\documentstyle[twoside, epsf]{article}
\input ibvs2.sty
\input ibvse.sty

\begin{document}

\IBVShead{6094}{17 February 2014}

\IBVStitletl{Minima of eclipsing binary stars}


\IBVSauth{\noindent Corfini,~G.$^{1}$; Aceti,~P.$^{1}$; Arena,~C.$^{1,2,3}$; Banfi,~M.$^{1}$; Barbieri,~L.$^{1,4}$; Bianciardi,~G.$^{1,5}$; Bonaventura,~G.$^{1,2}$; Cervoni,~M.$^{1,6}$; Fossey,~S.$^{3}$; Lopresti,~C.$^{1,7}$; Marchini,~A.$^{1,8}$; \newline Marino,~G.$^{1,2}$; Martinengo,~M.$^{1}$; Papini,~R.$^{1}$; Ruocco,~N.$^{1,9}$; Salvaggio,~F.$^{1,2}$; \newline Zambelli,~R.$^{1}$}

\IBVSinst{Sezione Stelle Variabili -- Unione Astrofili Italiani (UAI), e-mail: {\tt stellevariabili@uai.it}}
\IBVSinst{Gruppo Astrofili Catanesi - Catania, Italy}
\IBVSinst{University of London Observatory, UCL - London, UK} %Arena, Fossey
\IBVSinst{Associazione Astrofili Bolognesi - Bologna, Italy} %Barbieri
\IBVSinst{Telescopio remoto UAI/Skylive/University of Siena - Italy} %Bianciardi
\IBVSinst{Associazione Tuscolana di Astronomia - Roma - Italy} %Cervoni
\IBVSinst{Istituto Spezzino Ricerche Astronomiche - La Spezia, Italy} %Lopresti
\IBVSinst{University of Siena Astronomical Observatory - Siena, Italy} %Marchini
\IBVSinst{Astrocampania, Sez. Stabia -- Penisola Sorrentina,  - Italy}  %Ruocco


\IBVStyp{  Binaries: eclipsing  }
\IBVSkey{CCD photometry, eclipsing binaries, times of minima}
\IBVSabs{We present several CCD minima observations of eclipsing binaries.}


\begintext

The list below contains 98 times of minima for 59 eclipsing binary stars calculated from CCD observations made by participants in the SSV-UAI Eclipsing Binaries Program. Except for two (Univ. College London Obs. and Univ. Siena Obs.) all the observatories are privately operated. Some light curves were remotely obtained (via Internet) using the UAI Remote Telescope, that is publicly available on the web site {\tt www.skylive.it}.\\
The observations were reduced following standard procedures (see next section) and the light curves were analyzed using the Kwee$-$van~Woerden algorithm (Kwee \& van Woerden, 1956) to determine the times of minima. All the times of minima listed in this paper are heliocentric.\\
It is worth noting that most of the observed stars are neglected objects.


\IBVSEobs{
36-cm Schmidt--Cassegrain (SC36)\\
30-cm Schmidt--Cassegrain (SC30)\\
25-cm Schmidt--Cassegrain (SC25) \\
25-cm Newton (N25) \\
23-cm Schmidt--Cassegrain (SC23)\\
20-cm Schmidt--Cassegrain (SC20) \\
20-cm Newton (N20) \\
13-cm Maksutov--Cassegrain (MC13)
} 



\IBVSEdet{
Meade DSI Pro II Monochromatic CCD camera (DSI) \\
& QSI 516wsg CCD camera (QSI) \\
& SBIG ST-7 CCD camera (ST7) \\
& SBIG ST-8XME CCD camera (ST8) \\
& SBIG ST-9 CCD camera (ST9) \\
& SBIG STL-6303 CCD camera (STL) \\
& Sony ICX429ALL based CCD camera (UAI) \\
& Canon Eos 1100D DSLR (Eos)
}

\IBVSEred{Frame calibration (dark subtraction and flat field correction) and photometric analysis (differential photometry on each image) were performed using MaxIm~DL or Mira~Pro software packages.}

