\documentstyle{article}
\begin{document}

\flushleft
\begin{table} %t1
\caption{\label{info}General information regarding
the observations on which the selection (Wise Observatory) and the 
calibration (Skinakas and~SAAO Observatories) of the secondary
photometric  standard stars was based. 
Columns three and four list the starting/ending
dates  of the observations at Wise Observatory. Column five gives the
total number of frames  used for the detection of the non-variable
stars~($N_{\rm Det}$).  The number of nights at SAAO and Skinakas used for
the calibration to the Johnson-Counsins  
photometric system~($N_{\rm Cal}$) are listed in column six. Column~7 gives  the total
number of exposures in $B,V,R_{\rm c},I_{\rm c}$ respectively, used for the 
calibration~($N_{\rm Exp}$) and Col.~8 lists the dates in which the
photometric calibration has been carried out. 
For the photometric
calibration, systems~7, 8, 13 and~14  were observed at~SAAO, while the
other systems were observed at Skinakas. } 
%\centering
\flushleft
\par
\begin{tabular}{llccrrcl}
\hline
\hline\noalign{\smallskip}
No        & 
Object    &   
St. date  & 
En. date  & 
$N_{\rm Det}$ & 
$N_{\rm Cal}$ & 
$N_{\rm Exp}$ & Dates \\ 
%(1) & (2) & (3) & (4) & (5) & (6) & (7) & (8) {\rule[-3mm]{0mm}{5mm}} \\
\noalign{\smallskip}\hline\noalign{\smallskip}
 1   & UM~673            & 2000 Aug. 23   & 2001 Sep. 24  &    30 & 3 & 11/11/11/11  & 29/08/01, 10/09/01, 15/11/01       \\
 2   & B~0218$+$357      & 2000 Jul. 20   & 2002 Mar. 01  &    79 & 4 & 12/12/12/12  & 29/08/01, 10/09/01, 30/10/01, 15/11/01  \\
 3   & MG~0414$+$0534    & 1999 Dec. 25   & 2000 Mar. 30  &     5 & 4 & 12/12/12/12  & 29/08/01, 10/09/01, 30/10/01, 15/11/01   \\
 4   & APM~08279$+$52    & 1999 Dec. 24   & 2002 Apr. 18  &   133 & 3 & 09/09/09/09  & 30/10/01, 19/05/02, 20/05/02        \\
 5   & SBS~0909$+$53     & 1999 Dec. 24   & 2002 Mar. 03  &    76 & 2 & 06/06/06/06  & 30/10/01, 21/05/02     \\
 6   & FBQ~0951$+$263    & 1999 Dec. 29   & 2002 Mar. 03  &    50 & 1 & 03/03/03/03  & 30/10/01                  \\
 7   & LBQS~1009$-$02    & 1999 Dec. 29   & 2002 Apr. 04  &    49 & 2 & 04/04/04/04  & 17/05/02, 18/05/02 \\
 8   & Q~1017$-$207      & 1999 Dec. 29   & 2002 Mar. 03  &    35 & 2 & 04/04/04/04  & 16/05/02, 17/05/02           \\
 9   & B~1152$+$200      & 1999 Dec. 30   & 2002 May 09  &    70 & 2 & 06/06/06/06  & 19/05/02, 20/05/02           \\
10   & B~1422$+$231      & 2000 Jan. 13   & 2002 Apr. 18  &   102 & 2 & 06/05/04/04  & 29/08/01, 10/09/01           \\
11   & SBS~1520$+$530    & 1998 Jan. 18   & 2002 Mar. 03  &    98 & 2 & 06/06/06/06  & 29/08/01, 10/09/01           \\
12   & FBQ~1633$+$3134   & 2001 Jan. 15   & 2002 Jun. 12  &    81 & 2 & 04/04/03/05  & 29/08/01, 10/09/01           \\
13   & PMNJ~1838$-$3427  & $-$            & $-$          &   $-$ & 3 & $-$/11/10/10 & 16/05/02, 17/05/02, 18/05/02  \\
14   & HE~2149$-$2745    & 2000 May 24   & 2001 Aug. 29  &    69 & 3 & 08/08/09/08  & 16/05/02, 17/05/02, 18/05/02  \\
\hline
\end{tabular}
\end{table}

\clearpage
\begin{table}%T2
\caption{\label{colors-sfs}Photometry and astrometry for the new set of secondary
photometric standard stars in the fields of 14~gravitational lenses. 
Their coordinates, presented in
columns  three and four, were calculated relative to  the USNO$-$A2.0
catalog (Monet \cite{monet98}). The units of the right ascension are hours, 
minutes and seconds and the units of the declination are degrees,
arcminutes and arcseconds; the equinox is J2000 and the epoch of the
astrometric observations is the year~2000$\pm$1. The astrometry for
the stars in the field of PMNJ~1838$-$3427 was adopted from Table~6
of Winn et~al. (\cite{winn00}).  
