\begin{table}%t2
%\begin{center}
\par
\caption{\label{Tab2}Best-fit parameters as derived by fitting the XRT and IBIS data.}
\begin{tabular}{lcccccccc}
\hline
\hline
Source & Energy band & $N_{\rm H(Gal)}^{a}$ & $N_{\rm H}^{a}$ & $\Gamma$&$C_{\rm calib}^{b}$ & 
$\chi^2/\nu$ &
$F_{\rm (2-10~keV)}^{c}$ & $F_{\rm (20-100~keV)}^{c}$ \\
       &   (keV) &  &    &  &  &  &   &      \\
\hline
IGR~J18249--3243  & 0.5--100 & 0.118  & --  & $1.54\pm0.12$ & $\rm 0.52^{+0.35}_{-0.21}$ & 32.7/31  &
$0.52\pm0.03$  &  $0.79\pm0.15$  \\
IGR~J19443+2117   & 0.9--100 & 0.836  &  $\rm 0.54^{+0.12}_{-0.13}$ & $2.04\pm0.12$ & $\rm 0.60^{+0.37}_{-0.28}$ 
& 84.3/93 & $1.83\pm0.04$  &  $1.12\pm0.22$  \\
IGR~J22292+6647 (low + high) & 1--100 & 0.481 &  --  & $1.60\pm0.10$ & $\rm 0.76^{+0.45}_{-0.32}$$^{d}$&
120.5/105  &  $0.67\pm0.05$$^{e}$  & $1.10\pm0.02$  \\
\hline
\end{tabular}
%\end{center}
\par
$^{a}$ In units of $10^{22}$ cm$^{-2}$ (from Kalberla et al. 2005);
$^{b}$ IBIS/XRT cross-calibration constant;
$^{c}$ in units of $10^{-11}$ erg cm$^{-2}$ s$^{-1}$;
$^{d}$ the simultaneous fit of the low and high XRT states, performed by normalising to the low 
state, provides a cross-calibration constant for the high state of $\rm 1.42^{+0.16}_{-0.14}$, thus 
confirming variability during XRT observations;
$^{e}$ in this case we report the average value found for the flux.
\end{table}