\begin{table}%t1
\caption{\label{table_fragmentC}Component C: observations log and results in the broadband
red filter.} 
\small%\centerline
 {
\begin{tabular}{c c c c c c c c c c c c c}
\hline \hline
Date & Night & cc &UT& Filter & $r_{\rm h}$& $\Delta$ &PA & $\alpha$ &Af$\rho_{10 000}$&Af$\rho_{5000}$&Af$\rho_{4000}$ & $m$\\
2006 & & & & &(AU)& (AU)&(deg)&(deg)&(cm)&(cm)&(cm)& \\
\hline
Jan. 21 & mc&y &03:11--03:43& $R$& 1.98&1.42&287.7&28.0&50.1&66.2&70.3&--1.69\\
Feb. 07 & mc&y& 05:42--06:18& $R$& 1.82&1.11&281.6&27.9&62.1&77.9&81.7&--1.73\\
Mar. 04 & pp&n& 01:27--01:56& $R$& 1.59&0.73&266.1&26.5&102.2&117.2&120.2&--1.24\\
Mar. 31 & pc&y& 01:27--01:38& $R$& 1.34&0.40&235.3&27.4&175.0&200.6&206.0&--1.23\\
Apr. 05-06 & pc&y& 23:45--00:10& $R$& 1.28&0.34&227.7&29.1&256.2&278.1&285.1&--1.25\\
Apr. 11 & mc&y& 02:42--03:07& $R$& 1.24&0.29&221.9&31.3& s & s & s &--1.21\\
Apr. 13 & mc&y& 04:08--04:34& $R$& 1.22&0.27&219.9&32.5& s & s & s &--1.27\\
Apr. 16 & pc&y& 00:13--00:18& $R$& 1.20&0.25&217.5&34.3&244.4&266.2&272.8&--1.14\\
Apr. 26 & pp&n& 01:17--01:25& $R$& 1.12&0.16&215.0&43.7& s & s & s &--1.14\\
May 02 & pp&n& 01:27--01:35& $R$& 1.07&0.12&221.2&53.4& s & s & s &--1.05\\
May 08 & mc&n& 04:09--04:22& $R$& 1.03&0.09&237.7&70.5&--&178.9&180.4&--1.00\\
May 09 & pc&y& 03:55--04:05& $R$& 1.03&0.08&241.1&74.2&--&224.6&228.6&--1.07\\
May 10 & pc&n& 03:25--03:39& $R$& 1.02&0.08&244.3&78.0&--&--&--&--1.01\\
May 11 & pc&n& 01:32--01:56& $R$& 1.02&0.08&247.2&81.8&--&--&--&--1.04\\
May 12 & pp&n& 03:15--03:45& {\it BVRI}& 1.01&0.08&250.0&86.2&191.5&193.0&192.9&--1.00\\
May 13 & pp&n& 04:06--04:12& {\it BVRI}& 1.01&0.08&252.0&90.3&--&141.8&142.9&--1.03\\
May 14 & pp&n& 03:32--03:46& {\it URI}& 1.00&0.08&253.3&94.0&163.5&162.7&162.2&--0.97\\
May 16 & pc&y& 03:40--03:43& $R$& 0.99&0.08&254.2&100.5&--&110.6&110.5&--0.97\\
May 18 & pc&y& 03:35--03:49& $R$& 0.98&0.09&253.3&105.2&--&145.5&144.6&--0.98\\
May 24 & pc&y& 03:57--04:08& $R$& 0.96&0.13&246.8&110.5&141.2&150.0&151.0&--1.06\\
May 25 & pc&n& 03:40 & $R$& 0.96& 0.13& 245.8& 110.5&--&--&--&--0.91\\
\hline
\end{tabular}}
\medskip
Night: mc~= mostly clear, pp~= partially photometric, pc~= partially cloudy;
cc: presence (y) or absence (n) of cross-calibration;
$r_{\rm h}$ and $\Delta$ are the heliocentric and geocentric distance of the component during the observations, respectively;
PA~is the position angle of the extended Sun-component radius vector;
$\alpha$~is the phase angle Sun-component-observer;
Af$\rho$ values are derived for three photometric circular apertures with radius~10~000, 5000, and 4000~km from the comet's nucleus. Errors on Af$\rho$ are of the order of 10\% and are mainly due to
absolute flux calibration errors;
$m$: slope of the linear fit log~$B$~vs. log~$\rho$. Standard deviation of these fits is always lower than 1\%. The $m$~value on April~11, 13, 26, and May~2 were derived discarding the saturated
parts close to the optocenter of the images;
s: saturated image.
\end{table}