The magnitudes and colors are {\it mean over the epochs}
values  (see Col.~8 of Table~\ref{info}), accompanied by the
standard deviation of the mean. They don't include any systematics
related to the photometric calibration, which are of the order of~0.02~mag.}
\centerline
{
\begin{tabular}{llllcccc}
\noalign{\smallskip}
\hline
\hline\noalign{\smallskip}
Object     &
No         &
RA (2000)  & 
Dec (2000) &
$V$        &
$B-V$      &
$V-R$      &
$V-I$     \\
\noalign{\smallskip}\hline\noalign{\smallskip}		 & 1    & 01 45 12.25   &  $-$~09 47 48.9   & 16.543  $\pm$  0.004 &  0.892  $\pm$  0.037 &  0.544  $\pm$  0.005 &  0.999  $\pm$  0.006 \\
		 & 2    & 01 45 07.36   &  $-$~09 49 00.5   & 17.700  $\pm$  0.019 &  1.403  $\pm$  0.083 &  0.975  $\pm$  0.021 &  2.245  $\pm$  0.018 \\
UM~673          & 3    & 01 45 08.91   &  $-$~09 43 12.0   & 17.503  $\pm$  0.023 &  0.561  $\pm$  0.039 &  0.307  $\pm$  0.027 &  0.657  $\pm$  0.023 \\
(Q~0142$-$100)  & 4    & 01 45 03.62   &  $-$~09 44 16.9   & 18.344  $\pm$  0.029 &  1.497  $\pm$  0.162 &  0.914  $\pm$  0.031 &  1.680  $\pm$  0.028 \\
		 & 5    & 01 44 57.90   &  $-$~09 44 08.5   & 18.497  $\pm$  0.023 &  1.443  $\pm$  0.133 &  0.981  $\pm$  0.027 &  1.981  $\pm$  0.020 \\
		 & 6    & 01 44 56.26   &  $-$~09 44 14.7   & 18.257  $\pm$  0.020 &  0.804  $\pm$  0.089 &  0.369  $\pm$  0.032 &  0.728  $\pm$  0.025 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
B~0218$+$357       & 1    & 02 21 16.49   &  $+$~35 56 33.6   & 17.076  $\pm$  0.015 &  0.644  $\pm$  0.020 &  0.403  $\pm$  0.015 &  0.756  $\pm$  0.014 \\
		   & 2    & 02 21 04.58   &  $+$~35 58 25.0   & 16.131  $\pm$  0.006 &  0.620  $\pm$  0.016 &  0.360  $\pm$  0.004 &  0.714  $\pm$  0.009 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
		   & 1    & 04 14 51.96   &  $+$~05 35 29.9   & 17.776  $\pm$  0.011 &  1.061  $\pm$  0.043 &  0.578  $\pm$  0.017 &  1.103  $\pm$  0.012 \\
MG~0414$+$0534     & 2    & 04 14 42.87   &  $+$~05 36 41.9   & 17.491  $\pm$  0.015 &  0.800  $\pm$  0.033 &  0.448  $\pm$  0.019 &  0.937  $\pm$  0.012 \\
		   & 3    & 04 14 42.45   &  $+$~05 31 18.5   & 18.194  $\pm$  0.031 &  0.793  $\pm$  0.069 &  0.477  $\pm$  0.017 &  1.045  $\pm$  0.039 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
APM~08279$+$52     & 1    & 08 31 22.28   &  $+$~52 44 58.6   & 15.003  $\pm$  0.006 &  0.926 $\pm$ 0.009  & 0.531$\pm$  0.004 &  0.981  $\pm$  0.005\\              
		   & 2    & 08 31 24.24   &  $+$~52 48 33.0   & 15.733  $\pm$  0.012 &  1.091  $\pm$ 0.014 &  0.662  $\pm$  0.005 &  1.204  $\pm$  0.008 \\  
\noalign{\smallskip}\hline\noalign{\smallskip}
SBS~0909$+$53      & 1    & 09 12:53.88   &  $+$~53 03 05.6   & 14.430  $\pm$  0.013 &  0.708  $\pm$  0.010 &  0.371  $\pm$  0.016 &  0.743  $\pm$  0.017 \\
		   & 2    & 09 12:48.96   &  $+$~53 02 36.6   & 17.168  $\pm$  0.009 &  1.358  $\pm$  0.031 &  0.814  $\pm$  0.014 &  1.561  $\pm$  0.019 \\
\noalign{\smallskip}\hline\noalign{\smallskip}		   & 1    & 09 51 28.26   &  $+$~26 33 17.5   & 16.514  $\pm$  0.007 &  1.419  $\pm$  0.040 &  0.843  $\pm$  0.003 &  1.729  $\pm$  0.007 \\
