\begin{table}%A1
\caption{\label{tab:adboo_tminp}
Times of $primary$ minima for AD~Boo.
O$-$C values are calculated for the
ephemeris given in Eq.~(\ref{eq:adboo_eph}) assuming a circular orbit. 
Observing methods are: PG photographic; V visual; PE photoelectric or CCD.
Times marked with an asterisk were published after we completed the
ephemeris calculations; including them makes no significant changes.}
\small%\centering
\par
\begin{tabular}{lllrlc}
\hline\hline
HJD          & rms     &  rms     &   O$-$C     &Observing&  Reference  \\
$-$ 2~400~000& publ. &  adopt.  & days      &method   &             \\
\hline
  15~552.681  &         &   0.0320 &    0.0426 &   PG &  S68        \\ 
  16~576.720  &         &   0.0320 &    0.0221 &   PG &  --          \\ 
  16~605.709  &         &   0.0320 &    0.0478 &   PG &  --          \\ 
  16~880.830  &         &   0.0320 &    0.0175 &   PG &  --          \\ 
  17~329.796  &         &   0.0320 &    0.0524 &   PG &  --          \\ 
  17~660.792  &         &   0.0320 &    0.0393 &   PG &  --          \\ 
  19~439.923  &         &   0.0320 & $-$0.0038 &   PG &  --          \\ 
  20~244.712  &         &   0.0320 &    0.0193 &   PG &  --          \\ 
  23~612.695  &         &   0.0320 & $-$0.0156 &   PG &  --          \\ 
  23~612.706  &         &   0.0320 & $-$0.0046 &   PG &  --          \\ 
  26~190.436  &         &   0.0320 & $-$0.0082 &   PG &  S63        \\ 
  26~767.648  &         &   0.0320 &    0.0067 &   PG &  --          \\ 
  27~183.483  &         &   0.0320 &    0.0114 &   PG &  --          \\ 
  27~212.436  &         &   0.0320 &    0.0011 &   PG &  --          \\ 
  27~609.605  &         &   0.0320 & $-$0.0408 &   PG &  S68        \\ 
  28~219.931  &         &   0.0320 & $-$0.0129 &   PG &  --          \\ 
  28~962.610  &         &   0.0320 & $-$0.0356 &   PG &  S63        \\ 
  29~014.430  &         &   0.0320 &    0.0642 &   PG &  --          \\ 
  30~439.803  &         &   0.0320 &    0.0292 &   PG &  S68        \\ 
  32~659.663  &         &   0.0320 &    0.0592 &   PG &  --          \\ 
  33~023.667  &         &   0.0320 & $-$0.0468 &   PG &  --          \\ 
  37~016.535  &         &   0.0320 &    0.0236 &   PG &  S63        \\ 
  37~018.539  &         &   0.0320 & $-$0.0412 &   PG &  --          \\ 
  37~018.585  &         &   0.0320 &    0.0048 &   PG &  --          \\ 
  37~351.647  &         &   0.0320 & $-$0.0112 &   PG &  --          \\ 
  40~711.396  &         &   0.0150 & $-$0.0048 &   V  &  O119 (1970), VB74 \\ 
  41~042.409  &         &   0.0150 & $-$0.0009 &   V  &  O124 (1971) \\ 
  41~042.411  &         &   0.0150 &    0.0011 &   V  &  --          \\ 
  41~048.614  &         &   0.0150 & $-$0.0024 &   V  &  --          \\ 
  41~071.381  &         &   0.0150 &    0.0078 &   V  &  O125 (1971), VB74 \\ 
  41~104.453  &         &   0.0150 & $-$0.0211 &   V  &  --          \\ 
  41~135.498  &         &   0.0150 & $-$0.0083 &   V  &  O126 (1971) \\ 
  41~135.503  &         &   0.0150 & $-$0.0033 &   V  &  --          \\ 
  41~162.412  &         &   0.0150 &    0.0113 &   V  &  --          \\ 
  41~402.385  &         &   0.0150 &    0.0026 &   V  &  B3 (1972), VB74 \\ 
  41~402.393  &         &   0.0150 &    0.0106 &   V  &  B4 (1972), VB74 \\ 
  41~433.423  &         &   0.0150 &    0.0085 &   V  &  B3 (1972), VB74 \\ 
  41~764.378  &         &   0.0150 & $-$0.0456 &   V  &  B8 (1973), VB74 \\ 
  41~764.413  &         &   0.0150 & $-$0.0106 &   V  &  --          \\ 
