times 10^{-28}$ (3.40) & $2.6 \times 10^{-27}$ (3.58) & $6.6 \times 10^{-27}$ (3.78) & $1.1 \times 10^{-23}$ (3.32) & $1.2 \times 10^{-23}$ (3.29) \\
6.78 & $4.2 \times 10^{-29}$ (1.03) & $5.4 \times 10^{-29}$ (1.05) & $7.9 \times 10^{-28}$ (1.10) & $2.1 \times 10^{-27}$ (1.18) & $3.4 \times 10^{-24}$ (0.99) & $3.8 \times 10^{-24}$ (1.02) \\
6.92 & $5.8 \times 10^{-30}$ (0.14) & $6.5 \times 10^{-30}$ (0.13) & $1.1 \times 10^{-28}$ (0.15) & $2.7 \times 10^{-28}$ (0.15) & $4.2 \times 10^{-25}$ (0.12) & $4.7 \times 10^{-25}$ (0.12) \\
7.01 & $1.2 \times 10^{-29}$ (0.30) & $1.7 \times 10^{-29}$ (0.34) & $2.5 \times 10^{-28}$ (0.34) & $5.9 \times 10^{-28}$ (0.34) & $1.0 \times 10^{-24}$ (0.30) & $1.1 \times 10^{-24}$ (0.30) \\
7.01 & $1.2 \times 10^{-28}$ (3.06) & $1.6 \times 10^{-28}$ (3.14) & $2.3 \times 10^{-27}$ (3.26) & $6.3 \times 10^{-27}$ (3.58) & $1.0 \times 10^{-23}$ (2.97) & $1.1 \times 10^{-23}$ (2.93) \\
7.61 & $6.6 \times 10^{-29}$ (1.62) & $8.5 \times 10^{-29}$ (1.65) & $1.3 \times 10^{-27}$ (1.77) & $3.4 \times 10^{-27}$ (1.96) & $5.3 \times 10^{-24}$ (1.55) & $5.8 \times 10^{-24}$ (1.55) \\
7.98 & $3.7 \times 10^{-29}$ (0.90) & $4.8 \times 10^{-29}$ (0.93) & $7.0 \times 10^{-28}$ (0.98) & $2.0 \times 10^{-27}$ (1.12) & $2.8 \times 10^{-24}$ (0.84) & $3.2 \times 10^{-24}$ (0.85) \\
8.42 & $9.9 \times 10^{-29}$ (2.44) & $1.3 \times 10^{-28}$ (2.59) & $2.0 \times 10^{-27}$ (2.74) & $5.4 \times 10^{-27}$ (3.08) & $7.9 \times 10^{-24}$ (2.32) & $8.8 \times 10^{-24}$ (2.34) \\
8.62 & $1.6 \times 10^{-29}$ (0.39) & $2.1 \times 10^{-29}$ (0.41) & $3.0 \times 10^{-28}$ (0.41) & $7.9 \times 10^{-28}$ (0.45) & $1.2 \times 10^{-24}$ (0.35) & $1.3 \times 10^{-24}$ (0.35) \\
9.16 & $4.5 \times 10^{-29}$ (1.10) & $5.9 \times 10^{-29}$ (1.15) & $8.8 \times 10^{-28}$ (1.23) & $2.4 \times 10^{-27}$ (1.36) & $3.6 \times 10^{-24}$ (1.05) & $3.8 \times 10^{-24}$ (1.00) \\
10.04 & $4.7 \times 10^{-30}$ (0.12) & $6.7 \times 10^{-30}$ (0.13) & $1.1 \times 10^{-28}$ (0.15) & $2.8 \times 10^{-28}$ (0.16) & $4.0 \times 10^{-25}$ (0.12) & $4.6 \times 10^{-25}$ (0.12) \\
10.25 & $2.2 \times 10^{-29}$ (0.55) & $3.2 \times 10^{-29}$ (0.62) & $4.9 \times 10^{-28}$ (0.68) & $1.3 \times 10^{-27}$ (0.72) & $1.8 \times 10^{-24}$ (0.54) & $2.0 \times 10^{-24}$ (0.52) \\
%10.47 & $1.8 \times 10^{-30}$ (0.04) & $2.2 \times 10^{-30}$ (0.04) & $4.0 \times 10^{-29}$ (0.06) & $1.1 \times 10^{-28}$ (0.06) & $1.3 \times 10^{-25}$ (0.04) & $1.7 \times 10^{-25}$ (0.05) \\
11.79 & $9.2 \times 10^{-28}$ (22.56) & $1.3 \times 10^{-27}$ (24.52) & $1.9 \times 10^{-26}$ (25.96) & $5.4 \times 10^{-26}$ (30.61) & $7.1 \times 10^{-23}$ (20.98) & $8.0 \times 10^{-23}$ (21.29)\\
12.20 & $2.4 \times 10^{-29}$ (0.59) & $3.2 \times 10^{-29}$ (0.63) & $4.9 \times 10^{-28}$ (0.69) & $1.4 \times 10^{-27}$ (0.81) & $1.8 \times 10^{-24}$ (0.54) & $2.1 \times 10^{-24}$ (0.55) \\
13.40 & $6.9 \times 10^{-29}$ (1.69) & $9.4 \times 10^{-29}$ (1.83) & $1.4 \times 10^{-27}$ (1.93) & $4.1 \times 10^{-27}$ (2.34) & $5.3 \times 10^{-24}$ (1.56) & $5.9 \times 10^{-24}$ (1.55) \\
14.06 & $2.1 \times 10^{-28}$ (5.14) & $2.9 \times 10^{-28}$ (5.59) & $4.3 \times 10^{-27}$ (6.03) & $1.3 \times 10^{-26}$ (7.19) & $1.6 \times 10^{-23}$ (4.74) & $1.8 \times 10^{-23}$ (4.82) \\
