\begin{table}%t1 \caption{\label{obslog2}Log of photometric and spectroscopic observations of SN~2007rt.} %\centerline { \small \begin{tabular}{lclcccc} \hline \hline Date & Phase & Telescope/Instr & \multicolumn{3}{c}{Spectroscopy} & Photometry\\ &(days)* & & Grism & Wav. Range~(\AA)& Res. (\AA)&\\ \hline 28--11--2007 & 85 & ~~~~~~~~(1) & & & & $BVRC$ \\ 02--12--2007 & 89 & ~~~~~~~~(1) & & & & $BVRC$ \\ 05--12--2007 & 92 & ~~~~~~~~(2) & & & & $VC$ \\ 09--12--2007 & 96 & ~~~~~~~~(3) & & & & $C$ \\ 15--12--2007 & 102 & TNG/Dolores& LRB+LRR & 3200--9600 &17& $UBVRI$ (ph)\\ 19--12--2007 & 106 & Loiano1.52/BFOSC & gm4+gm5 & 3500--9600 &14&$BVR$(ph)\\ 13--01--2008 & 131 & NOT/ALFOSC & gm4 & 3300--8900 & 13.5& $UBVRI$\\ 04--02--2008 & 153 & WHT/ISIS & R1200R & 6000--6850 & 0.7 & \\ 11--02--2008 & 160 & TNG/Dolores & LRB+LRR & 3200--9600 & 9 & UBVRI\\ 29--03--2008 & 207 & Ekar1.82/AFOSC & & & & $BVRI$ \\ 30--03--2008 & 208 & NOT/ALFOSC & gm4 & 3300--8900 & 16.5 & $UBVRI$\\ 29--04--2008 & 238 & Loiano1.52/BFOSC & gm4+gm5 & 3600--8700 &13& \\ 01--05--2008 & 240 & CAHA/CAFOS & b200 & 3300--8900 & 13& $BVRI$ \\ 03--06--2008 & 273 & CAHA/CAFOS & b200 & 3300--8900 & 13 & $UBVRI$\\ 07--07--2008 & 307 & CAHA/CAFOS & & & & $UBVRI$ (ph)\\ 05--12--2008 & 458 & NOT/ALFOSC &&&& $R$ \\ 22--12--2008 & 475 & TNG/Dolores & LRR & 4950--9600& 13 & $BVRI$ \\ 13--01--2009 & 497 & TNG/Dolores & LRB & 3400--7750& 15 & $RI$ \\ 20--01--2009 & 504 & TNG/Dolores & & & & $R$ \\ 22--01--2009 & 506 & TNG/Dolores & LRB &3500--7900 & 12 & \\ 23--01--2009 & 507 & TNG/Dolores & LRB+LRR & 3400--9500 & 12 & $UBVR$ \\ 19--03--2009 & 562 & CAHA/CAFOS & & & & $BVRI$\\ \hline \end{tabular}} \medskip (1)~0.35m f/11 Schmidt-Cassegrain telescope+Kodak KAF-3200ME CCD, SLOOH, Teide Observatory; Canary Islands, Spain; (2)~0.25~m f/3.8 Takahashi Epsilon telescope E250+SBIG ST-8XE CCD -- Remote; Astronomical Society Observatory, New Mexico, USA; (3)~0.37~m f14 Cassegrain Iowa Robotic Telescope+; FLI~PL-09000~CCD, Winer Observatory, Arizona \& University of Iowa, USA; Phase refers to the number of days post-exposion, assuming a discovery date of 81~days post-explosion. \end{table}