\IBVSEmethod{Times of minima, expressed as Heliocentric Julian Day (see the attached Table), were computed adopting the KW method (Kwee \& van Woerden, 1956) using AVE (Barber\'a, 1996). This algorithm also provides an error estimate, that is the formal internal error of the KW method, which can be considered as a lower limit of the actual uncertainty on times of minima. Together with that error we provide, as upper limit of the uncertainty, an alternative estimate error according to the Arlot's (modified) method (Arlot et al., 2009) by adopting the formula $\sigma_{ToM}~=~\frac {1}{\sqrt {2}}\frac {\sigma_{m}}{\Delta m}{\Delta t}$, where ${\sigma_{m}}$ is the average error in magnitude and $\Delta m $ is the magnitude drop during a time range $\Delta t$ delimiting the part of the light curve where the speed of decrease in magnitude is the highest.}
\smallskip

{\normalsize
\IBVSEmins{
% star             ToM           err_arlot  err_KW         type   filter/s    authors/telesc/CCD
  V473 And    &   56185.5181    &   0.0004$^a$   0.0001$^b$\hspace*{0.3cm}    &  I  &   c   &  Banfi/SC25/ST7\\
  V473 And    &   56186.3198    &   0.0007   0.0004    &         I  &  $V$  &  Corfini/N20/UAI\\
  V473 And    &   56553.3065    &   0.0010   0.0002    &        II  &   c   &  Cervoni/SC36/ST8\\
  V473 And    &   56644.4018    &   0.0015   0.0003    &        II  &  $V$  &  Barbieri/SC30/ST9\\
  V608 Aur    &   56280.3285    &   0.0001   0.0001    &         i  &   c   &  Ruocco/SC25/ST7\\
  V609 Aur    &   56280.3732    &   0.0003   0.0002    &         I  &   c   &  Ruocco/SC25/ST7\\
  V609 Aur    &   56280.6120    &   0.0015   0.0005    &        II  &   c   &  Ruocco/SC25/ST7\\
  V618 Aur    &   56290.3306    &   0.0006   0.0004    &         i  &   c   &  Ruocco/SC25/ST7\\
    AQ Boo    &   56474.3809    &   0.0004   0.0004    &        ii  &   c   &  Salvaggio/SC23/ST8\\
    IW Boo    &   56416.4280    &   0.0022   0.0005    &         I  &  $V$  &  Banfi/SC25/ST7\\
    IW Boo    &   56416.5582    &   0.0009   0.0003    &        II  &  $V$  &  Banfi/SC25/ST7\\
    LY Boo    &   56426.4597    &   0.0010   0.0007    &         i  &   c   &  Ruocco/SC25/ST7\\
    MT Boo    &   56433.3348    &   0.0013   0.0010    &        ii  &   c   &  Ruocco/SC25/ST7\\
    OQ Cam    &   56371.3541    &   0.0005   0.0001    &         i  &   c   &  Salvaggio/SC23/ST8\\
    GO Cnc    &   56348.3574    &   0.0011   0.0002    &         i  &  $V$  &  Marino/N25/ST7\\
    EX CVn    &   56395.4009    &   0.0012   0.0004    &        ii  &   c   &  Ruocco/SC25/ST7\\
    SU Cep    &   56633.2807    &   0.0002   0.0001    &         I  &  $R$  &  Marino et al./N25/ST7\\
    VW Cep    &   56451.4689    &   0.0033   0.0002    &         i  &   c   &  Bonaventura/MC13/Eos\\
  V737 Cep    &   56141.4078    &   0.0010   0.0006    &        ii  &  $V$  &  Aceti et al./SC20/ST8\\
UCAC4 737-078030    &   56633.2715    &   0.0036   0.0006    &         I  &  $R$  &  Marino/N25/ST7\\
UCAC4 737-078030    &   56637.3727    &   0.0067   0.0005    &        II  &  $R$  &  Marino/N25/ST7\\
UCAC4 737-078030    &   56639.3136    &   0.0076   0.0003    &         I  &  $R$  &  Marino/N25/ST7\\
UCAC4 737-078030    &   56644.2780    &   0.0060   0.0006    &        II  &  $R$  &  Marino/N25/ST7\\
    AS CrB    &   56446.3428    &   0.0004   0.0006    &         i  &   c   &  Ruocco/SC25/ST7\\
    LN Cyg    &   56521.3706    &   0.0004   0.0003    &         I  &   c   &  Ruocco/SC25/ST7\\
}
\newpage 


