\begin{table}%t1
\caption{\label{tabobs}Log of H$_2$O observations and production rates in comet C/2001~Q4 (NEAT) (average of AC1 and AC2+AOS data until 13 April).}
%\centering
\small
\begin{tabular}{rccrlccr}
\hline\hline\noalign{\smallskip}
UT date  & $\langle r_{h}\rangle$ & $\langle \Delta\rangle$ & Int. time & $\int T_b{\rm d}v^*$    & Velocity offset & Offset & $Q_{\rm app H_2O}$ \\[0cm]
[mm/dd.ddd] & [AU] & [AU]  &    [min]  & [K~km~s$^{-1}$] & [km~s$^{-1}$]   & [\arcsec] & [$10^{28}$~\mols]  \\
\hline
2004/03/06.552   & 1.519 & 1.734 &   2 &  $1.99\pm0.54$ & $-0.18\pm0.30$ & 51 & $17.90\pm5.54$ \\
        06.571   &       &       &  28 &  $2.61\pm0.16$ & $-0.01\pm0.06$ & 17 & $17.77\pm1.32$ \\
        06.631   &       & 1.733 &  96 &  $2.66\pm0.12$ & $+0.07\pm0.04$ & 17 & $18.13\pm0.97$ \\
2004/03/15.595   & 1.413 & 1.535 &   2 &  $2.11\pm0.48$ & $+0.46\pm0.25$ & 63 & $17.95\pm4.81$ \\
        15.611   &       &       &  30 &  $2.94\pm0.16$ & $+0.03\pm0.07$ & 18 & $16.09\pm1.12$ \\
        15.656   & 1.412 & 1.534 &   7 &  $3.12\pm0.32$ & $+0.27\pm0.10$ &  9 & $16.71\pm2.12$ \\
        15.671   &       &       &  90 &  $3.01\pm0.10$ & $+0.20\pm0.04$ & 18 & $16.58\pm0.70$ \\
2004/03/24.522   & 1.312 & 1.321 &  30 &  $3.96\pm0.20$ & $+0.14\pm0.06$ & 20 & $17.93\pm1.15$ \\
        24.528   &       &       &   8 &  $4.19\pm0.31$ & $+0.06\pm0.08$ & 17 & $19.19\pm1.78$ \\
        24.560   &       & 1.320 &   3 &  $2.43\pm0.52$ & $-0.23\pm0.24$ & 69 & $17.78\pm4.64$ \\
        24.581   & 1.311 & 1.319 &  93 &  $3.77\pm0.10$ & $+0.22\pm0.03$ & 19 & $16.70\pm0.58$ \\
        24.650   &       &       & 100 &  $3.87\pm0.10$ & $+0.16\pm0.03$ & 19 & $17.29\pm0.60$ \\
2004/04/02.559   & 1.217 & 1.089 &  31 &  $5.37\pm0.17$ & $+0.24\pm0.04$ & 24 & $18.52\pm0.79$ \\
        02.568   & 1.216 & 1.088 &  16 &  $5.80\pm0.24$ & $+0.23\pm0.05$ & 33 & $21.99\pm1.20$ \\
        02.608   &       &       &  20 &  $6.78\pm0.23$ & $+0.20\pm0.04$ & 21 & $24.71\pm1.15$ \\
        02.615   &       & 1.087 &  17 &  $5.55\pm0.25$ & $+0.23\pm0.05$ & 25 & $19.44\pm1.16$ \\
        02.625   &       &       &  31 &  $6.09\pm0.18$ & $+0.14\pm0.04$ & 24 & $21.79\pm0.85$ \\
        02.635   &       &       &  14 &  $5.04\pm0.26$ & $+0.27\pm0.06$ & 24 & $16.98\pm1.16$ \\
        02.643   &       & 1.086 &  19 &  $4.44\pm0.22$ & $-0.04\pm0.06$ & 29 & $14.92\pm0.97$ \\
        02.692   & 1.215 & 1.085 &   8 &  $5.13\pm0.38$ & $+0.19\pm0.08$ & 23 & $17.19\pm1.67$ \\
2004/04/13.536   & 1.114 & 0.792 &  15 & $11.33\pm0.27$ & $+0.14\pm0.03$ & 29 & $29.12\pm0.98$ \\
        13.541   &       &       &  15 & $10.41\pm0.27$ & $+0.12\pm0.03$ & 39 & $28.33\pm1.06$ \\
        13.594   & 1.113 & 0.791 &   8 & $12.46\pm0.41$ & $+0.25\pm0.05$ & 17 & $30.81\pm1.47$ \\
        13.607   &       &       &  80 & $10.14\pm0.11$ & $+0.11\pm0.01$ & 21 & $23.39\pm0.35$ \\
        13.611   &       &       &  32 &  $9.94\pm0.18$ & $+0.11\pm0.02$ & 21 & $22.77\pm0.57$ \\
