\begin{table} %t1
%%\centering
\par
\caption{IBIS scientific facts.}\label{tab1}
\begin{tabular}{@{} l l}
\hline \hline 
Parameter& Value \\
Energy range & 15 keV--10 MeV \\
Sensitive area & 2600 cm$^{2}$ CdTe, 2890 cm$^{2}$ CsI \\
Energy resolution at 100 keV and at 1 MeV & 9{\%} and 10{\%} (singles) \\
Field of view fully coded and partially coded & 9$^{\circ}$ and 19$^{\circ}$ (50{\%})  \\
Continuum sensitivity 3$\sigma $, 10$^{6}$ s, at 100 keV &
$3.8\times 10^{-7 }$ and $5.0\times 10^{-7 }$ \\
and 1~MeV (ph cm$^{-2}$ s$^{-1}$ keV$^{-1})$  &  \\
\hline\\[-3mm]
 Line sensitivity \par 3$\sigma $, 10$^{6}$ s, at 100 keV & $1.3\times 10^{-5}$ and $3.8\times 10^{-4}$   \\
and 1 MeV \par (ph cm$^{-2}$ s$^{-1}$ )& \\
Angular resolution & 12 arcmin \\
Point source location accuracy & 30 arcsec  \\
Timing resolution & 61 $\mu $s (for $E< 1$ MeV and Compton), 1 ms (Spectral timing, no imaging) \\
  & 2000 s ($E\ge 175$ keV with imaging) \\
\hline 
\end{tabular}
\end{table}