14.43 & $1.9 \times 10^{-30}$ (0.05) & $2.9 \times 10^{-30}$ (0.06) & $4.2 \times 10^{-29}$ (0.06) & $1.5 \times 10^{-28}$ (0.08) & $1.1 \times 10^{-25}$ (0.03) & $1.3 \times 10^{-25}$ (0.03) \\
%14.75 & $1.3 \times 10^{-30}$ (0.03) & $1.9 \times 10^{-30}$ (0.04) & $2.7 \times 10^{-29}$ (0.04) & $9.6 \times 10^{-29}$ (0.05) & \textemdash{} & \textemdash{} \\
$[17.26]$ & $2.0 \times 10^{-30}$ (0.05) & $3.2 \times 10^{-30}$ (0.06) & $4.5 \times 10^{-29}$ (0.06) & $1.6 \times 10^{-28}$ (0.09) & -- & -- \\
$[17.34]$ & $2.0 \times 10^{-30}$ (0.05) & $3.3 \times 10^{-30}$ (0.06) & $4.7 \times 10^{-29}$ (0.07) & $1.6 \times 10^{-28}$ (0.09) & -- & -- ~~ \\
18.20 & $1.4 \times 10^{-29}$ (0.35) & $2.0 \times 10^{-29}$ (0.40) & $3.1 \times 10^{-28}$ (0.43) & $9.4 \times 10^{-28}$ (0.53) & $1.1 \times 10^{-24}$ (0.32) & $1.2 \times 10^{-24}$ (0.32) \\
$[18.98]$ & $2.3 \times 10^{-30}$ (0.06) & $3.5 \times 10^{-30}$ (0.07) & $5.6 \times 10^{-29}$ (0.08) & $1.8 \times 10^{-28}$ (0.10) & -- & -- \\
$[19.82]$ & $2.8 \times 10^{-30}$ (0.07) & $4.3 \times 10^{-30}$ (0.08) & $6.2 \times 10^{-29}$ (0.09) & $1.9 \times 10^{-28}$ (0.11) & -- & -- \\
$[19.93]$ & $2.8 \times 10^{-30}$ (0.07) & $4.0 \times 10^{-30}$ (0.08) & $5.8 \times 10^{-29}$ (0.08) & $1.9 \times 10^{-28}$ (0.11) & -- & -- \\
20.00 & $1.3 \times 10^{-29}$ (0.33) & $1.9 \times 10^{-29}$ (0.38) & $2.9 \times 10^{-28}$ (0.40) & $9.0 \times 10^{-28}$ (0.51) & $9.9 \times 10^{-25}$ (0.29) & $1.1 \times 10^{-24}$ (0.30) \\
20.38 & $9.2 \times 10^{-30}$ (0.23) & $1.3 \times 10^{-29}$ (0.26) & $2.0 \times 10^{-28}$ (0.27) & $6.3 \times 10^{-28}$ (0.36) & $6.7 \times 10^{-25}$ (0.20) & $7.8 \times 10^{-25}$ (0.21) \\
$[21.96]$ & $3.4 \times 10^{-30}$ (0.08) & $4.7 \times 10^{-30}$ (0.09) & $7.5 \times 10^{-29}$ (0.10) & $2.3 \times 10^{-28}$ (0.13) & -- & -- \\
$[24.64]$ & $4.1 \times 10^{-30}$ (0.10) & $6.2 \times 10^{-30}$ (0.12) & $8.7 \times 10^{-29}$ (0.12) & $2.7 \times 10^{-28}$ (0.16) & -- & -- \\
$[25.27]$ & $4.4 \times 10^{-30}$ (0.11) & $6.2 \times 10^{-30}$ (0.12) & $8.8 \times 10^{-29}$ (0.12) & $2.9 \times 10^{-28}$ (0.17) & -- & -- \\
28.32 & $8.6 \times 10^{-30}$ (0.21) & $1.2 \times 10^{-29}$ (0.24) & $1.8 \times 10^{-28}$ (0.26) & $6.0 \times 10^{-28}$ (0.34) & $5.5 \times 10^{-25}$ (0.16) & $6.1 \times 10^{-25}$ (0.16) \\
$[38.63]$ & $6.6 \times 10^{-30}$ (0.16) & $1.0 \times 10^{-29}$ (0.19) & $1.4 \times 10^{-28}$ (0.20) & $4.1 \times 10^{-28}$ (0.23) & -- & -- \\
$[40.66]$ & $7.0 \times 10^{-30}$ (0.17) & $1.0 \times 10^{-29}$ (0.20) & $1.5 \times 10^{-28}$ (0.21) & $4.2 \times 10^{-28}$ (0.24) & -- & -- \\
47.80 & $1.6 \times 10^{-29}$ (0.39) & $2.4 \times 10^{-29}$ (0.46) & $3.6 \times 10^{-28}$ (0.50) & $1.2 \times 10^{-27}$ (0.66) & $1.1 \times 10^{-24}$ (0.33) & $1.3 \times 10^{-24}$ (0.33) \\
$[66.26]$ & $9.1 \times 10^{-30}$ (0.22) & $1.4 \times 10^{-29}$ (0.27) & $1.6 \times 10^{-28}$ (0.23) & $3.9 \times 10^{-28}$ (0.22) & -- & -- \\
101.60 & $1.1 \times 10^{-29}$ (0.27) & $1.7 \times 10^{-29}$ (0.32) & $2.5 \times 10^{-28}$ (0.35) & $8.6 \times 10^{-28}$ (0.49) & $8.1 \times 10^{-26}$ (0.02) & $9.0 \times 10^{-26}$ (0.02) \\
 \hline 
\end{tabular}
\end{table}