\begin{table}%t1
\caption{\label{table:1}Physical parameters of observed flares.} % title of Table
\small
%\centerline
{\begin{tabular}{c c c c c c c c c c} % centered columns (10 columns)
\hline\hline % inserts double horizontal lines
Event     & Time of & GOES    & GOES         &Type             &$\gamma$ & $a_0$                & $E_{\rm c}$ &  $S$              & $L_0$        \\ %
date      & maximum & class   & incremental  &of               &         &                      &       &                  &              \\
          & [UT]    &         & class        &flare            &         & [ph/cm$^2$/s/keV]  & [keV] & [$10^{17}$ cm$^2$] & [$10^{8}$ cm] \\
 \hline
16-Dec.-91 & 04:58   & M2.8    & M2.7         &C                & 3.6    & $7.6\times 10^{6}$ & 25.8   & 3.9             &  15.4       \\
02-Feb.-92 & 11:34   & C5.5    & C2.7         &N                & 3.0    & $2.4\times 10^{5}$ & 18.9   & 2.3             &  09.8       \\
27-Oct.-92 & 01:47   & M1.1    & C9.5         &C                & 4.5    & $2.8\times 10^{7}$ & 25.2   & 2.3             &  11.6       \\
03-Oct.-93 & 09:11   & C1.0    & B8.1         &N                & 2.7    & $6.2\times 10^{4}$ & 23.0   & 1.4             &  02.9       \\
07-Mar.-93 & 21:48   & C1.5    & B9.2         &N                & 3.0    & $4.8\times 10^{4}$ & 24.0   & 2.3             &  12.6       \\
26-Jan.-94 & 05:41   & C1.4    & C1.1         &N                & 2.6    & $4.9\times 10^{4}$ & 17.2   & 1.3             &  19.5       \\
%\hline
30-Jun.-99 & 11:30   & M1.9    & M1.8         &C                & 3.4    & $1.0\times 10^{6}$ & 25.8   & 1.8             &  11.5       \\
22-Dec.-99 & 10:56   & C6.4    & C5.4         &N                & 3.7    & $2.8\times 10^{6}$ & 25.2   & 3.9             &  16.6       \\
27-Jul.-00 & 04:10   & M2.5    & M2.4         &C                & 3.2    & $4.8\times 10^{5}$ & 19.8   & 2.3             &  08.7       \\
06-Apr.-01 & 01:49   & C7.8    & C4.9         &N                & 2.7    & $2.1\times 10^{5}$ & 28.7   & 2.3             &  13.0       \\
08-Sep.-01 & 16:45   & C5.1    & C3.2         &N                & 2.9    & $2.0\times 10^{5}$ & 29.6   & 2.3             &  17.0       \\
18-Sep.-01 & 00:08   & M1.5    & M1.3         &C                & 3.7    & $2.3\times 10^{6}$ & 27.0   & 1.1             &  06.8       \\
\hline 
\end{tabular}}
\medskip
 $\gamma$ -- photon spectral index; $E_{\rm c}$ -- low energy cut-off; $a_0$ -- scaling factor (flux at 1~keV); $S$ and $L_0$ -- cross-section and semi-length of the flaring loop; type of flare: $C$ -- correlated flare; $N$ -- non-correlated flare.  
\end{table}