\begin{table}%t6
      \caption{\label{table.variable}Long-term X-ray variable stars.}   
        %%\centerline
\par
{\small 
         \begin{tabular}{ll c l}
            \hline
            \hline
            \noalign{\smallskip}
No.	& Name				& Variability 	& Instrument 	\\
	&				& factor\tablefootmark{b}	& 		\\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
3	& \object{Mayrit 42062} AB	& 4.5		& EPIC	\\
4	& Mayrit 348349			& 0.22		& EPIC	\\
16	& \object{Mayrit 97212}		& 7.2		& EPIC	\\
20	& \object{Mayrit 344337} AB	& 7.3		& EPIC	\\
37	& \object{Mayrit 102101} AB	& 8.3		& HRI	\\ % 1995~Mar~04
80	& \object{Mayrit 497054}	& 4.6		& EPIC	\\
84\tablefootmark{a}& \object{Mayrit 433123}	& 0.21		& EPIC	\\
97	& No.~97			& 5.9		& ACIS-S\\ 
99	& \object{Mayrit 957055}	& 5.2		& IPC	\\ % 1980 Mar 02
...	& \object{Mayrit 631045}$^{f}$	& $\gtrsim$4.8	& EPIC	\\
...	& \object{Mayrit 662301}$^{f}$	& $\gtrsim$6.3	& EPIC	\\
...	& \object{Mayrit 841079}$^{f}$	& $\gtrsim$4.4	& EPIC	\\
            \hline
         \end{tabular}}
\tablefoot{\tablefoottext{a}{See Sect.~\ref{section.browndwarfs} for a discussion on
the brown dwarf No.~84/Mayrit~433123.}
\tablefoottext{b}{Quotient of the measured count-rate ratio $CR_{1}$/$CR_{2}$ and 
the average count-rate ratio $(CR_{1}$/$CR_{2})_{0}$, where 1 denotes the 
space-mission instrument listed in the last column and 2 denotes 
HRC-I/{\em Chandra}.
The values of $(CR_{1}$/$CR_{2})_{0}$ are 0.40 (IPC/{\em Einstein}), 0.45 
(HRI/{\em ROSAT}), 0.25 (ACIS-S/{\em Chandra}), and 1.50 
(EPIC/{\em XMM-Newton}).}}
   \end{table}