\begin{table}%t5
 \caption{\label{tab:shh}List of flares showing progressive spectral hardening.}
 

 %\centerline
{
 \small\begin{tabular}{clccccc}
 \hline\hline
 Catalogue & Date & GOES & Longitude & Occultation & $\gamma$ range & Time \\
 number & & class &  & height [Mm] & & interval\\
 \hline
9700 & 1994 February 27 & M2.8 & W97.5 & 6.1 & 6$\rightarrow$4 & 09:09--09:18 \\
11950 & 1998 May 9 & M7.7 & W102.3 & 17.1 & 6.0$\rightarrow$3.4 & 03:29--03:39 \\
25540$^{a}$ & 2001 April 1 & M5.5 & E107.0 & 34.1 & $>$11$\rightarrow$7.6$^{b}$ & 11:48-11:54 \\
 \hline
 \end{tabular}}
 \medskip
\par
$^{a}$ Only the decay phase is available.\\
$^{b}$ Strong contamination with emission of thermal  plasma.
\end{table}