\begin{table}%t3
%%\centering
\par
\caption{\label{tab3}Previously published, reanalysed, and new mid-eclipse times of the white dwarf in   NN~Ser with residuals for the light-travel-time effect produced by the two planets of Model 2a. }
\begin{tabular}{r@{\hspace{8mm}}c@{\hspace{8mm}}c@{\hspace{8mm}}c@{\hspace{6mm}}r@{\hspace{6mm}}r@{\hspace{6mm}}c@{\hspace{6mm}}l}
\hline \hline\noalign{\smallskip}
$E$ & BJD(TT) & Error & Residual  & Error & Residual & References & Comment  \\
& JD 2~400~000$+$&(days) & (days) & (s)  & (s) \\ 
\hline 
0 	&  47~344.5246635 &    0.0003500  &  0.0000290 & 30.00 &  2.51 & (1) & Reanalysed\\
2760 &  47~703.5457436 &    0.0000020  &  0.0000012 &  0.17 &  0.10 & (2) & \\
  2761 &  47~703.6758326 &    0.0000060  &  0.0000101 &  0.52 &  0.87 & (2) & \\
  2769 &  47~704.7164596 &    0.0000030  & \hspace{-2.0mm}$-$0.0000038 &  0.26 & \hspace{-2.0mm}$-$0.33 & (3) & \\
  2776 &  47~705.6270226 &    0.0000030  & \hspace{-2.0mm}$-$0.0000016 &  0.26 & \hspace{-2.0mm}$-$0.14 & (3) & \\
  2777 &  47~705.7571046 &    0.0000070  &  0.0000003 &  0.60 &  0.03 & (3) &  Corrected\\
  2831 &  47~712.7815836 &    0.0001500  &  0.0001534 & 12.96 & 13.25 & (2) & \\
  2839 &  47~713.8222336 &    0.0001500  &  0.0001625 & 12.96 & 14.04 & (2) & \\
  7360 &  48~301.9141954 &    0.0001500  & \hspace{-2.0mm}$-$0.0000627 & 12.96 & --5.42 & (2) & \\
 28~152 &  51~006.5405495 &    0.0002000  &  0.0000605 & 17.28 &  5.23 & (2) & \\
 30~721 &  51~340.7165402 &    0.0000023  & \hspace{-2.0mm}$-$0.0000004 &  0.20 & \hspace{-2.0mm}$-$0.03 & (2) & Reanalysed\\
 33~233 &  51~667.4780058 &    0.0000960  &  0.0000041 &  8.29 &  0.35 & (4) & Reanalysed\\
 38~960 &  52~412.4470566 &    0.0000006  & \hspace{-2.0mm}$-$0.0000006 &  0.05 & \hspace{-2.0mm}$-$0.05 & (5) & \\
 38~961 &  52~412.5771382 &    0.0000005  &  0.0000008 &  0.04 &  0.07 & (5) & \\
 38~968 &  52~413.4876977 &    0.0000009  & \hspace{-2.0mm}$-$0.0000006 &  0.08 & \hspace{-2.0mm}$-$0.05 & (5) & Corrected\\
 38~976 &  52~414.5283389 &    0.0000007  & \hspace{-2.0mm}$-$0.0000004 &  0.06 & \hspace{-2.0mm}$-$0.03 & (5) & \\
 38~984 &  52~415.5689804 &    0.0000007  &  0.0000000 &  0.06 &  0.00 & (5) & \\
 41~782 &  52~779.5331703 &    0.0000015  &  0.0000001 &  0.13 &  0.01 & (5) & \\
 41~798 &  52~781.6144523 &    0.0000007  &  0.0000002 &  0.06 &  0.02 & (5) & \\
 41~806 &  52~782.6550927 &    0.0000008  & \hspace{-2.0mm}$-$0.0000004 &  0.07 & \hspace{-2.0mm}$-$0.03 & (5) & \\
 41~820 &  52~784.4762150 &    0.0000008  &  0.0000003 &  0.07 &  0.03 & (5) & \\
 44~472 &  53~129.4486808 &    0.0000040  &  0.0000008 &  0.35 &  0.07 & (5) & \\
 44~473 &  53~129.5787632 &    0.0000028  &  0.0000031 &  0.24 &  0.27 & (5) & \\
 44~474 &  53~129.7088370 &    0.0000017  & \hspace{-2.0mm}$-$0.0000032 &  0.15 & \hspace{-2.0mm}$-$0.28 & (5) & \\
 44~480 &  53~130.4893234 &    0.0000030  &  0.0000025 &  0.26 &  0.22 & (5) & \\
 49~662 &  53~804.5644567 &    0.0000025  &  0.0000001 &  0.22 &  0.01 & (5) & \\
 49~663 &  53~804.6945350 &    0.0000012  & \hspace{-2.0mm}$-$0.0000017 &  0.10 & \hspace{-2.0mm}$-$0.15 & (5) & \\
 49~671 &  53~805.7351781 &    0.0000006  &  0.0000005 &  0.05 &  0.04 & (5) & \\
