\begin{table}%t2
\caption{INTEGRAL and some previous gamma-ray experiments.}
         \label{comparison}
%\centerline
{   \begin{tabular}{llllllll}
            \hline\hline
%        \noalign{\smallskip}
 Parameter & OSSE & COMPTEL & EGRET& BATSE & SIGMA$^c$ & HEAO--3 & INTEGRAL \\  
% \noalign{\smallskip}
            \hline
Energy range & 0.05--10 & 0.7--30 & 20--30~000 & 0.03--1.9 & 0.035--1.3 & 0.05--10 & 0.004--10 \\
(MeV) & & & & & & & (JEM-X, SPI,\\
      & & & & & & &  IBIS)\\
Energy resolution & 5--12& 4--15 & ~$\sim$20 & 20--32 & 8--16 & 0.2  & 0.16  \\
(\%) & & & & & & @ 1.8 MeV & @ 1.8 MeV \\
     & & & & & & & (SPI)\\
Source position & 10$^{\prime}$ & 0.5$^{\circ}$ -- 1$^{\circ}$ & $\leq$10$^{\prime}$ & 1$^{\circ}$ & $\sim$1$^{\prime}$ & none & $\leq$1$^{\prime}$--1.5$^{\prime}$\\ 
localization & & & & & & &  (IBIS)\\
Field of View & $3.8^{\circ}\times11.4^{\circ}$ & 1 sr & 0.6 sr& Earth occultation 
& $4.7^{\circ}\times4.3^{\circ}$ & $30^{\circ}\times30^{\circ}$ & 16$^{\circ}$ \\
& & & & & fully coded & & fully coded  \\
& & & & & & & (SPI) \\
Narrow line sens. 
& $7\times10^{-5}$ 
& $5\times10^{-5}$ 
& n/a 
& --
& $\sim$$8\times10^{-4}$$^b$
& $\sim$$2\times10^{-4}$$^e$
& $2.4\times10^{-5}$\\
(ph cm$^{-2}$ s$^{-1}$) & @ 1 MeV & @ 1 MeV & & & @ 511 keV & & @ 1 MeV\\
(3$\sigma$, 10$^6$ s) & & & & & & & (SPI) \\
Continuum sens. 
& $2\times10^{-7}$
& $1.7\times10^{-7}$
& $5\times10^{-8}$
& $\sim$$2\times10^{-3}$$^a$
& $7\times10^{-6}$
& $\sim$$1\times10^{-5}$
& $5\times10^{-7}$ \\
(ph cm$^{-2}$ s$^{-1}$ keV$^{-1}$) 
& @ 1 MeV & @ 1 MeV & $\geq$100 MeV & 25--35 keV & @ 100 keV & entire survey  & @ 1 MeV  \\ 
(3$\sigma$, 10$^6$ s) &  $5\times10^{-7}$ & & & & & @ 100 keV$^d$& (IBIS)\\
& @ 100 keV & & & & & & \\
Years of & 1991--2000 & 1991--2000 & 1991--2000 & 1991--2000 & 1989--1998 & 1979--1981 & 2002 $\rightarrow$ \\
operation & & & & & & & \\
% \noalign{\smallskip}
            \hline
%            \noalign{\smallskip}
\end{tabular}}
\medskip
 \begin{list}{}{}
\item $^a$ Calculated from Shaw S. E., et~al. 2001, in Exploring the Gamma-ray Universe, Proc. of the 4th INTEGRAL      Workshop, ed. A. Gim\'enez et~al., ESA SP-459, 521. 
\item $^b$ Goldwurm A., et~al. 1992, ApJ, 369, 79.
\item $^c$ Paul J., et~al. 1991, Adv. Space Res., 11 (8), 289.
\item $^d$ Ulmer M. P., et~al. 1991, ApJ, 369, 485.
\item $^e$ Line sensitivity from
{\tt http://heasarc.gsfc.nasa.gov/docs/heao3/heao3$_{-}$about.html}.
\end{list}{}{}
\end{table}