  41~795.459  &         &   0.0150 &    0.0033 &   V  &  B9 (1973), VB74 \\  
  41~824.387  &         &   0.0150 & $-$0.0320 &   V  &  --          \\  
  41~853.381  &         &   0.0150 & $-$0.0013 &   V  &  B10 (1973), VB74 \\  
  42~186.454  &         &   0.0150 & $-$0.0062 &   V  &  B15 (1974)  \\  
  42~275.417  &         &   0.0150 & $-$0.0019 &   V  &  B17 (1974)  \\  
  42~614.686  &         &   0.0150 & $-$0.0173 &   V  &  BA78       \\ 
  42~860.8760 &         &   0.0150 & $-$0.0153 &   V  &  BS97       \\ 
  42~937.427  &         &   0.0150 & $-$0.0102 &   V  &  B28 (1976)  \\ 
  42~997.442  &         &   0.0150 &    0.0094 &   V  &  B29 (1976)  \\ 
  44~079.417  &         &   0.0150 & $-$0.0017 &   V  &  B44 (1979)  \\ 
  44~704.1985 & 0.0005  &   0.0007 &    0.0001 &   PE &  Z83        \\ 
  44~731.0935 & 0.0005  &   0.0007 &    0.0006 &   PE &  --          \\ 
  44~766.2627 & 0.0003  &   0.0004 &    0.0001 &   PE &  --          \\ 
  45~074.5133 & 0.0005  &   0.0035 & $-$0.0016 &   PE &  B60 (1982)  \\  
  45~082.781  &         &   0.0150 & $-$0.0091 &   V  &  BS97       \\ 
  45~101.407  &         &   0.0150 & $-$0.0024 &   V  &  B60 (1982)  \\ 
  45~442.761  &         &   0.0150 & $-$0.0015 &   V  &  BS97       \\ 
  46~216.495  &         &   0.0150 & $-$0.0014 &   V  &  I86        \\ 
  46~216.508  &         &   0.0150 &    0.0117 &   V  &  --          \\ 
  46~907.472  &         &   0.0150 & $-$0.0059 &   V  &  --          \\ 
  \hline
  46~963.339  &         &   0.0150 &    0.0033 &   V  &  B84 (1987)  \\ 
  47~161.910  &         &   0.0150 & $-$0.0312 &   V  &  BS97       \\ 
  47~219.865  &         &   0.0150 & $-$0.0028 &   V  &  --          \\ 
  47~246.7620 & 0.0010  &   0.0014 & $-$0.0003 &   PE &  This paper \\ 
  47~248.8312 & 0.0002  &   0.0003 &    0.0001 &   PE &  --          \\ 
  47~383.313  &         &   0.0150 &    0.0095 &   V  &  B89 (1988)  \\ 
  47~579.8410 & 0.0010  &   0.0014 &    0.0008 &   PE &  This paper \\ 
  48~026.7022 & 0.0002  &   0.0003 & $-$0.0003 &   PE &  --          \\ 
  48~357.704  &         &   0.0150 & $-$0.0076 &   V  &  BS97       \\ 
  48~407.372  & 0.001   &   0.0043 &    0.0090 &   PE &  B98 (1991)  \\ 
  48~438.3944 & 0.0006  &   0.0009 & $-$0.0007 &   PE &  --          \\ 
  49~501.7627 & 0.0003  &   0.0004 &    0.0008 &   PE &  BS97       \\ 
  52~745.6521 & 0.0012  &   0.0017 &    0.0007 &   PE &  MK04       \\ 
  52~758.0641 &         &   0.0035 & $-$0.0001 &   PE &  N04        \\ 
  53~006.3222 &         &   0.0035 &    0.0011 &   PE &  N05        \\ 
  53~124.2389 &         &   0.0035 & $-$0.0042 &   PE &  --          \\ 
  53~461.4575*& 0.0004  &          & $-$0.0011 &   PE &  H06        \\ 
  53~463.5256*& 0.0013  &          & $-$0.0018 &   PE &  D05        \\ 
\hline
\end{tabular}%\end{center}
\par
\smallskip
References are:
B = BBSAG Bulletin, followed by volume number and year of publication;
BA78 = Baldwin (\cite{ba78});
BS97 = Baldwin \& Samolyk~(\cite{bs97});
D05 = Diethelm (\cite{d05});
H06 = H\"ubscher et~al. (\cite{h06});
I86 = Isles (\cite{i86});
MK04 = Maciejewski \& Karska (\cite{mk04});
N04 = Nagai (\cite{n04});
N05 = Nagai (\cite{n05});
O = Orion (Diethelm \& Locker \cite{dl70a}, \cite{dl71a}$-$c), 
followed by volume number and year of publication;
S63~= Strohmeier et~al. (\cite{sm63});
S68 = Strohmeier et~al. (\cite{sm68});
VB74 = van Buren (\cite{vb74}); his data are taken from B and O;
Z83 = Zhai et~al. (\cite{zhai83}).
\end{table}