 53~230 &  54~268.6903114 &    0.0000006  &  0.0000008 &  0.05 &  0.07 & (5) & \\
 53~237 &  54~269.6008713 &    0.0000002  & \hspace{-2.0mm}$-$0.0000001 &  0.02 & \hspace{-2.0mm}$-$0.01 & (5) & \\
 56~442 &  54~686.5076279 &    0.0000009  & \hspace{-2.0mm}$-$0.0000001 &  0.08 & \hspace{-2.0mm}$-$0.01 & (5) & \\
 58~638 &  54~972.1634971 &    0.0000800  & \hspace{-2.0mm}$-$0.0000380 &  6.91 & --3.28 & (6) & \\
 58~645 &  54~973.0740553 &    0.0001000  & \hspace{-2.0mm}$-$0.0000406 &  8.64 & --3.51 & (6) & \\
 58~684 &  54~978.1471791 &    0.0001200  & \hspace{-2.0mm}$-$0.0000408 & 10.37 & --3.53 & (6) & \\
 58~745 &  54~986.0820789 &    0.0001200  & \hspace{-2.0mm}$-$0.0000274 & 10.37 & --2.37 & (6) & \\
 58~753 &  54~987.1228359 &    0.0001300  &  0.0000887 & 11.23 &  7.66 & (6) & \\
 58~796 &  54~992.7161925 &    0.0000015  &  0.0000008 &  0.13 &  0.07 & (6) & \\
 60~489 &  55~212.9418187 &    0.0000069  &  0.0000027 &  0.60 &  0.23 & (7,8) & \\
 60~505 &  55~215.0230961 &    0.0000066  & \hspace{-2.0mm}$-$0.0000017 &  0.57 & \hspace{-2.0mm}$-$0.15 & (7,8) & \\
 60~528 &  55~218.0149380 &    0.0000043  & \hspace{-2.0mm}$-$0.0000024 &  0.37 & \hspace{-2.0mm}$-$0.21 & (7,8) & \\
 60~735 &  55~244.9415254 &    0.0000029  &  0.0000012 &  0.25 &  0.10 & (7,8) & \\
 60~743 &  55~245.9821654 &    0.0000032  &  0.0000003 &  0.28 &  0.03 & (7,8) & \\
 60~751 &  55~247.0228063 &    0.0000034  &  0.0000002 &  0.29 &  0.02 & (7,8) & \\
 60~774 &  55~250.0146469 &    0.0000034  & \hspace{-2.0mm}$-$0.0000018 &  0.29 & \hspace{-2.0mm}$-$0.16 & (7,8) & \\
 60~927 &  55~269.9169047 &    0.0000014  & \hspace{-2.0mm}$-$0.0000018 &  0.12 & \hspace{-2.0mm}$-$0.16 & (7,9) & \\
 60~950 &  55~272.9087487 &    0.0000013  & \hspace{-2.0mm}$-$0.0000005 &  0.11 & \hspace{-2.0mm}$-$0.04 & (7,9) & \\
 61~219 &  55~307.9003015 &    0.0000010  &  0.0000005 &  0.09 &  0.04 & (7,10) & \\
 61~426 &  55~334.8268834 &    0.0000018  & \hspace{-2.0mm}$-$0.0000025 &  0.16 & \hspace{-2.0mm}$-$0.22 & (7,9) & \\
 61~440 &  55~336.6480059 &    0.0000018  & \hspace{-2.0mm}$-$0.0000017 &  0.16 & \hspace{-2.0mm}$-$0.15 & (7,9) & \\
 61~441 &  55~336.7780894 &    0.0000015  &  0.0000017 &  0.13 &  0.15 & (7,9) & \\
 61~564 &  55~352.7779443 &    0.0000016  &  0.0000017 &  0.14 &  0.15 & (7,9) & \\
 61~579 &  55~354.7291448 &    0.0000009  &  0.0000004 &  0.08 &  0.03 & (7,10) & \\  
\hline 
\end{tabular}
\tablefoot{The published mid-eclipse times have been converted to BJD(TT) if not yet on this time standard.}\vspace{-2mm}
\tablebib{(1)  Haefner et~al. (1989); ESO Msngr, 55, 61, reanalysed using up-to-date eclipse profile; (2) \cite{haefneretal04}, misprint for $E=2777$
corrected, VLT trailed imaging observation ($E=30721$) reanalysed using
the original data; (3)~\cite{wood91}; (4)~\cite{pigulskimachalska02}, reanalysed using the original
data; (5)~\cite{parsonsetal10b}, timing for $E=38~968$ corrected for
misprint; (6)~\cite{qianetal09}; (7)~this work; (8)~MONET/North 1.2-m
white light photometry; (9)~McDonald 2.1-m photometry with Schott $BG40$~filter; (10)~ESO NTT 3.5-m ULTRACAM Sloan $g'$ photometry.}
\end{table}