\begin{table}%tB.3
\caption{Optical observations carried out for GRB~050408. The magnitudes are
in the Vega system and are not corrected for Galactic reddening.}
%\centering
\small
\begin{tabular}{cccccc}
\hline
\hline
 ($t-t_0$) (days)& Tel. + Inst.   &  Filter  & $T$exp (s)  &  Mag  & ErMag\\
\hline
0.4780   & Dk1.54 m+DFOSC    & $U$        & 9000      & 23.09 & 0.18 \\
1.5939   & 4.0 mKPNO         & $U$        & 1600      & 23.75 & 0.26 \\
\hline
0.1297   & 6.0 mBTA+SCORPIO  & $B$        & 600       & 22.37 & 0.05 \\
0.1385   & 6.0 mBTA+SCORPIO  & $B$        & 500       & 22.44 & 0.05 \\
0.1467   & 6.0 mBTA+SCORPIO  & $B$        & 600       & 22.46 & 0.05 \\
0.1554   & 6.0 mBTA+SCORPIO  & $B$        & 600       & 22.55 & 0.05 \\
0.2301   & 6.0 mBTA+SCORPIO  & $B$        & 500       & 22.79 & 0.07 \\
0.3712   & Dk1.54 m+DFOSC    & $B$        & 1200      & 23.05 & 0.10 \\
0.5681   & Dk1.54 m+DFOSC    & $B$        & 1200      & 23.54 & 0.17 \\
1.5001   & Dk1.54 m+DFOSC    & $B$        & 9000      & 24.26 & 0.10 \\
242.5213 & 3.5 mCAHA         & $B$        & 1800      & 25.32$^4$ & 0.22 \\
\hline
0.2245   & 6.0 mBTA+SCORPIO  & $V$        & 300       & 22.11 & 0.06 \\
0.3599   & Dk1.54 m+DFOSC    & $V$        & 600       & 22.24 & 0.09 \\
1.6206   & 4.0 mKPNO         & $V$        & 1200      & 23.98 & 0.22 \\
2.4394   & 4.0 mCTIO         & $V$        & 1500      & 24.10 & 0.17 \\
\hline
0.0155   & Kiso 1.05 Schmidt& $R$c        & 300       &$>$19.50& --  \\
0.0388   & 1.0 mLOT          & $R$c$^5$        & 180       & 20.34 & 0.10 \\
0.0859   & 1.0 mZeiss        & $R$c        & 900       & 20.99 & 0.09 \\
0.0919   & 1.0 mLOT          & $R$c$^{5}$  & 180       & 20.80 & 0.18 \\
0.0956   & 1.0 mLOT          & $R$c$^{5}$  & 300       & 20.98 & 0.14 \\
0.1029   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 20.92 & 0.03 \\
0.1068   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 20.94 & 0.03 \\
0.1104   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 20.92 & 0.03 \\
0.1139   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 20.92 & 0.02 \\
0.1172   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 20.95 & 0.02 \\
0.1207   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 21.03 & 0.03 \\
0.1240   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 21.05 & 0.03 \\
0.1471   & RTT150+TFOSC     & $R$c        & 450       & 21.13 & 0.08 \\
0.1629   & RTT150+TFOSC     & $R$c        & 450       & 21.05 & 0.06 \\
0.1771   & RTT150+TFOSC     & $R$c        & 540       & 21.10 & 0.06 \\
0.1863   & RTT150+TFOSC     & $R$c        & 540       & 21.19 & 0.06 \\
0.1984   & RTT150+TFOSC     & $R$c        & 480       & 21.42 & 0.08 \\
\hline
0.2080   & RTT150+TFOSC     & $R$c        & 480       & 21.40 & 0.08 \\
0.2175   & RTT150+TFOSC     & $R$c        & 480       & 21.39 & 0.09 \\
0.2204   & 6.0 mBTA+SCORPIO  & $R$c        & 180       & 21.32 & 0.04 \\
0.2296   & RTT150+TFOSC     & $R$c        & 480       & 21.19 & 0.06 \\
0.2380   & RTT150+TFOSC     & $R$c        & 480       & 21.52 & 0.09 \\
0.2463   & RTT150+TFOSC     & $R$c        & 480       & 21.56 & 0.08 \\
0.2742   & RTT150+TFOSC     & $R$c        & 720       & 21.52 & 0.06 \\
0.2867   & RTT150+TFOSC     & $R$c        & 720       & 21.58 & 0.06 \\
0.3392   & RTT150+TFOSC     & $R$c        & 600       & 21.80 & 0.12 \\
0.3496   & RTT150+TFOSC     & $R$c        & 600       & 21.50 & 0.09 \\
0.3540   & Dk1.54 m+DFOSC    & $R$c        & 300       & 21.81 & 0.13 \\
0.3600   & RTT150+TFOSC     & $R$c        & 600       & 21.84 & 0.14 \\
0.3705   & RTT150+TFOSC     & $R$c        & 600       & 21.95 & 0.15 \\
0.4362   & Dk1.54 m+DFOSC    & $R$c        & 600       & 21.91 & 0.08 \\
0.5366   & Dk1.54 m+DFOSC    & $R$c        & 900       & 22.00 & 0.07 \\
0.5963   & Dk1.54 m+DFOSC    & $R$c        & 1200      & 22.02 & 0.08 \\
0.7166   & 2.0 mFTN          & $R$c        & 2400      & 22.50 & 0.11 \\
1.4024   & Dk1.54 m+DFOSC    & $R$c        & 5700      & 23.08 & 0.09 \\
1.5864   & Dk1.54 m+DFOSC    & $R$c        & 3600      & 23.31 & 0.14 \\
2.4911   & Dk1.54 m+DFOSC    & $R$c        & 14~700     & 23.86 & 0.17 \\
3.4506   & Dk1.54 m+DFOSC    & $R$c        & 14~000     & 23.85 & 0.13 \\
5.1575   & RTT150+ANDOR CCD & $R$c        & 9000      & 23.70 & 0.20 \\
5.5124   & Dk1.54 m+DFOSC    & $R$c        & 7200      & 23.72 & 0.18 \\
7.4663   & Dk1.54 m+DFOSC    & $R$c        & 15~600     & 23.97 & 0.11 \\
30.2567  & 3.5 mTNG          & $R$c        & 3600      & 24.64 & 0.17 \\
242.4885 & 3.5 mCAHA         & $R$c        & 2500      & 24.60$^4$ & 0.15 \\
\hline
0.3871   & Dk1.54 m+DFOSC    & $I$c        & 1200      & 21.25 & 0.07 \\
0.6137   & Dk1.54 m+DFOSC    & $I$c        & 1500      & 22.52 & 0.11 \\
6.4766   & Dk1.54 m+DFOSC    & $I$c        & 13~800     & 23.50 & 0.18 \\
242.5446 & 3.5 mCAHA         & $I$c        & 1500      &$>$24.0& --  \\
\hline
--0.00340 & WIDGET           & Unfiltered& 95        &$>$9.7& --  \\
--0.00224 & WIDGET           & Unfiltered& 95        &$>$9.7& --  \\
--0.00108 & WIDGET           & Unfiltered& 95        &$>$9.7& --  \\
0.00007  & WIDGET           & Unfiltered& 95        &$>$9.8& --  \\
0.00123  & WIDGET           & Unfiltered& 95        &$>$9.7& --  \\
\hline
\end{tabular}
\medskip
$^4$ Host galaxy magnitude. \\
$^5$ {\it VR} broad band filter was transformed to {\it R}c.
\end{table}