\begin{table}%t1
\caption{\label{tab:ASM bg}HBLs and X-ray faint sources considered in this work.}
%\centerline
 {
\begin{tabular}{l|cccc}
\hline\hline
Source name	   & 	X-ray at 1 keV ($\mu$Jy)  	
& Mean (ASM c/s)   &   Sigma (ASM c/s) & $z$\\
\hline
Mkn~421  &    10.1 & & & 0.031\\
Mkn~501  &	   9.5 & & & 0.034\\
1ES~1959+650  &	   9.4 & & & 0.048\\
1ES~2155-304  &  15.2 & & &0.117\\
\hline
PKS~0118-272 	& 0.22 & 0.03 & 0.25 & 0.557\\
1ES~0235+164 	& 0.28 & 0.09 & 0.24 & 0.94\\
S5~0454+844 	& 0.03 & 0.07 & 0.21 & 0.112\\
PKS~0735+178	& 0.20 & 0.11 & 0.31 & 0.424\\
PKS~0829+046	& 0.08  & 0.07  & 0.25 & 0.174\\
S4~0954+65	& 0.56 & 0.09 & 0.21 & 0.368\\
B2~1147+245 	& 0.04 & 0.10 & 0.24 & $\sim$0.2\\
\hline
\end{tabular}}
\par
\medskip
The first 
column contains the X-ray monochromatic emission, the second and the third contain the 
mean and standard deviation of the Gaussian that fit at the best the flux distribution. 
Last column contains the red-shift. The mean value of
the RXTE/ASM count rate is reported for the faint sources only since the HBLs
 are too variable for a definition
of a mean flux value. For comparison, the resulting $R_{\rm char}$ and $\sigma_{\rm char}$ 
are reported in Table~\ref{tab:ASM flares}.
\end{table}