		   & 2    & 09 51 21.40   &  $+$~26 34 37.1   & 17.559  $\pm$  0.029 &  1.289  $\pm$  0.066 &  0.885  $\pm$  0.033 &  1.649  $\pm$  0.037 \\
FBQ~0951$+$263     & 3    & 09 51 15.79   &  $+$~26 34 55.2   & 17.174  $\pm$  0.006 &  0.915  $\pm$  0.048 &  0.542  $\pm$  0.021 &  0.990  $\pm$  0.015 \\
		   & 4    & 09 51 14.28   &  $+$~26 35 46.7   & 18.064  $\pm$  0.062 &    $-$          &  1.050  $\pm$  0.054 &  2.395  $\pm$  0.056 \\
		   & 5    & 09 51 10.78   &  $+$~26 35 03.2   & 18.542  $\pm$  0.099 &    $-$          &  1.003  $\pm$  0.120 &  2.488  $\pm$  0.094 \\
\noalign{\smallskip}\hline
\noalign{\smallskip}		   & 1    & 10 12 20.69   &  $-$~03 04 07.9   & 16.789  $\pm$  0.004 &  0.846  $\pm$  0.008 &  0.503  $\pm$  0.005 &  0.900  $\pm$  0.005 \\
LBQS~1009$-$0252   & 2    & 10 12 23.98   &  $-$~03 05 31.7   & 16.652  $\pm$  0.003 &  0.910  $\pm$  0.005 &  0.537  $\pm$  0.006 &  0.943  $\pm$  0.010 \\
		   & 3    & 10 12 17.80   &  $-$~03 09 23.0   & 17.577  $\pm$  0.010 &  0.854  $\pm$  0.052 &  0.515  $\pm$  0.014 &  0.957  $\pm$  0.011 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
Q~1017$-$207       & 1    & 10 17 27.70   &  $-$~20 48 47.2   & 16.935  $\pm$  0.002 &  1.440  $\pm$  0.009 &  1.029  $\pm$  0.005 &  2.154  $\pm$  0.007 \\
		   & 2    & 10 17 15.51   &  $-$~20 46 55.3   & 16.064  $\pm$  0.001 &  0.543  $\pm$  0.004 &  0.366  $\pm$  0.005 &  0.695  $\pm$  0.005 \\
\noalign{\smallskip}\hline
\noalign{\smallskip}		   & 1    & 11 55 12.12   &  $+$~19 39 12.3   & 16.201  $\pm$  0.009 &  0.583  $\pm$  0.009 &  0.336  $\pm$  0.009 &  0.641  $\pm$  0.011 \\
B~1152$+$200       & 2    & 11 55 17.65   &  $+$~19 39 32.9   & 16.059  $\pm$  0.044 &  0.731  $\pm$  0.087 &  0.414  $\pm$  0.051 &  0.973  $\pm$  0.043 \\
		   & 3    & 11 55 19.63   &  $+$~19 43 31.4   & 16.585  $\pm$  0.006 &  0.727  $\pm$  0.028 &  0.432  $\pm$  0.009 &  0.861  $\pm$  0.015 \\
\noalign{\smallskip}\hline
\noalign{\smallskip}		   & 1    & 14 24 29.84   &  $+$~22 56 40.6   & 14.190  $\pm$  0.018 &  0.683  $\pm$  0.016 &  0.401  $\pm$  0.005 &  0.784  $\pm$  0.005 \\
B~1422$+$231       & 2    & 14 24 30.08   &  $+$~22 58 05.1   & 15.356  $\pm$  0.022 &  0.861  $\pm$  0.016 &  0.478  $\pm$  0.007 &  0.930  $\pm$  0.004 \\
		   & 3    & 14 24 36.09   &  $+$~22 56 55.3   & 15.332  $\pm$  0.014 &  0.637  $\pm$  0.015 &  0.374  $\pm$  0.006 &  0.732  $\pm$  0.005 \\
		   & 4    & 14 24 34.01   &  $+$~22 56 02.5   & 16.499  $\pm$  0.014 &  0.741  $\pm$  0.020 &  0.416  $\pm$  0.009 &  0.819  $\pm$  0.023 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
SBS~1520$+$530     & 1    & 15 21 31.98   &  $+$~52 56 17.1   & 16.202  $\pm$  0.007 &  0.893  $\pm$  0.019 &  0.512  $\pm$  0.006 &  0.939  $\pm$  0.009 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
		   & 1    & 16 33 48.78   &  $+$~31 36 50.7   & 15.848  $\pm$  0.007 &  1.306  $\pm$ 0.017 &  0.835  $\pm$  0.003 &  1.527  $\pm$  0.005 \\
FBQ~1633$+$3134    & 2    & 16 33 53.21   &  $+$~31 37 38.1   & 17.582  $\pm$  0.018 &  0.932  $\pm$ 0.050 &  0.528  $\pm$  0.013 &  1.007  $\pm$  0.021 \\