\IBVSEmins{
    PY Cyg    &   56498.4447    &   0.0027   0.0004\hspace*{0.5cm}    &         i  &   c   &  Ruocco/SC25/ST7\\
  V447 Cyg    &   56136.4345    &   0.0007   0.0002    &         i  &   c   &  Ruocco/SC25/ST7\\
  V456 Cyg    &   56153.3446    &   0.0004   0.0007    &        ii  &  $V$  &  Salvaggio/SC23/ST7\\
  V869 Cyg    &   56471.4078    &   0.0014   0.0004    &         i  &   c   &  Ruocco/SC25/ST7\\
  V884 Cyg    &   56455.3963    &   0.0006   0.0004    &        ii  &   c   &  Salvaggio/SC23/ST8\\
  V931 Cyg    &   56456.4112    &   0.0002   0.0001    &         i  &   c   &  Salvaggio/SC23/ST8\\
  V979 Cyg    &   56454.4075    &   0.0003   0.0003    &        ii  &   c   &  Salvaggio/SC23/ST8\\
 V1044 Cyg    &   56185.3528    &   0.0012   0.0006    &         i  &  $V$  &  Martinengo/SC20/QSI\\
 V1045 Cyg    &   56185.4878    &   0.0005   0.0005    &        ii  &  $V$  &  Martinengo/SC20/QSI\\
 V1187 Cyg    &   56138.3541    &   0.0010   0.0003    &         i  &   c   &  Corfini/N20/UAI\\
 V1187 Cyg    &   56523.3895    &   0.0017   0.0005    &        ii  &  $V$  &  Marino/N25/ST7\\
 V1191 Cyg    &   56523.3831    &   0.0009   0.0003    &        ii  &  $V$  &  Marino/N25/ST7\\
 V1457 Cyg    &   56137.4737    &   0.0004   0.0003    &         i  &   c   &  Ruocco/SC25/ST7\\
 V1665 Cyg    &   56189.3146    &   0.0013   0.0002    &         i  &   c   &  Ruocco/SC25/ST7\\
 V1870 Cyg    &   56508.5757    &   0.0014   0.0004    &        II  &   c   &  Ruocco/SC25/ST7\\
 V1870 Cyg    &   56509.3678    &   0.0010   0.0008    &        II  &   c   &  Ruocco/SC25/ST7\\
 V1870 Cyg    &   56512.5247    &   0.0015   0.0007    &        II  &   c   &  Ruocco/SC25/ST7\\
 V1870 Cyg    &   56516.4742    &   0.0023   0.0006    &        II  &   c   &  Ruocco/SC25/ST7\\
 V1870 Cyg    &   56518.4483    &   0.0002   0.0002    &         I  &   c   &  Ruocco/SC25/ST7\\
KIC 1061825   &   56451.5009    &   0.0004   0.0003    &        ii  &   c   &  Marino/N20/ST7\\
GSC 03089-01273    &   56129.5241    &   0.0002   0.0003    &        ii  &   c   &  Marino/N20/ST7\\
GSC 03089-01273    &   56129.5258    &   0.0013   0.0003    &        ii  &   c   &  Arena/N20/DSI\\
 V1072 Her    &   56522.4967    &   0.0005   0.0001    &         I  &  $V$  &  Cervoni/SC36/ST8\\
 V1072 Her    &   56533.3736    &   0.0025   0.0003    &        II  &  $V$  &  Cervoni/SC36/ST8\\
 V1092 Her    &   56461.4064    &   0.0005   0.0003    &         i  &  $V$  &  Marino/N25/ST7\\
 V1106 Her    &   56119.4252    &   0.0004   0.0002    &        ii  &   c   &  Corfini/N20/UAI\\
 V1106 Her    &   56124.3921    &   0.0004   0.0003    &         i  &   c   &  Corfini/N20/UAI\\
 V1106 Her    &   56126.4282    &   0.0014   0.0012    &         i  &   c   &  Banfi/SC25/ST7\\
 V1106 Her    &   56126.5551    &   0.0006   0.0002    &        ii  &   c   &  Banfi/SC25/ST7\\
 V1106 Her    &   56127.4476    &   0.0002   0.0002    &         i  &   c   &  Corfini/N20/UAI\\
 V1106 Her    &   56157.3617    &   0.0005   0.0003    &        ii  &   c   &  Corfini/N20/UAI\\
 V1106 Her    &   56180.4048    &   0.0005   0.0002    &         i  &   c   &  Banfi/SC25/ST7\\
 V1106 Her    &   56185.3682    &   0.0000   0.0001    &        ii  &  $V$  &  Corfini/N20/UAI\\
 V1106 Her    &   56191.3523    &   0.0010   0.0003    &         i  &  $V$  &  Corfini/N20/UAI\\
 V1106 Her    &   56203.3183    &   0.0005   0.0002    &         i  &   c   &  Corfini/N20/UAI\\
 V1106 Her    &   56224.3210    &   0.0001   0.0003    &        ii  &   c   &  Zambelli/RC40/STL\\
 V1106 Her    &   56459.4460    &   0.0005   0.0001    &         i  &   c   &  Marino/N25/ST7\\
 V1106 Her    &   56499.4151    &   0.0028   0.0003    &         i  &   c   &  Barbieri/SC30/ST9\\
 V1106 Her    &   56499.5518    &   0.0038   0.0005    &        ii  &   c   &  Barbieri/SC30/ST9\\
 V1106 Her    &   56516.3489    &   0.0009   0.0001    &        ii  &   c   &  Barbieri/SC30/ST9\\
 V1106 Her    &   56516.4762    &   0.0019   0.0003    &         i  &   c   &  Barbieri/SC30/ST9\\
 V1106 Her    &   56528.4420    &   0.0015   0.0007    &         i  &  $V$  &  Cervoni/SC36/ST8\\
 V1175 Her    &   56135.4275    &   0.0009   0.0002    &         I  &  $V$  &  Aceti et al./SC20/ST8\\
 V1175 Her    &   56158.3929    &   0.0006   0.0002    &        II  &   c   &  Corfini/N20/UAI\\
UCAC4 638-056476    &   56129.5617    &   0.0013   0.0003    &         i  &   c   &  Marino/N20/ST7\\
    VX Lac    &   56584.2572    &   0.0031   0.0011    &        ii  &   c   &  Ruocco/SC25/ST7\\
    VY Lac    &   56269.2665    &   0.0004   0.0001    &         i  &   c   &  Salvaggio/SC23/ST8\\
UCAC4 708-102815    &   56598.4890    &   0.0037   0.0010    &         i  &  $V$  &  Marino/N25/ST7\\
UCAC4 708-102876    &   56598.5124    &   0.0048   0.0013    &        ii  &  $V$  &  Marino/N25/ST7\\
UCAC4 708-102942    &   56598.4101    &   0.0059   0.0016    &         i  &  $V$  &  Marino/N25/ST7\\
    IW Lyr    &   56446.4314    &   0.0009   0.0007    &        II  &   c   &  Ruocco/SC25/ST7\\
    IW Lyr    &   56448.4215    &   0.0003   0.0001    &         I  &   c   &  Ruocco/SC25/ST7\\
    NS Lyr    &   56092.5440    &   0.0008   0.0005    &         i  &   c   &  Ruocco/SC25/ST7\\
}
\newpage 

