\begin{table}%t1
\caption{List of observations retrieved from the archives with some basic information (configuration of the instruments, instrument that detected the prompt emission). We also report the first refereed publication on the X-ray afterglow.}
\label{table1}
%\centerline
{
\begin{tabular}{cccccccc}
\hline\hline
GRB~                & Instrument           & archive    & Prompt   & Fluence (band)           & Afterglow   & Redshift & Ref.\\
                    &                      & Obs-ID     & detection& erg.cm$^{-2}$ (keV)      & Detection   &          &    \\
\hline
\object{GRB~991216} & Chandra ACIS-S, HETG & 596        & BATSE    & $2\times10^{-4}$~(20--300) & X, opt, rad &  1.02    & 1  \\
\object{GRB~000210} & Chandra ACIS-S       & 602        & BeppoSAX &$6.1\times10^{-6}$~(40--700)& X, rad      &  0.846   & --\\
\object{GRB~000926} & Chandra ACIS-S       & 598, 1047  & Ulysses  &$2.2\times10^{-5}$~(25--100)& X, opt, rad &  2.066   & 2  \\
\object{GRB~010222} & Chandra ACIS-S       & 2424, 1048 & BeppoSAX &$9.25\times10^{-5}$~(40--700)&X, opt, rad &  1.477   & --\\
\object{GRB~011030} & Chandra ACIS-S       & 3411, 3412 & BeppoSAX &$1.13\times10^{-6}$~(40--700)&rad         &  ${<}$3    & --\\
\object{GRB~011130} & Chandra ACIS-I       & 2823       & HETE-2   & --                      & --         &  --     & --\\
\object{GRB~020127} & Chandra ACIS-I       & 3436, 3437 & HETE-2   & --                      & X, rad      &  --     & --\\
\object{GRB~020321} & Chandra ACIS-S       & 3477       & BeppoSAX &$3.0\times10^{-6}$~(40--700)& --         &  --     & --\\
\object{GRB~020405} & Chandra ACIS-S, LETG & 2825       & Ulysses  & $3\times10^{-5}$~(25--100) & X, opt, rad & 0.69     & 15 \\
\object{GRB~020427} & Chandra ACIS-S       & 3493, 3494 & BeppoSAX &${<}2.9\times10^{-7}$~(40--700)&X           & --      & 3  \\
\object{GRB~020531} & Chandra ACIS-I       & 2824, 3673 & HETE-2   & $1\times10^{-7}$~(8-40)   & --         & --      & --\\
\object{GRB~020813} & Chandra ACIS-S, HETG & 4364       & HETE-2   &$3.8\times10^{-5}$~(25--100)& X, opt, rad & 1.25     & 4  \\
\object{GRB~021004} & Chandra ACIS-S, HETG & 4381, 4409 & HETE-2   &$3.2\times10^{-6}$~(7--400) & X, opt, rad & 2.3      & 4  \\
\object{GRB~021201} & Chandra ACIS-I       & 3784, 3785 & IPN      &$2\times10^{-7}$~(25--100)  & --         & --      & --\\
\object{GRB~030226} & Chandra ACIS-S       & 4425       & HETE-2   &$5.7\times10^{-6}$~(30--400)& X, opt      &  1.98    & 5  \\
\object{GRB~030328} & Chandra ACIS-S, LETG & 4432       & HETE-2   &$3.0\times10^{-5}$~(30--400)& X, opt      & 1.52     & --\\
\object{GRB~030528} & Chandra ACIS-S       & 3920, 3921 & HETE-2   &$4.8\times10^{-6}$~(30--400)& X, opt      & --      & 6  \\
\object{GRB~030723} & Chandra ACIS-S -I    & 3918, 3922 & HETE-2   &$0.2\times10^{-7}$~(30--400)& X, opt      & --      & 18 \\
\object{GRB~031220} & Chandra ACIS-I       & 3905, 3906 & HETE-2   &$1.9\times10^{-6}$~(25--100)& X, opt      & --      & 7  \\
\object{GRB~040701} & Chandra ACIS-I       & 4661, 4662 & HETE-2   &$4.5\times10^{-7}$~(2--25)  & X           & 0.2146   & --\\
\object{GRB~040812} & Chandra ACIS-S       & 5364, 5365 & INTEGRAL &$2.5\times10^{-7}$~(20--200)& X           & --      & --\\
\hline
\object{GRB~001025A}& \mbox{XMM-Newton}           &0128530301  & Ulysses  &$3.2\times10^{-6}$~(25--100)& --         &   --    & 8  \\
\object{GRB~010220} & \mbox{XMM-Newton}           &0111520301  & BeppoSAX &      --                 & --         &   --    & 8  \\
                    &                      &0111520401  &          &                          &             &          &    \\
\object{GRB~011211} & \mbox{XMM-Newton}           &0094380101  & BeppoSAX &$3.7\times10^{-6}$~(40--700)& X, opt      &  2.14    & 9  \\
\object{GRB~020321} & \mbox{XMM-Newton}           &0008820401  & BeppoSAX &$3.0\times10^{-6}$~(40--700)& --         &  --     & --\\
\object{GRB~020322} & \mbox{XMM-Newton}           &0110980301  & BeppoSAX &      --                 & X, opt      &  --     & 10 \\
                    &                      &0128530801  &          &                          &             &          &    \\
\object{GRB~030227} & \mbox{XMM-Newton}           &0128531201  & INTEGRAL &$8.8\times10^{-7}$~(20--200)& X, opt      &  --     & 11 \\
\object{GRB~030329} & \mbox{XMM-Newton}           &0128531401  & HETE-2   &$1\times10^{-4}$~(30--400)  & X, opt, rad &  0.168   & 12 \\
                    &                      &0128531501  &          &                          &             &          &    \\
                    &                      &0128531601  &          &                          &             &          &    \\
\object{GRB~031203} & \mbox{XMM-Newton}           &0158160201  & INTEGRAL &$1.5\times10^{-6}$~(20--200)& X, opt, rad &  0.105   & 13 \\
                    &                      &0163360201  &          &                          &             &          &    \\
\object{GRB~040106} & \mbox{XMM-Newton}           &0158160401  & INTEGRAL &$8.3\times10^{-7}$~(20--200)& X, opt      &  --     & 14 \\
\object{GRB~040223} & \mbox{XMM-Newton}           &0158160601  & INTEGRAL &$4.4\times10^{-7}$~(20--200)& X           &  --     & 17 \\
\object{GRB~040827} & \mbox{XMM-Newton}           &0164570401  & INTEGRAL & --                      & X, opt      &  --     & 16\\
\hline
\end{tabular}
}\medskip
\par
N.B. References are: 1: \citet{piro00}, 2:  \citet{piro01}, 3: \citet{ama04}, 4: \citet{but03}, 5: \citet{klo04}, 6: \citet{rau04}, 7: \citet{mel05}, 8: \citet{wat02a}, 9: \citet{ree02}, 10: \citet{wat02b}, 11: \citet{mer03}, 12:~\citet{tie03}, 13: \citet{wat04}, 14: \citet{gen04}, 15: \citet{mir03}, 16: \citet{del05}, 17: \citet{gly05}, 18: \citet{but05a}.
\end{table}