\begin{table} %T1
\caption{Journal of MuSiCoS spectropolarimetric observations of RR
Lyrae at the TBL. The heliocentric Julian Date is given at mid--exposure. The following two columns list the pulsation and Blazhko phases. The last column
lists the derived longitudinal magnetic field values and their
corresponding uncertainties.}
\label{t1} 
%\begin{center}
$$
\begin{tabular}{l c c c r@{$\;\pm\;$}l}
\hline\hline
&&&&\multicolumn{2}{c}{}\\[-10pt]
Date & HJD & Pulsation & Blazhko &\multicolumn{2}{c}{$B_\ell\pm\sigma_{\rm B}$}\\
 & $2~450~000+$ & phase & phase & \multicolumn{2}{c}{(G)} \\ 
&&&&\multicolumn{2}{c}{}\\[-10pt]
\hline
&&&&\multicolumn{2}{c}{}\\[-10pt]
99 Jul. 1 & 1361.4816 & 0.146 & 42.406 &87&103\\
99 Jul. 3 & 1362.5145 & 0.968 & 42.431 &114&136 \\
99 Jul. 4 & 1363.5597 & 0.812 & 42.457 &280&107 \\
00 Mar. 4 & 1608.7120 & 0.302 & 48.752 &--11&70 \\
00 Jun. 16 & 1712.4086 & 0.241 & 51.007&--28&57 \\
00 Jun. 17 & 1712.5277 & 0.451 & 51.010&37&44 \\
00 Jun. 27 & 1723.4398 & 0.701 & 51.278&87&66 \\ 
00 Jun. 28 & 1723.5545 & 0.904 & 51.280& 59 & 40 \\
00 Jun. 28 & 1724.4262 & 0.441 & 51.302& --47 & 33 \\
00 Jun. 29 & 1724.5373 & 0.638 & 51.305& --8 & 33 \\
00 Jul. 6 & 1732.4441 & 0.586 & 51.498 & 57 & 130 \\
00 Jul. 7 & 1732.5274 & 0.733 & 51.500 & --216 & 101 \\
00 Jul. 7 & 1732.6108 & 0.880 & 51.502 & --198 & 131 \\
00 Jul. 8 & 1733.5860 & 0.600 & 51.526 & 80 & 144 \\
00 Jul. 9 & 1734.5375 & 0.279 & 51.550 & --5 & 53 \\
00 Jul. 9 & 1734.6278 & 0.439 & 51.552 & --89 & 46 \\
01 Jul. 13 & 2103.5043 & 0.199 & 60.593& 29 & 73 \\
02 Jul. 06 & 2462.4108 & 0.370 & 69.390& --120 & 92 \\
02 Jul. 06 & 2462.4677 & 0.470 & 69.391& 21 & 121 \\
02 Jul. 07 & 2463.4143 & 0.141 & 69.414& 122 & 127 \\
02 Jul. 07 & 2463.4747 & 0.247 & 69.416& 51 & 103 \\
02 Jul. 31 & 2487.6172 & 0.839 & 70.007& 74 & 66 \\
02 Aut. 01 & 2488.5165 & 0.425 & 70.030& 73 & 61 \\
02 Aut. 01 & 2488.6346 & 0.633 & 70.032& 39 & 94 \\
02 Aut. 03 & 2490.5359 & 0.987 & 70.079& --105 & 58 \\
02 Aut. 04 & 2491.4998 & 0.688 & 70.103& --32 & 77 \\
02 Aut. 04 & 2491.5582 & 0.791 & 70.104& --39 & 109 \\
\hline
\end{tabular}$$
%\end{center}
\par
\end{table}