\begin{table}%t1
\caption{\label{tab:host}Main characteristics of the observed AGN. Columns: (1) name of the source from the Third EGRET Catalog; (2) name of the
known counterpart; (3) other name; (4) classification of the active nucleus (LBL: low frequency peaked BL~Lacertae Object;
HBL: high frequency peaked BL~Lacertae Object; FSRQ: flat-spectrum radio quasar; RG: radio galaxy); (5) coordinates (J2000); 
(6) redshift; (7) Galactic absorption column density [$10^{20}$~cm$^{-2}$] from Dickey \& Lockman (\cite{Dickey1990}).}
\small%\centerline
{
\begin{tabular}{llllccc}
\hline\hline
3EG          & Counterpart     & Other name  & AGN type & $\alpha$, $\delta$        & $z$    & $N_{{\rm H}}$ \\
(1)          & (2)             & (3)         & (4)      & (5)                      & (6)    & (7)              \\
\hline
J$0222+4253$ & $0219+428$      & 3C~$66$A    & LBL~     & $02{:}22{:}39.6$, $+43{:}02{:}08$ & $0.444$  &  $8.99$         \\
J$0237+1635$ & AO~$0235+164$   &             & LBL~     & $02{:}38{:}38.9$, $+16{:}36{:}59$ & $0.94$   &  $8.95$         \\
J$0530-3626$ & PKS~$0521-365$  &             & FSRQ     & $05{:}22{:}58.0$, $-36{:}27{:}31$ & $0.05534$&  $3.33$         \\
J$0721+7120$ & S5~$0716+714$   &             & LBL~     & $07{:}21{:}53.4$, $+71{:}20{:}36$ & $>$$0.5^{{\rm *}}$   &  $3.81$         \\
J$0845+7049$ & S5~$0836+710$   & 4C~$71.07$  & FSRQ     & $08{:}41{:}24.3$, $+70{:}53{:}42$ & $2.172$  &  $2.91$         \\
J$1104+3809$ & Mkn~$421$       &             & HBL~     & $11{:}04{:}27.3$, $+38{:}12{:}32$ & $0.03002$&  $1.38$         \\
J$1134-1530$ & PKS~$1127-145$  &             & FSRQ     & $11{:}30{:}07.0$, $-14{:}49{:}27$ & $1.184$  &  $4.02$         \\
J$1222+2841$ & ON~$231$        & W~Comae     & LBL~     & $12{:}21{:}31.7$, $+28{:}13{:}59$ & $0.102$  &  $1.88$         \\
J$1229+0210$ & 3C~$273$        &             & FSRQ     & $12{:}29{:}06.7$, $+02{:}03{:}09$ & $0.15834$&  $1.79$         \\
J$1324-4314$ & Cen A           & NGC~$5128$  & RG       & $13{:}25{:}27.6$, $-43{:}01{:}09$ & $0.00182^{{\rm **}}$ &  $8.62$	        \\
J$1339-1419$ & PKS~$1334-127$  &             & FSRQ     & $13{:}37{:}39.8$, $-12{:}57{:}25$ & $0.539$  &  $4.82$         \\
J$1409-0745$ & PKS~$1406-076$  &             & FSRQ     & $14{:}08{:}56.5$, $-07{:}52{:}27$ & $1.494$  &  $2.77$         \\
J$1621+8203$ & NGC~$6251$      &             & RG       & $16{:}32{:}32.0$, $+82{:}32{:}16$ & $0.0247$ &  $5.47$         \\
J$1832-2110$ & PKS~$1830-211$  &             & FSRQ     & $18{:}33{:}39.9$, $-21{:}03{:}40$ & $2.507$  &  $21.9$         \\
J$2158-3023$ & PKS~$2155-304$  &             & HBL~     & $21{:}58{:}52.0$, $-30{:}13{:}32$ & $0.116$  &  $1.69$         \\
\hline
\end{tabular}}
\smallskip
 $^{{*}}$ Lower limit evaluated on the basis of the non-detection of the host galaxy (Sbarufatti et~al. \cite{Sbarufatti2005}).\\
 $^{{**}}$ This redshift is not indicative and the distance of $3.84$~Mpc is adopted here. See Evans et~al.
(\cite{Evans2004}) for more details.
\end{table}