\IBVSEmins{
    QQ Lyr\hspace*{1.5cm}    &   56184.4009    &   0.0054   0.0017\hspace*{0.5cm}    &        II  &   c   &  Banfi/SC25/ST7\\
    QQ Lyr    &   56550.3634    &   0.0048   0.0003    &         I  &   c   &  Cervoni/SC36/ST8\\
  V417 Lyr    &   56459.4393    &   0.0003   0.0003    &        ii  &   c   &  Ruocco/SC25/ST7\\
  V417 Lyr    &   56459.5887    &   0.0003   0.0005    &         i  &   c   &  Ruocco/SC25/ST7\\
  V431 Lyr    &   56450.4307    &   0.0018   0.0005    &        ii  &   c   &  Ruocco/SC25/ST7\\
  V556 Lyr    &   56452.4622    &   0.0079   0.0003    &         i  &   c   &  Bonaventura/MC13/Eos\\
  V556 Lyr    &   56593.3241    &   0.0242   0.0002    &        ii  &  $V$  &  Marino/N25/ST7\\
  V864 Mon    &   56354.3415    &   0.0004   0.0000    &        ii  &  $V$  &  Marino/N25/ST7\\
    KN Per    &   56293.2412    &   0.0011   0.0008    &        ii  &   c   &  Ruocco/SC25/ST7\\
  V880 Per    &   56274.2808    &   0.0009   0.0003    &         i  &   c   &  Ruocco/SC25/ST7\\
  V912 Per    &   56265.3465    &   0.0005   0.0003    &         i  &   c   &  Ruocco/SC25/ST7\\
    AH Tau    &   56322.4137    &   0.0006   0.0002    &         i  &   c   &  Salvaggio/SC23/ST8\\
    EQ Tau    &   56290.4697    &   0.0004   0.0001    &         i  &  $V$  &  Marino/N20/ST7\\
    IV Tau    &   56291.3029    &   0.0020   0.0004    &         i  &   c   &  Ruocco/SC25/ST7\\
  V423 Tau    &   56281.4846    &   0.0021   0.0009    &         i  &  $V$  &  Corfini/N20/UAI\\
  V423 Tau    &   56290.3501    &   0.0029   0.0002    &         i  &   c   &  Marino/N20/ST7\\
    ES UMa    &   56342.4839    &   0.0007   0.0002    &         i  &  $V$  &  Arena, Fossey/SC36/STL\\
    HW Vir    &   56417.3374    &   0.0003   0.0001    &        II  &  $V$  &  Banfi/SC25/ST7\\
    HW Vir    &   56417.3957    &   0.0001   0.0000    &         I  &  $V$  &  Banfi/SC25/ST7\\
    HW Vir    &   56417.4538    &   0.0004   0.0002    &        II  &  $V$  &  Banfi/SC25/ST7\\
}
}