        13.629   &       & 0.790 &  21 &  $9.01\pm0.23$ & $+0.15\pm0.03$ & 31 & $21.42\pm0.76$ \\
        13.672   &       & 0.789 &  21 &  $8.68\pm0.23$ & $+0.18\pm0.03$ & 36 & $21.24\pm0.78$ \\
        13.679   &       &       &  68 &  $5.51\pm0.11$ & $+0.18\pm0.03$ & 73 & $19.17\pm0.42$ \\
        13.688   &       & 0.788 &   9 &  $3.32\pm0.35$ & $+0.35\pm0.14$ &107 & $19.10\pm2.49$ \\
2004/04/26.682   & 1.019 & 0.454 &  38 & $18.87\pm0.21$ & $+0.15\pm0.02$ & 30 & $23.68\pm0.40$ \\
        26.745   & 1.019 & 0.452 &  48 & $19.14\pm0.17$ & $+0.16\pm0.02$ & 32 & $24.45\pm0.34$ \\
        26.811   & 1.018 & 0.451 &  48 & $18.43\pm0.15$ & $+0.16\pm0.02$ & 31 & $22.75\pm0.30$ \\
        26.878   & 1.018 & 0.449 &  48 & $18.88\pm0.16$ & $+0.14\pm0.02$ & 30 & $23.25\pm0.32$ \\
        26.947   & 1.018 & 0.448 &  48 & $19.66\pm0.16$ & $+0.17\pm0.01$ & 29 & $24.52\pm0.31$ \\
        27.012   & 1.017 & 0.446 &  48 & $19.60\pm0.17$ & $+0.15\pm0.02$ & 27 & $23.71\pm0.33$ \\
        27.080   & 1.017 & 0.445 &  48 & $19.68\pm0.15$ & $+0.18\pm0.01$ & 29 & $24.12\pm0.28$ \\
        27.138   & 1.017 & 0.444 &  30 & $21.70\pm0.28$ & $+0.19\pm0.02$ & 27 & $27.61\pm0.57$ \\
        27.214   & 1.016 & 0.442 &  48 & $21.00\pm0.13$ & $+0.16\pm0.01$ & 29 & $26.53\pm0.26$ \\
        27.259   & 1.016 & 0.441 & 0.3 & $18.55\pm1.40$ & $+0.13\pm0.10$ & 50 & $26.97\pm3.05$ \\
        27.395   & 1.015 & 0.438 &   1 & $15.97\pm0.98$ & $+0.19\pm0.11$ & 47 & $20.54\pm1.90$ \\
2004/04/29.962   & 1.002 & 0.388 &  49 & $22.17\pm0.19$ & $+0.12\pm0.02$ & 45 & $26.87\pm0.35$ \\
        30.029   & 1.002 & 0.386 &  49 & $21.33\pm0.17$ & $+0.14\pm0.02$ & 45 & $25.12\pm0.32$ \\
        30.096   & 1.001 & 0.385 &  49 & $20.64\pm0.17$ & $+0.11\pm0.02$ & 44 & $23.46\pm0.30$ \\
        30.163   & 1.001 & 0.384 &  49 & $21.24\pm0.17$ & $+0.15\pm0.01$ & 41 & $23.64\pm0.30$ \\
        30.230   & 1.000 & 0.383 &  49 & $21.34\pm0.16$ & $+0.14\pm0.01$ & 42 & $23.97\pm0.28$ \\
        30.297   & 1.000 & 0.381 &  49 & $20.84\pm0.17$ & $+0.13\pm0.02$ & 42 & $22.87\pm0.30$ \\
        30.364   & 1.000 & 0.380 &  48 & $22.43\pm0.16$ & $+0.19\pm0.01$ & 46 & $26.75\pm0.32$ \\
        30.431   & 1.000 & 0.379 &  48 & $23.07\pm0.16$ & $+0.15\pm0.01$ & 46 & $27.89\pm0.33$ \\
        30.498   & 0.999 & 0.378 &  48 & $25.52\pm0.18$ & $+0.19\pm0.01$ & 45 & $32.32\pm0.37$ \\
2004/05/01.617   & 0.994 & 0.359 &   2 &  $6.27\pm0.76$ & $+0.23\pm0.21$ &168 & $25.22\pm3.86$ \\
        01.704   & 0.994 & 0.359 &  45 & $22.66\pm0.19$ & $+0.15\pm0.02$ & 50 & $25.99\pm0.35$ \\
        01.771   & 0.994 & 0.358 &  46 & $22.11\pm0.19$ & $+0.18\pm0.02$ & 50 & $24.92\pm0.35$ \\
        01.838   & 0.993 & 0.357 &  46 & $22.23\pm0.19$ & $+0.21\pm0.02$ & 51 & $25.32\pm0.36$ \\
        01.905   & 0.993 & 0.356 &  46 & $21.68\pm0.18$ & $+0.16\pm0.02$ & 51 & $24.22\pm0.32$ \\
        01.970   & 0.993 & 0.355 &  42 & $22.29\pm0.19$ & $+0.18\pm0.02$ & 52 & $25.52\pm0.35$ \\
        02.039   & 0.992 & 0.354 &  46 & $23.43\pm0.19$ & $+0.15\pm0.02$ & 52 & $27.47\pm0.36$ \\
