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\IBVShead{6128}{14 January 2015}

\IBVStitle{Minima Times of Some Eclipsing Binary Stars}

\IBVSauth{TERZ\.{I}O\u{G}LU, Z.; G\"{U}RSOYTRAK, H.; SARAL,G.; BA\u{G}IRAN, N.; G\"{O}KAY, G.; KILI\c{C}, Y.; DEM\.{I}RCAN, Y.; OKAN, A.; DO\u{G}RUEL, M.B.; ALPSOY, M.; CER\.{I}T, S.;  \c{S}EMUN\.{I}, M.; YILDIRIM, C.;  G\"{U}ROL, B.}

\IBVSinsto{Ankara University Observatory, Faculty of Science, Astronomy
and Space Sciences Department 06100, Tando\u{g}an, Ankara, T\"{U}RK\.{I}YE;
e-mail: zterzioglu@ankara.edu.tr}


We present several CCD minima observations of eclipsing binaries. Observations were done with an Apogee ALTA U47+ back illuminated CCD camera attached to an 16\arcs~Schmidt/Cassegrain 
telescope at Ankara University Observatory. Reduction of the CCD frames was made with the IRAF\footnotemark\,
\texttt{ccdred} and \texttt{daophot} packages. 

\footnotetext{IRAF is distributed by the National Optical Astronomical
Observatories, operated by the Association of the Universities for
Research in Astronomy, inc., under cooperative agreement with the
National Science Foundation}

The minima times were computed with several methods in Minima25b (Nelson 2006) (parabolic fit, tracing paper, bisectors of chords, Kwee and van Woerden method (Kwee \& van Woerden 1956), Fourier fit and sliding integrations technique). Then weighted mean minimum-time values were calculated for all filters used.


