\begin{table}%t4
\caption{\label{tab4}Central star magnitude, temperature and luminosity.}
\small%\centering
\par
\begin{tabular}{l c c c c c c c c  c  c  c c c}
 \hline
\hline\noalign{\smallskip}
PNe & $m_{V}$ & C & Ref. & $T_{\rm Z}$(H) &$T_{\rm Z}$(HeII) &$T_{\rm EB}$ &$T_{\rm eff}$ &H$\beta$ & dist & $R_{\rm S}$/$R_{\odot}$ &    &$L_{\rm S}$/$L_{\odot}$& \\
    & meas. &  (3)  & (4)  &  (5)    & (6)    & (7)    & (8)    & $\times$10$^{11}$ & kpc & (11)   &   (12)  &  (13) &   (14)   \\
\hline
BD+30       &  10.28  &  0.50  &  9  &  31~500  &         & 30~000  & 30~000    & 29.5  & 1.0 & 1.66  & 1870 & 2450 &   \\      
Hb~5       &  17.1   &  1.60  &  8  & 105~000  & 130~000  & 145~000 & 140~000  & 11.9  & 2.3 & 0.128  & 5600 & 2700 & 4550  \\
He~2-111   &         &        &     &         &           &          & 200~000: & 1.34 & 2.5 &     &      &      & 650   \\
Hu~1-2     &  17.76  &  0.60  &  6  & 100~000 & 145~000  & 130~000  & 140~000 &  2.22  & 1.5 & 0.0335  & 390  & 210 & 540  \\   
IC~418     &  10.23  &  0.33  &  1  &  34~000  &       &  36~000   &   35~000  & 58.3  & 1.0 &1.3  & 1850  & 3700 &     \\
IC~2165    &  17.47  &  0.59  &  2  & 132~00   & 135~000 & 120~000 &  134~000  & 4.98  & 1.5 & 0.0774  & 1750 & 1810 & 2680 \\
IC~4191    &  16.4   &  0.48  & 11  &  79~000  &  90~000  & 97~000  &  90~000  & 5.25  & 2.1 & 0.099  & 580 & 750 & 1300   \\ 
M~1-42     &  17.4   &  0.63  &  h  & 63~000   &  81~000  & 100~000 &  85~000  &  1.0  & 5.0 & 0.179  & 1500 & 810 & 1690  \\ 
Me~2-1     &  18.40   & 0.28  &  2  & 130~000  & 145~000 & 142~000  & 145~000  & 0.935 & 2.3 & 0.0273 & 300  & 210 & 480  \\
Mz~3       &         &  1.65.  &    &         &         &         &  39~500    & 29.6  & 1.3 &        &      & 2300 &     \\ 
NGC~40     &  11.55  &  0.605  & 1  &  35~000  &        & 40~000 &  38~000    & 17.3   & 0.8 & 0.683  & 875  & 570  &    \\
NGC~2022   &  15.75 &  0.38   & 1~11  &  59~000 &  108~000 & 105~000 & 108~000  & 1.79   & 1.8 & 0.099 & 1200  & 220  & 1500   \\
NGC~2440   &  17.63 &  0.50  & 2    &  208~000  &  205~000  & 180~00 & 200~000  & 9.1   & 2.0  & 0.037 & 2000 & 1900 & 2100   \\     
NGC~5315   &  14.3  &  0.54  & 3    &  65~000  &  76~000  &  66~000  & 70~000  & 13.3 & 2.0  & 0.306  & 2020 & 1720 &    \\
NGC~5882   &  13.42 &  0.33  & 1    &  50~000  &  64~000  &  70~000  & 67~000  & 12.7 & 1.2  & 0.231 & 979  & 590 & 1070 \\
NGC~6153   &  15.55 &  1.14  & 1    &  77~000  &  87~000  &  80~000  &  82~000  & 21.5 & 1.2  & 0.169 & 1200 & 1000 & 2000 \\
NGC~6302   &        &        &      &        &           & 300~000:  & 300.000:  & 56.  &  1.6  &       &       & 8000 & 7400  \\
NGC~6445   &  18.72 &  1.06:  & 3   &  185~000  & 175~000  &  175~000 & 180~000  & 8.7  & 1.8 & 0.0348 & 1200 & 1380  & 1170   \\