        02.106   & 0.992 & 0.353 &  46 & $25.64\pm0.18$ & $+0.14\pm0.01$ & 53 & $32.03\pm0.37$ \\
        02.173   & 0.992 & 0.353 &  46 & $26.55\pm0.21$ & $+0.12\pm0.01$ & 54 & $34.45\pm0.45$ \\
        02.240   & 0.992 & 0.352 &  46 & $26.12\pm0.18$ & $+0.15\pm0.01$ & 53 & $32.93\pm0.38$ \\
        02.307   & 0.991 & 0.351 &  46 & $25.23\pm0.19$ & $+0.13\pm0.01$ & 52 & $30.52\pm0.38$ \\
        02.374   & 0.991 & 0.350 &  45 & $23.72\pm0.18$ & $+0.11\pm0.01$ & 53 & $27.84\pm0.36$ \\
        02.442   & 0.991 & 0.349 &  49 & $23.48\pm0.17$ & $+0.15\pm0.01$ & 48 & $25.66\pm0.31$ \\
        02.510   & 0.990 & 0.348 &  50 & $22.21\pm0.16$ & $+0.14\pm0.01$ & 49 & $23.60\pm0.27$ \\
        02.556   & 0.990 & 0.348 & 0.3 & $22.72\pm1.61$ & $+0.22\pm0.10$ & 54 & $26.04\pm2.94$ \\
        02.715   & 0.990 & 0.346 &  25 & $21.39\pm0.20$ & $+0.19\pm0.02$ & 50 & $22.31\pm0.34$ \\
\hline
\end{tabular}

\begin{tabular}{rccrlccr}
\multicolumn{8}{c}{Log of H$_2$O observations  and production rates in comet C/2001~Q4 (NEAT) (AOS data only after 13 April) --  cont.} \\
\hline\hline\noalign{\smallskip}
UT date  & $\langle r_{h}\rangle$ & $\langle\Delta\rangle$ & Int. time & $\int T_b{\rm d}v^*$    & Velocity offset & Offset & $Q_{\rm appH_2O}$ \\[0cm]
[mm/dd.ddd] & [AU] & [AU]  &    [min]  & [K~km~s$^{-1}$] & [km~s$^{-1}$]   & [\arcsec] & [$10^{28}$~\mols]  \\
\hline
        02.778   & 0.989 & 0.345 &  50 & $23.52\pm0.15$ & $+0.13\pm0.01$ & 50 & $25.81\pm0.27$ \\
        02.845   & 0.989 & 0.344 &  49 & $24.56\pm0.16$ & $+0.15\pm0.01$ & 51 & $27.90\pm0.30$ \\
        02.896   & 0.989 & 0.344 &  10 & $24.44\pm0.37$ & $+0.21\pm0.03$ & 54 & $28.80\pm0.71$ \\
2004/05/15.858	& 0.962 & 0.432	&  13 &  $7.07\pm0.26$ & $+0.00\pm0.05$ & 140 & $29.25\pm1.51$ \\
	15.919  &	& 0.434 &  13 &  $8.42\pm0.30$ & $+0.14\pm0.05$ & 121 & $23.64\pm0.87$ \\
        15.923	&       & 0.434 &  13 & $13.13\pm0.34$ & $+0.03\pm0.04$ &  78 & $26.97\pm1.27$ \\
        15.986	&	& 0.435 &   5 & $19.05\pm0.56$ & $+0.13\pm0.05$ &  23 & $21.10\pm0.99$ \\
	15.986	&	& 0.435	&  15 & $13.40\pm0.23$ & $+0.15\pm0.02$ &  65 & $19.84\pm0.51$ \\
	15.986	&	& 0.435 &  12 &  $4.95\pm0.45$ & $+0.07\pm0.08$ & 123 & $14.20\pm1.42$ \\
	16.056  &	& 0.437 &  25 &  $7.13\pm0.18$ & $+0.11\pm0.03$ & 122 & $22.25\pm0.75$ \\
        16.057	&	& 0.437 &  13 & $16.05\pm0.37$ & $+0.04\pm0.04$ &  62 & $24.95\pm0.86$ \\
        16.120	&	& 0.439 &  20 &  $7.03\pm0.29$ & $+0.06\pm0.06$ & 126 & $22.84\pm1.22$ \\
2004/05/15.76-16.26&0.962& 0.436& 120 &  $3.50\pm0.10$ & $+0.03\pm0.04$ & 184 & $24.45\pm0.81$ \\
                &       & 0.436 &  83 &  $1.29\pm0.11$ & $+0.11\pm0.08$ & 231 & $15.36\pm1.40$ \\
2004/05/16.241	& 0.962 & 0.441	&  11 & $14.12\pm0.32$ & $+0.20\pm0.03$ &  22 & $13.72\pm0.46$ \\
        16.244	& 0.962 & 0.441	&  21 & $16.56\pm0.19$ & $+0.11\pm0.01$ &  23 & $17.42\pm0.31$ \\
\hline
\end{tabular}
\par
\medskip
$^*$ Line intensity corrected for beam losses (converted into main beam brightness
temperature) and integrated over its width.
\end{table}