\noalign{\smallskip}		  
\hline
\noalign{\smallskip}		   & 4    & 18 38 31.34   &  $-$~34 27 46.3   & 19.551  $\pm$  0.052 &  $-$                  & 0.614  $\pm$  0.054 &  1.017 $\pm$  0.054 \\
PMNJ~1838$-$3427   & 5    & 18 38 30.62   &  $-$~34 27 03.6   & 18.915  $\pm$  0.051 &  $-$                  & 0.641  $\pm$  0.054 &  1.073 $\pm$  0.052 \\
		   & 6    & 18 38 30.50   &  $-$~34 27 28.3   & 19.271  $\pm$  0.050 &  $-$                  & 0.573  $\pm$  0.053 &  0.969 $\pm$  0.052 \\
		   & 8    & 18 38 27.59   &  $-$~34 27 35.7   & 18.686  $\pm$  0.053 &  $-$                  & 0.505  $\pm$  0.058 &  0.841 $\pm$  0.053 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
		   & 1    & 21 52 16.65   &  $-$~27 32 45.9   & 14.972  $\pm$  0.010 &  0.562  $\pm$  0.010 &  0.337  $\pm$  0.005 &  0.639  $\pm$  0.014 \\
HE~2149$-$2745     & 2    & 21 52 22.07   &  $-$~27 32 58.7   & 16.149  $\pm$  0.010 &  0.671  $\pm$  0.012 &  0.389  $\pm$  0.007 &  0.712  $\pm$  0.009 \\
		   & 3    & 21 52 10.96   &  $-$~27 29 33.8   & 15.524  $\pm$  0.002 &  0.779  $\pm$  0.004 &  0.493  $\pm$  0.001 & 
		   0.938  $\pm$  0.007 \\
\hline
\end{tabular}}
\smallskip
Note. Units of right ascension are hours, minutes and seconds, and units of
declination are degrees, arcminutes, and arcseconds.
\end{table}


\begin{table}%T3
\caption{\label{colors-gls}Photometry for ten gravitational lenses 
(integrated flux measured by aperture photometry). 
The magnitudes presented are
the mean values over the epochs listed in Col.~8 of Table~\ref{info}.
The photometric errors were calculated in the same way as for the standards
in Table~\ref{colors-sfs}.} 
\centering
\par
\begin{tabular}{lcccc}
\hline
\hline\noalign{\smallskip}
Object  & 
$V$     & 
$B-V$   & 
$V-R$   & 
$V-I$  \\ 
\noalign{\smallskip}\hline\noalign{\smallskip}
UM~673           &  16.620  $\pm$  0.009 &  0.248  $\pm$  0.015 &  0.262  $\pm$  0.004 &  0.554  $\pm$  0.007 \\
APM~08279$+$52   &  16.519  $\pm$  0.010 &  1.997  $\pm$  0.037 &  1.177  $\pm$  0.015 &  1.909 $\pm$  0.016\\
SBS~0909$+$53    &  16.519  $\pm$  0.013 &  0.573  $\pm$  0.020 &  0.584  $\pm$  0.010 &  0.963  $\pm$  0.023 \\
FBQ~0951$+$263   &  17.049  $\pm$  0.008 &  0.311  $\pm$  0.051 &  0.359  $\pm$  0.011 &  0.601  $\pm$  0.004 \\
Q~1017$-$207     &  17.139  $\pm$  0.008 &  0.175  $\pm$  0.025 &  0.223  $\pm$  0.009 &  0.592  $\pm$  0.008 \\
B~1152$+$200     &  15.998  $\pm$  0.028 &  0.870  $\pm$  0.037 &  0.369  $\pm$  0.035 &  0.910  $\pm$  0.028 \\
B~1422$+$231     &  15.616  $\pm$  0.014 &  1.522  $\pm$  0.031 &  0.418  $\pm$  0.014 &  0.690  $\pm$  0.021 \\
FBQ~1633$+$3134  &  17.140  $\pm$  0.011 &  0.199  $\pm$  0.016 &  0.296  $\pm$  0.027 &  0.630  $\pm$  0.028 \\
PMNJ~1838$-$3427 &  19.839  $\pm$  0.046 &  $-$                 &  0.545  $\pm$  0.051 &  0.959  $\pm$  0.045 \\
HE~2149$-$2745   &  16.701  $\pm$  0.002 &  0.314  $\pm$  0.003 &  0.238  $\pm$  0.003 &  0.540  $\pm$  0.007 \\
\hline
\end{tabular}
\end{table}

\end{document}
