\begin{table}%t2 \caption{\label{Tab2}Calibrated magnitudes of SN 1999ga. An additional detection limit in the $U$~band ($U$~$>$ 21.9) was obtained on 1999, December~29.} \small%\centerline { \begin{tabular}{ccccccc} \hline \hline Date & JD & $B$ & $V$ & $R$ & $I$ & Instrument \\ \hline 1999-11-19 & 2~451~502.29 & & 16.90 (0.08) & 16.11 (0.05) & 15.40 (0.04) & PARG \\ 1999-11-24 & 2~451~507.29 & & 17.00 (0.07) & 16.18 (0.06) & 15.46 (0.06) & PARG \\ 1999-11-26 & 2~451~509.02 & & 16.98 (0.04) & 16.18 (0.03) & 15.45 (0.04) & PARG \\ 1999-12-02 & 2~451~514.84 & & & 16.30 (0.03) & 15.58 (0.05) & PARG \\ 1999-12-10 & 2~451~522.79 & & 17.36 (0.25) & 16.46 (0.04) & 15.70 (0.14) & PARG \\ 1999-12-13 & 2~451~525.84 & & 17.53 (0.05) & 16.62 (0.04) & 15.86 (0.04) & PARG \\ 1999-12-20 & 2~451~532.87 & & 17.86 (0.07) & 17.05 (0.05) & 16.28 (0.07) & PARG \\ 1999-12-26 & 2~451~538.82 & 20.45 (0.07) & & & & WFI$^\star$ \\ 1999-12-29 & 2~451~541.77 & 21.03 (0.08) & 19.13 (0.03) & 18.05 (0.04) & 17.36 (0.06) & DF \\ 2000-01-01 & 2~451~546.27 & & 19.19 (0.42) & 18.11 (0.21) & 17.40 (0.32) & PARG $^\diamond$ \\ 2000-01-29 & 2~451~573.13 & 21.29 (0.30) & 19.57 (0.04) & 18.35 (0.07) & & AAT $^\ast$\\ 2000-02-17 & 2~451~591.67 & 21.46 (0.13) & 19.74 (0.07) & 18.42 (0.03) & & WFI$^\star$ \\ 2000-03-13 & 2~451~617.02 & & 20.0 (0.3) & 18.8 (0.3) & 18.4 (0.4) & DF$^\dag$ \\ 2000-03-14 & 2~451~617.5 & & 19.98 (0.07) & & & DF \\ 2000-04-07 & 2~451~641.57 & 21.89(0.05) & 20.26 (0.03) & 19.01 (0.07) & & EF2 \\ 2000-11-19 & 2~451~867.85 & & 22.55 (0.24) & 21.79 (0.21) & 20.69 (0.24) & DF \\ 2001-02-02 & 2~451~942.75 & $>$23.1 & 23.66 (0.38) & 23.02 (0.47) & & EF2 \\ 2001-02-04 & 2~451~944.63 & & $>$ 23.3 & $>$22.5 & & WFI \\ 2001-03-17 & 2~451~985.61 & $>$23.6 & $>$22.9 & $>$22.4 & $>$23.7 & DF \\ \hline \end{tabular}} \medskip $^\ast$ Anglo Australian Telescope Data Archive: \url{http://archive.ast.cam.ac.uk/arc-bin/wdb/aat_database/observation_log/make}; $^\star$~ESO Data Archive: \url{http://archive.eso.org/eso/eso_archive_main.html}; $^\diamond$~poor night; $^\dag$~spectrophotometric magnitude. \\ PARG = Perth-Lowell 0.61-m Cassegrain Telescope~+ CCD (Perth, Australia); EF2~= ESO 3.6~m Telescope~+ EFOSC2 (La~Silla, Chile); WFI~= ESO/MPI 2.2~m Telescope~+ Wide Field Imager (La~Silla, Chile); DF~= Danish 1.54~m Telescope~+ DFOSC (La~Silla, Chile). \end{table}