NGC~6537   &  21.6  &  1.79  & 5   &  410~000  &  350~000  &        & 350~000:  & 12.8 & 2.0  & 0.0147 & 2950  & 4200 & 3700   \\ 
NGC~6543   &  11.29 &  0.10  &  1  &  47~000  &         & 58~000    & 56~000    & 30.8  & 1.0  & 0.457 & 1840  & 1050 &    \\
NGC~6741   &  20.09 &  1.1  &   4  & 205~000  & 219~000  & 230~000  & 220~000  &  4.1  & 1.9 & 0.184   & 710 & 850 & 400   \\      
NGC~6818   &  17.02 &  0.35  &  3 &  140~000  & 155~000 & 138~000 &  145~000  & 7.43  & 2.0 & 0.048 & 940 & 1270 & 2150   \\
NGC~6886   &  18.76 &  0.70  &  6  &  145~000  & 145~000  & 156~000  & 152~000 & 2.34  & 2.6  & 0.038  & 680 & 670  & 690   \\
NGC~7027   &  16.07 &  1.3  & 2~10  & 165~000  & 160~000  & 234~000 & 180~000  & 134.  & 0.9  & 0.0716  & 4820  & 5300 & 4100   \\
NGC~7662   &  14.00 &  0.18  & 1   &  80~000  & 108~000   & 95~000  & 103~000  & 15.3  & 1.2  & 0.118 & 1400  & 770  & 2500  \\
IC~2448    &  14.26 &  0.27  &  1   &  48~000  & 83~000    & 91~400  &  85~000  & 2.35  & 1.4  & 0.147 & 1160  &  151 & 850  \\ 
NGC~2392   &  10.63 &  0.22  & 1   &  37~000  & 78~000   & 80~000  & 80~000   & 6.83  & 1.5    & 0.845 & 26000 & 490 & 4450  \\
NGC~6826   &  10.68  & 0.07  & 1   &  34~000  &        & 45~000    & 42~000   & 12.8  & 1.4    & 0.98  & 2680  & 1120 &    \\
NGC~3242   &  12.32  & 0.12  & 12   &  57~000  & 90~000  & 70~000  & 80~000  & 21.4  &  0.55   & 0.14  &  740  & 260 & 1600   \\
NGC~6369   &  15.91  & 2.12   & 3~12 & 69~000  & 71~000  & 70~000  & 70~000  & 61.6  &  1.2   & 0.40  & 3250  & 2850  & 2900  \\
NGC~6210   &  12.66  & 0.14  & 7   &  51~000  & 61~000   & 69~000  & 65~000  & 11.0  & 1.57   & 0.36  & 2070  & 890  & 1060   \\
NGC~2792   &  16.89  & 0.80  & 1~11  & 82~000  & 135~000  & 126~000  & 130~000  & 3.05  & 1.9 & 0.079 & 1600 & 430  & 1570   \\
NGC~1535   &  12.11  & 0.08  &  1   &  40~000  &  76~000  & 87~000  & 80~000    & 4.8  &  2.1   & 0.519   & 9900   & 680   & 2500    \\
\hline
\end{tabular}
\tablefoot{H$\beta$ in units erg cm$^{-2}$ s$^{-1}$, Col.~7 is the energy balance 
temperature, Col.~8 is the effective temperature, Col.~12 1s the luminosity found
from the magnitude and effective temperature of the central star, Col.~13 is the
luminosity found from the nebular hydrogen line, Col.~14 is the luminosity found
fron the nebulae ionized helium line.
\tablebib{1)~Ciardullo et~al. (\cite{ciar}); 2)~Wolff et~al. (\cite{wolff}); 
3)~Gathier \& Pottasch (\cite{gathier}); 4)~Sabbadin et~al. (\cite{sabbadin}); 
5)~Matsuura et~al.  (\cite{mats}); 6)~Heap et~al. (\cite{heapc}); 7)~Pottasch et~al.
(\cite{pbsr}); 8)~Tylenda et~al. (\cite{tylenda}); 9)~Crowther et~al. (\cite{crowther});
10)~Zijlstra et~al. (\cite{zijlstra}); 11)~Preite-Martinez et~al. (\cite{pmak}); 
12)~Pottasch \& Bernard-Salas (\cite{pobs}).}}
\vspace*{-4mm}
\end{table}