\IBVSEremexp{
Error:\\
\hspace*{0.1cm} $^a$ Arlot's modified method, $^b$ as given by KW method \\
Type: \\
\hspace*{0.1cm} I [II] the deeper [shallower] minimum\\
\hspace*{0.1cm} i [ii] the type of minimum simply assumed at 0 [0.5] phase according to the ephemeris provided by Kreiner's (2004) web site or by B.R.N.O. -- {\it O$-$C Gateway} web site ({\tt http://var.astro.cz/ocgate}), because:\\
\hspace*{0.4cm} -- the two minima observed during one night had the same depth (for V1106~Her)\\
\hspace*{0.4cm} -- only one minimum was observed or\\
\hspace*{0.4cm} -- the minima were not covered enough to allow to deduce the relative depth. \\
Remark:\\
\hspace*{0.1cm} Observer[s]/Telescope/Detector
%\hspace*{0.1cm} 1 [2]  the type of minimum assumed at the phase 0 [other phase $\neq0.5$]
}


\references

Arlot, J.-E. et al., 2009, {\it A\&A}, {\bf 493}, 1171

Barber\'a, R., 1996, AVE home page, {\tt http://www.astrogea.org/soft/ave/introave.htm}

Kreiner, J. M., 2004, {\it AcA}, {\bf 54}, 207, {\tt http://www.as.up.krakow.pl/ephem}

Kwee, K. K., van Woerden, H., 1956, {\it Bull. Astr. Inst. Neth.}, {\bf 12}, 327, (No. 464)

\endreferences

\end{document}