{\small
\begin{longtable}{llllclcl}
\caption{Times of minima of eclipsing binaries} \\
\hline
Variable & HJD 24..... & \multicolumn{1}{c}{$\pm$} & Obs & \multicolumn{1}{c}{$O-C$} & & Ref & Fil \\
\hline
 \endfirsthead
\multicolumn{8}{c}
{{\tablename\ \thetable{}: cont.}} \\
\hline
Variable & HJD 24..... & \multicolumn{1}{c}{$\pm$} & Obs & \multicolumn{1}{c}{$O-C$} & & Ref & Fil \\
\hline
\endhead
V1713 Aql           &     56132.5218    &   0.0002  &  AO-\c{S}\c{S}\c{S}-Y\c{S}  &  $-0.0034$  &  p  & \IBVSrefno{12}            & BVRI   \\ 
HH    Boo           &     56091.3859    &   0.0001  &  ZT                         &  $+0.0012$  &  p  & \IBVSrefno{2} (T$_0$), \IBVSrefno{11} (P)  & BVRI   \\ 
                    &     56092.3429    &   0.0006  &  HG-GG                      &  $+0.0022$  &  p  &               & BVRI   \\ 
                    &     56092.5024    &   0.0008  &  HG-GG                      &  $+0.0024$  &  s  &               & BVRI   \\ 
V1046 Cas           &     56161.4792    &   0.0020  &  MA                         &  $+0.0115$  &  s  & \IBVSrefno{6} (T$_0$), \IBVSrefno{11} (P)   & BVRI   \\ 
                    &     56189.4234    &   0.0003  &  MNB                        &  $+0.0114$  &  p  &               & BVRI   \\ 
EF    Cep           &     56156.4346    &   0.0007  &  MSH                        &  $+0.0010$  &  p  & \IBVSrefno{1} (T$_0$), \IBVSrefno{11}(P)  & BVRI   \\ 
                    &     56173.4064    &   0.0002  &  MBD                        &  $+0.0017$  &  p  &               & BVRI   \\ 
                    &     56194.3155    &   0.0003  &  MBD                        &  $+0.0001$  &  s  &               & BVRI   \\ 
EG    Cep           &     56197.4147    &   0.0002  &  GG-E\.{I}-BE               &  $+0.0116$  &  p  & \IBVSrefno{9} (T$_0$), \IBVSrefno{11} (P)   & BVRI   \\ 
ASAS J013630+0150.3   &     56196.5554    &   0.0005  &  HG                         &  $+0.0203$  &  s  & \IBVSrefno{13}            & BVRI   \\ 
TW    CrB           &     56090.4767    &   0.0002  &  AO-\c{S}\c{S}\c{S}-Y\c{S}  &  $-0.0004$  &  p  & \IBVSrefno{2} (T$_0$), \IBVSrefno{11} (P)  & BVRI   \\ 
V859  Cyg           &     56126.3023    &   0.0004  &  CY-MA                      &  $+0.0038$  &  p  & (a)           & BVRI   \\ 
                    &     56126.5052    &   0.0002  &  CY-MA                      &  $+0.0042$  &  s  &               & BVRI   \\ 
TYC 3069-1654-1      &     56094.4952    &   0.0004  &  \c{S}\c{S}\c{S}            &  $+0.0719$  &  s  & \IBVSrefno{4}             & BVRI   \\ 
                    &     56127.4039    &   0.0005  &  GG-E\.{I}-BE               &  $+0.0730$  &  p  &               & BVRI   \\ 
GSC 2750-0854        &     56174.5653    &   0.0004  &  AO                         &  $-0.1119$  &  p  & \IBVSrefno{7}             & BVRI   \\ 
                    &     56195.5498    &   0.0077  &  AO                         &  $-0.1160$  &  s  &               & BVRI   \\ 
TYC 2220-704-1       &     56169.3903    &   0.0003  &  GG                         &  $-0.0327$  &  p  & \IBVSrefno{13}            & BVRI   \\ 
                    &     56169.5509    &   0.0007  &  GG                         &  $-0.0320$  &  s  &               & BVRI   \\ 
                    &     56175.3059    &   0.0006  &  AY-YD                      &  $-0.0322$  &  s  &               & BVRI   \\ 
                    &     56175.4653    &   0.0004  &  AY-YD                      &  $-0.0326$  &  p  &               & BVRI   \\ 
ASAS J212915+1604.9   &     56134.3443    &   0.0003  &  GG-E\.{I}-BE               &  $+0.0005$  &  s  & (b)           & BVRI   \\ 
                    &     56134.4846    &   0.0003  &  GG-DD\.{I}-K\"{O}\"{U}     &  $-0.0007$  &  p  &               & BVRI   \\ 
                    &     56139.2950    &   0.0002  &  AO-Y\c{S}                  &  $-0.0007$  &  p  &               & BVRI   \\ 
                    &     56139.4378    &   0.0005  &  AO-Y\c{S}                  &  $+0.0006$  &  s  &               & BVRI   \\ 
                    &     56155.4242    &   0.0002  &  MA-BE-E\.{I}               &  $-0.0002$  &  p  &               & BVRI   \\ 
                    &     56155.5665    &   0.0002  &  MA-BE-E\.{I}               &  $+0.0006$  &  s  &               & BVRI   \\ 
ASAS J225956+1418.2   &     56196.4051    &   0.0005  &  HG                         &  $-0.0599$  &  p  & \IBVSrefno{13}            & BVRI   \\ 
V882  Per           &     56162.5056    &   0.0002  &  GG                         &  $+0.0145$  &  p  & \IBVSrefno{8}             & BVRI   \\ 
                    &     56171.5003    &   0.0005  &  MNB-MBD                    &  $+0.0155$  &  p  &               & BVRI   \\ 
                    &     56198.4814    &   0.0009  &  MNB                        &  $+0.0153$  &  p  &               & BVRI   \\ 
V384  Ser           &     56087.3527    &   0.0003  &  YK-SC                      &  $-0.0040$  &  p  & \IBVSrefno{3} (T$_0$), \IBVSrefno{11} (P)   & BVRI   \\ 
                    &     56087.4848    &   0.0008  &  YK-SC                      &  $-0.0062$  &  s  &               & BVRI   \\ 
GSC 2140-1485        &     56111.3167    &   0.0006  &  AO-Y\c{S}                  &  $-0.0025$  &  p  & (c)           & BVRI   \\ 
ASAS J205847+2731.9   &     56157.3047    &   0.0003  &  YK                         &  $+0.0076$  &  s  & \IBVSrefno{13}            & BVRI   \\ 
                    &     56157.4380    &   0.0005  &  YK                         &  $+0.0069$  &  p  &               & BVRI   \\ 
                    &     56157.5728    &   0.0007  &  YK                         &  $+0.0076$  &  s  &               & BVRI   \\ 
                    &     56166.4192    &   0.0003  &  MMK                        &  $+0.0077$  &  s  &               & BVRI   \\ 
                    &     56166.5521    &   0.0002  &  MMK                        &  $+0.0066$  &  p  &               & BVRI   \\ 
                    &     56195.2359    &   0.0003  &  AO                         &  $+0.0069$  &  p  &               & BVRI   \\ 
                    &     56195.3702    &   0.0005  &  AO                         &  $+0.0071$  &  s  &               & BVRI   \\ 
ASAS J211538+2454.2   &     56138.3995    &   0.0003  &  MA-MBD                     &  $-0.0221$  &  p  & \IBVSrefno{13}            & BVRI   \\ 
\hline
\multicolumn{8}{l}{(a): New elements: T$_0$=2451041.4457, P=0.4050062 d.}  \\
\multicolumn{8}{l}{(b): New elements: T$_0$=2455407.5576, P=0.28296136 d.}\\
\multicolumn{8}{l}{(c): New elements: T$_0$=2456111.3192, P=0.30120202 d.} \\
\end{longtable}
}


