\begin{table}%t2
\caption{GRBs data sample.\label{table:no6}}  
%\centerline
{\begin{tabular}{c c c c c c c}
\hline\hline \noalign{\smallskip}
GRB & $z$ & $E_{\rm p}$ (keV) & $S_{\rm bolo}$ (erg cm$^{-2}$) & $t_{\rm jet}$ (days) & $\theta_{\rm jet}$ (deg.) & $n_0$ (cm$^{-3}$) \\
(1) & (2) & (3) & (4) & (5) & (6) & (7)\\
\hline 
970508  & 0.84 & 389 $\pm$ 40 & 8.09E--6 $\pm$ 8.1E--7    &   25  $\pm$   5 & 23  $\pm$   3 &  3.0 $\pm$ 2.4 \\ 
970828  & 0.96 & 298 $\pm$ 30 & 1.23E--4 $\pm$   1.2E--5  &   2.2 $\pm$   0.4 &   5.91    $\pm$   0.79 & 3.0 $\pm$ 2.4  \\
980703  & 0.97 & 254 $\pm$ 25 & 2.83E--5 $\pm$   2.9E--6  &   3.4 $\pm$   0.5 &   11.02   $\pm$   0.8 & 28.0 $\pm$ 10   \\
990123  & 1.61 & 604 $\pm$ 60 & 3.11E--4 $\pm$   3.1E--5  &   2.04    $\pm$   0.46    &   3.98    $\pm$   0.57 &  3.0 $\pm$ 2.4 \\
990510  & 1.62 & 126 $\pm$ 10 & 2.85E--5 $\pm$   2.9E--6  &   1.6 $\pm$   0.2 &   3.74    $\pm$   0.28 &  0.29 $\pm$ 0.14 \\
990705  & 0.84 & 189 $\pm$ 15 & 1.34E--4 $\pm$   1.5E--5  &   1   $\pm$   0.2 &   4.78    $\pm$   0.66 &  3.0 $\pm$ 2.4 \\
990712  & 0.43 & 65 $\pm$ 10 & 1.19E--5  $\pm$   6.2E--7  &   1.6 $\pm$   0.2 &   9.47    $\pm$   1.2 & 3.0 $\pm$ 2.4  \\
991216  & 1.02 & 318 $\pm$ 30 & 2.48E--4 $\pm$   2.5E--5  &   1.2 $\pm$   0.4 &   4.44    $\pm$   0.7 & 4.7 $\pm$ 2.8  \\
010222  & 1.48 & 309 $\pm$ 12 & 2.45E--4 $\pm$   9.1E--6  &   0.93    $\pm$   0.1 &   3.03    $\pm$   0.14 &  3.0 $\pm$ 2.4 \\
011211  & 2.14 & 59 $\pm$ 8 & 9.20E--6   $\pm$   9.5E--7  &   1.56    $\pm$   0.16    &   5.38    $\pm$   0.66 &  3.0 $\pm$ 2.4 \\
020124  & 3.20 & 87 $\pm$ 18 & 1.14E--5  $\pm$   1.1E--6  &   3   $\pm$   0.4 &   5.07    $\pm$   0.64 &  3.0 $\pm$ 2.4 \\
020405  & 0.70 & 364 $\pm$ 90 & 1.10E--4 $\pm$   2.1E--6  &   1.67    $\pm$   0.52    &   6.27    $\pm$   1.03 &  3.0 $\pm$ 2.4 \\
020813  & 1.25 & 142 $\pm$ 14 & 1.59E--4 $\pm$   2.9E--6  &   0.43    $\pm$   0.06    &   2.8 $\pm$   0.36 &  3.0 $\pm$ 2.4 \\
021004  & 2.32 & 80 $\pm$ 53 & 3.61E--6  $\pm$   8.6E--7  &   4.74    $\pm$   0.5 &   8.47    $\pm$   1.06 & 30.0 $\pm$ 27.0  \\
030226  & 1.98 & 97 $\pm$ 27 & 8.33E--6  $\pm$   9.8E--7  &   1.04    $\pm$   0.12    &   4.71    $\pm$   0.58 &  3.0 $\pm$ 2.4 \\
030328  & 1.52 & 126 $\pm$ 14 & 6.14E--5 $\pm$   2.4E--6  &   0.8 $\pm$   0.1 &   3.58    $\pm$   0.45 &  3.0 $\pm$ 2.4 \\
030329  & 0.17 & 67.9 $\pm$ 2.3 & 2.31E--4   $\pm$   2.0E--6  &   0.5 $\pm$   0.1 &   5.69    $\pm$   0.5 &  1.0 $\pm$ 0.11 \\
030429  & 2.66 & 35 $\pm$ 12 & 1.13E--6  $\pm$   1.9E--7  &   1.77    $\pm$   1.0 &   6.3 $\pm$   1.52 &  3.0 $\pm$ 2.4 \\
041006  & 0.71 & 63 $\pm$ 12 & 1.75E--5  $\pm$   1.8E--6  &   0.16    $\pm$   0.04    &   2.79    $\pm$   0.41 & 3.0 $\pm$ 2.4  \\
050318  & 1.44 & 47 $\pm$ 15 & 3.46E--6  $\pm$   3.5E--7  &   0.21    $\pm$   0.07    &   3.65    $\pm$   0.5 & 3.0 $\pm$ 2.4  \\
050505  & 4.27 & 70 $\pm$ 23 & 6.20E--6  $\pm$   8.5E--7  &   0.21    $\pm$   0.04    &   3.0 $\pm$   0.8 & 3.0 $\pm$ 2.4  \\
050525  & 0.61 & 81.2 $\pm$ 1.4 & 2.59E--5   $\pm$   1.3E--6  &   0.28    $\pm$   0.12    &   4.04    $\pm$   0.8 & 3.0 $\pm$ 2.4  \\
050904  & 6.29 & 436 $\pm$ 200 & 2.0E--5 $\pm$   2E--6    &   2.6 $\pm$   1   &   8   $\pm$   1 &  3.0 $\pm$ 2.4 \\
051022  & 0.80 & 510 $\pm$ 22 & 3.40E--4 $\pm$   1.2E--5  &   2.9 $\pm$   0.2 &   4.4 $\pm$   0.1 & 3.0 $\pm$ 2.4  \\
060124  & 2.30 & 237 $\pm$ 76 & 3.37E--5 $\pm$   3.4E--6  &   1.2 $\pm$       &   3.72    $\pm$   0.15 & 3.0 $\pm$ 2.4  \\
060210  & 3.91 & 149 $\pm$ 35 & 1.94E--5 $\pm$   1.2E--6  &   0.33    $\pm$   0.08    &   1.9 $\pm$   0.17 &  3.0 $\pm$ 2.4 \\
060526  & 3.21 & 25 $\pm$ 5 & 1.17E--6   $\pm$   1.7E--7  &   1.27    $\pm$   0.35    &   4.7 $\pm$   1 & 3.0 $\pm$ 2.4  \\
\hline
\end{tabular}}
\bigskip
\par
References: (1)~\citet{Jimenez}; (2)~\citet{Metzger}; (3)~\citet{Djorgovski}; (4)~\citet{Kulkarni}; (5)~\citet{Israel}; (6)~\citet{Bjornsson}; (7)~\citet{Li}
\end{table}