\begin{table}%t5
   %\centering
\par
      \caption{Comparison of distances within the AGN environment: object name, log ionisation parameter of each phase (log $\xi$; erg~cm~s$^{\rm -1}$), black hole mass ($M_{\rm BH}$; 10$^{\rm 7}$~$M_\odot$), distance of BLR from central engine ($r_{\rm BLR}$; pc), distance of torus from central engine ($r_{\rm torus}$; pc), minimum distance of warm absorber from central engine ($r_{\rm min}$; pc), maximum distance of warm absorber from central engine ($r_{\rm max}$; pc), the ratios of the minimum and maximum distances to the BLR and torus distances respectively ($r_{\rm min}$/$r_{\rm BLR}$, $r_{\rm max}$/$r_{\rm BLR}$, $r_{\rm min}$/$r_{\rm torus}$, $r_{\rm max}$/$r_{\rm torus}$).\label{distance_comp}  }
           \begin{tabular}{llllllllllr}
            \hline\hline
            \noalign{\smallskip}
Object & log $\xi$ & $M_{\rm BH}$ & $r_{\rm BLR}$ & $r_{\rm torus}$ & $r_{\rm min}$ & $r_{\rm max}$ & $r_{\rm min}$/$r_{\rm BLR}$ & $r_{\rm max}$/$r_{\rm BLR}$ & $r_{\rm min}$/$r_{\rm torus}$ & $r_{\rm max}$/$r_{\rm torus}$ \\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
MR2251-178	& 2.9   & 0.83$^{{ a}}$ & 0.027$^{{b}}$   & 5.4     & 1.1	   & 29     & 43     & 1100	 & 0.21 & 5.3 \\
	        & 0.68	&		      &                        &         & 1.1     & 3000   & 43     & 110000  & 0.21 & 570 \\
PG0844+349	& 3.7   & 2.7$^{{c}}$  & 0.020$^{{c}}$   & 3.0 & 5.9 $\times$ 10$^{\rm -5}$ & 4.6 $\times$ 10$^{\rm -5}$ & 0.0029 & 0.0023 & 2.0 $\times$ 10$^{\rm -5}$ & 1.5 $\times$ 10$^{\rm -5}$ \\
PG1211+143	& 3.4   & 2.36$^{{c}}$ & 0.085$^{{c}}$   & 2.7 & 0.00035 & 2.7$\times$ 10$^{\rm -4}$ & 0.0042 & 0.0032 & 0.00013  & 9.8 $\times$ 10$^{\rm -5}$ \\
	        & 1.7	&		      &                        &        & 0.00035 & 0.0054 & 0.0042 & 0.064 & 0.00013 & 0.0020 \\
                & --0.9  & 2.36                & 0.085                  & 2.7     & $-$     & $-$    & $-$   & $-$     & $-$   & $-$ \\
IRAS 13349+2438	& 2.25  & 80$^{{d}}$   & 0.11$^{{e}}$    & 3.3     & $-$	   & $-$    & $-$   & $-$     & $-$   & $-$ \\
	        & 0	&		      &                        &         & 39      & 620    & 350   & 5500    & 12    & 180 \\
NGC~4593	& 2.61  & 0.2$^{{f}}$  & 0.0076$^{{f}}$  & 0.71    & 0.11    & 0.31   & 14    & 41      & 0.15  & 0.44 \\
	        & 0.5	&		      &                        &         & 0.12    & 40	    & 16    & 5300    & 0.17  & 56 \\
NGC~3783	& 1.1   & 1.1$^{{g}}$  & 0.0038$^{{g}}$  & 1.2	 & 0.17    & 2.9    & 45    & 770     & 0.14  & 2.4 \\
	        & 2.3	&		      &                        &         & 0.17    & 0.29   & 45    & 77      & 0.14  & 0.24 \\
	        & 2.9	&		      &                        &         & 0.17	   & 0.11   & 45    & 29      & 0.14  & 0.092 \\
Markarian 509   & 1.76  & 9.5$^{{g}}$  & 0.067$^{{g}}$   & 3.6	 & 20	   & 180    & 310   & 2700    & 5.6   & 49 \\
NGC~7469	& 2.1   & 0.76$^{{g}}$ & 0.0042$^{{g}}$  & 1.67	 & 0.10    & 1.6    & 24    & 370     & 0.061 & 0.93 \\
NGC~3516	& 0.78  & 2.3$^{{h}}$  & 0.0088$^{{i}}$  & 0.64	 & 4.9     & 20	    & 560   & 2300    & 7.7   & 31 \\
NGC~5548	& 2.69  & 6.8$^{{g}}$  & 0.015$^{{g}}$   & 1.7	 & 6.0     & 2.3    & 400   & 150     & 3.5   & 1.3 \\
        	& 1.98	&		      &                        &         & 3.0	   & 4.8    & 200   & 310     & 1.8   & 2.8 \\
        	& 0.4	&		      &                        &         & 7.0	   & 420    & 460   & 27000   & 4.0   & 240 \\
MCG-6-30-15	& 1.25  & 1.5$^{{j}}$  & 0.0068$^{{e}}$  & 0.72    & 5.7     & 33	    & 840   & 4800    & 7.9   & 46 \\
	        & 2.5	&		      &                        &         & 0.036   & 0.016  & 5.2   & 2.4     & 0.050 & 0.023 \\
Markarian 766   & 0.7   & 1.9$^{{k}}$  & 1.1$^{{e}}$     & $-$	 & $-$     & $-$    & $-$   & $-$     & $-$   & $-$ \\
NGC~4051	& 1.4   & 0.14$^{{g}}$ & 0.0054$^{{g}}$  & 0.15	 & 0.075   & 0.12   & 14    & 23      & 0.50  & 0.84 \\
Ark 564	        & 0 & 3.7$^{{l}}$ & $\leq$0.0025$^{{m}}$ & 3.9	 & 14	   & 9400   & 5600  & 3700000 & 3.6   & 2400 \\
	        & 2	&		      &                        &         & 14      & 290    & 5600  & 120000  & 3.6   & 75 \\
           \hline
         \end{tabular}        
\begin{list}{}{}
\item[$^{{a}}$] \citet{morales2002}; $^{{b}}$ \citet{monier2001}; $^{{c}}$ \citet{kaspi2000rblr}; $^{{d}}$ \citet{brandt1997}; $^{{e}}$ calculated from $L_{\rm Bol}$ as described in text; $^{{f}}$ \citet{santos1995}; $^{{g}}$ \citet{wandel1999}; $^{{h}}$ \citet{gebhardt2000}; $^{{i}}$ \citet{wanders1993}; $^{{j}}$ \citet{reynolds2000}; $^{{k}}$ \citet{mathur2001}; $^{{l}}$ \citet{matsumoto2004}; $^{{m}}$ \citet{shemmer2001}.
\end{list}
  \end{table}