\begin{table}%t5
\caption{Log of archival and present observations of WR~25.\label{arch_log}}
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    \footnotesize
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\par 
{\begin{tabular}{clrllrr}
\hline\hline
\\[-2mm]
obs.& instrument                     & \multicolumn{2}{c}{observation} & MJD$^a$  & exposure  & total duration \\
no. &              & \multicolumn{1}{c}{ID} & \multicolumn{1}{c}{date} &          & 
 (s)    &  (s)         \\
\hline
 1  & {\it ROSAT}-{\sc pspcb}             & rp200108n00 & 1991, Dec. 15 & 48605.41 & 1610~     & 2839           \\
 2  & {\it ROSAT}-{\sc pspcb}             & rp900176n00 & 1992, Jun. 12 & 48785.94 & 24~321~    & 225~050         \\
 3  & {\it ROSAT}-{\sc pspcb}             & rp201262n00 & 1992, Aug. 09 & 48843.93 & 5665~     & 42~858          \\
 4  & {\it ROSAT}-{\sc pspcb}             & rp900176a01 & 1992, Dec. 15 & 48971.73 & 14~544~    & 2~096~652        \\
 %   &                                     &             &              &          &           &                \\[-2mm]
 %   &                                     &             &              &          &           &                \\[-2mm]
 5  & {\it ASCA}-{\sc sis0+sis1}          & 20018000    & 1993, Aug. 24 & 49223.76 & 30~048~    & 74260          \\
 6  & {\it ASCA}-{\sc sis0+sis1}          & 26033000    & 1997, Jan. 24 & 50806.90 & 37~712~    & 113~184         \\
 %   &                                     &             &              &          &           &                \\[-2mm]
 %   &                                     &             &              &          &           &                \\[-2mm]
 7  & {\it XMM-Newton}-{\sc mos1+pn}$^b$  & 0112580601  & 2000, Jul. 26 & 51751.71 & 31~600$^c$ & 36~604          \\
 8  & {\it XMM-Newton}-{\sc mos1+pn}$^b$  & 0112580701  & 2000, Jul. 27 & 51753.50 & 9700$^c$  & 12~572          \\
 9  & {\it XMM-Newton}-{\sc mos1+mos2+pn} & 0112560101  & 2001, Jun. 25 & 52085.79 & 23~900$^c$ & 36~994          \\
10  & {\it XMM-Newton}-{\sc mos1+mos2+pn} & 0112560201  & 2001, Jun. 28 & 52088.81 & 27~500$^c$ & 38~506          \\
11  & {\it XMM-Newton}-{\sc mos1+mos2+pn} & 0112560301  & 2001, Jun. 30 & 52090.70 & 32~600$^c$ & 37~474          \\
12  & {\it XMM-Newton}-{\sc rgs1+rgs2+mos1} & 0112560201  & 2001, Jun. 28 & 52088.81 & 25~300$^c$ & 38~506        \\
13  & {\it XMM-Newton}-{\sc rgs1+rgs2+mos1} & 0112560301  & 2001, Jun. 30 & 52090.70 & 33~300$^c$ & 37~474  \\      
\hline
\end{tabular}}
$^a$ Exposure start. \\
$^b$ {\sc mos2} was in "small window mode'', with WR~25 close to the edge of
the central {\sc ccd}, which renders the data unusable. \\
$^c$ Some exposure time was lost due to (solar) high soft proton rate. Average
ex\-po\-sure time is shown here, individual exposures for {\sc mos1}, {\sc mos2},
{\sc pn}, {\sc rgs1}, {\sc rgs2} are slightly different.
 \end{table}