{\bf Observers:}

\begin{tabular}{lllll}
\\ 
AO:          & Abdullah OKAN                &~  &   MBD:             & Mustafa Burak DO\u{G}RUEL            \\
AY:          & Arzu YOLKOLU                 &~  &   MHT:             & Mustafa Hayri T\"{U}RKYILMAZ         \\
BE:          & Ba\c{s}ak ESMER              &~  &   MMK:             & Metehan Metin KEKL\.{I}K             \\
CY:          & Ceren YILDIRIM               &~  &   MNB:             & Mehmet Naim BA\u{G}IRAN              \\
DD\.{I}:     & Didem Dilan \.{I}ZC\.{I}     &~  &   MSH:             & Muhammed \c{S}EMUN\.{I}              \\
E\.{I}:      & Elif \.{I}MDAT               &~  &   SC:              & Sonay CER\.{I}T                      \\
GG:          & G\"{o}khan G\"{O}KAY         &~  &   \c{S}\c{S}\c{S}: & \c{S}akir \c{S}enol \c{S}AH\.{I}N    \\
GS:          & G\"{o}zde SARAL              &~  &   YD:              & Yahya DEM\.{I}RCAN                   \\
HG:          & Hande G\"{U}RSOYTRAK         &~  &   YK:              & Y\"{u}cel KILI\c{C}                  \\
HS:          & Hatice SARA\c{C}             &~  &   Y\c{S}:          & Yunus \c{S}ENDA\u{G}                 \\
K\"{O}\"{U}: & K\"{u}bra \"{O}zge \"{U}NAL  &~  &   ZT:              & Zahide TERZ\.{I}O\u{G}LU             \\
MA:          & Mehmet ALPSOY                &~  &                    &                                      \\

\end{tabular}


\references

Diethelm, R., 2012a, {\it IBVS}, No.\ 6011 \IBVSrefno{1}

Diethelm, R., 2012b, {\it IBVS}, No.\ 6029 \IBVSrefno{2}

H\"ubscher, J.\ et al., 2012, {\it IBVS}, No.\ 6026 \IBVSrefno{3} 

Khruslov, A.\ V., 2007, {\it Perem.\ Zvezdy Prilozh.}, {\bf 7}, 6 \IBVSrefno{4}

Kwee, K. K., van Woerden, H., 1956, {\it Bull. Astron. Inst. Neth.}, {\bf 12}, 327 \IBVSrefno{5}  

Locher, K., 2005, {\it OEJV}, {\bf 3}, 1 \IBVSrefno{6}

Maciejewski, G.\ et al., 2004, IBVS, No.\ 5518 \IBVSrefno{7}

Nagai, K., 2009, VSOLJ 48 \IBVSrefno{8}

Nagai, K., 2012, VSOLJ 53 \IBVSrefno{9}

Nelson, B., 2006, \texttt{http://www.members.shaw.ca/bob.nelson/software1.htm} \IBVSrefno{10}   

Paschke, A., Brat, L., 2006, {\it OEJV}, {\bf 23}, 13, \texttt{http://var.astro.cz/ocgate} \IBVSrefno{11}

Paschke, A., 2012, {\it OEJV}, {\bf 142}, 1 \IBVSrefno{12}

Pojmanski, G., 1997, {\it Acta Astronomica}, {\bf 47}, 467 \IBVSrefno{13}

\endreferences

\end{document}

