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\input ibvs2.sty

\begin{document}
\IBVShead{4555}{13 February 1998}

\IBVStitletl{Photoelectric and CCD times of minima}{ of 19 eclipsing binary systems}

\IBVSauth{Imre Barna B\'IR\'O$^1$, Tam\'as BORKOVITS$^1$, Tibor HEGED\"US$^1$, Zsolt PARAGI$^2$}
\IBVSinst{Baja Astronomical Observatory  of B\'acs-Kiskun County,
Baja, Szegedi \'ut, P.O. Box 766, H--6500 Hungary E-mail: barna@electra.bajaobs.hu}
\IBVSinst{F\"OMI Satellite Geodetic Observatory,
Budapest, P.O. Box 546, H--1373 Hungary}

\IBVSabs{We present several photoelectric and unfiltered CCD minima}
\IBVSabs{observations of 19 eclipsing binaries. Most of them are}
\IBVSabs{apsidal motion stars (or at least candidate ones).}

\begintext

We present photoelectric and CCD photometric minima
observations of 19 eclipsing binary systems.
Most of them are stars with apsidal motion 
or at least eccentric binary systems, selected from the listing
of Heged\"us~(1988). 
Some minima observations (e.g. for UZ Leonis) are part of complete light curve coverages. 

One part of the photoelectric observations was carried out at Piszk\'estet\H o 
Mountain Station of the Konkoly Observatory of the 
Hungarian Academy of Sciences with a 20~in. f/15 Cassegrain telescope. 
The photometer used was equipped with an unrefrigerated
EMI9058QB photomultiplier tube and Schott UG2 (for U), BG12+GG13 (for B)
and GG11 (for V) filters. This system is referred to as Pi50 in Table~1.
The other part of the photoelectric measurements was made at Baja Astronomical
Observatory with a Starlight-I photometer, equipped with an unrefrigerated
EMI9924A multiplier tube and Schott filters UG1 (matching Johnson's U),
GG400+BG25 (matching B) and OG515 (matching V), mounted on the 20~in. f/8.4
Ritchey-Chr\'etien telescope (Ba50 in Table~1). 
The unfiltered CCD observations were carried out with an ST-5 (1995-96), and
an ST-7 (1997) camera installed on the 20~in. RC telescope mentioned above.

 The observations were made between 1995-1998. Reduction of the photoelectric
data was made by standard procedures. 
For the reduction of the CCD frames we used the IRAF package. 
All the minima times were computed using the parabolic fitting method. 

Table~1 presents the derived minima times. The content of the first two 
columns is self-explaining. The error in the last digit appears in the third
column. In the fourth column  the types of minima are
marked  (I for  primary, and II for  
secondary ones), while in the fifth column the number of individual data 
involved in the parabolic fit is given. The columns from sixth to eighth describe
the filters used, the first three letters of the observers' names and 
the codes of the instrumentation. The last column contains the comparisons 
 used, identified by their BD, GSC or HD numbers.

\vfill \eject

\vskip 1mm
\centerline{Table 1}
\begin{center}
\small
\begin{tabular}{ccccccccc}
\hline
\hline
 Star& Min. HJD& error & Min. & Points & Filter & Obs.'s & Instr. & Comp.  \\
   & +2400000  & $\pm$ & type & used &          & name &          &        \\
\hline
\hline
AS~Cam & 50519.5178 &2&II & 78 & - & Bor & Ba50 (ST7) & GSC 4347-0466 \\
%
RZ~Cas & 50247.5014 &8& I & 91 & - & Bor & Ba50 (ST5) & GSC 4317-1437 \\
       & 50815.2545 &1& I & 51 & V & Par+Bor & Pi50 & BD+67\deg215   \\
       & 50815.2541 &6& I & 48 & B & Par+Bor & Pi50 &                 \\
%
PV Cas & 50244.4443 &3&II &134 & - & Bor & Ba50 (ST5) & GSC 4010-1545 \\
       & 50279.4665 &1&II & 40 & V & Bir & Pi50 & BD+58\deg2555      \\  
       & 50279.4667 &4&II & 40 & B & Bir & Pi50 &                     \\
%            
VW Cep & 50171.4028 &3& I & 18 & V & Bor & Pi50 & BD+75\deg765  \\
       & 50171.4030 &4& I & 18 & B & Bor & Pi50 &         \\
       & 50171.402  &1& I & 19 & U & Bor & Pi50 &         \\
       & 50171.5410 &3&II & 27 & V & Bor & Pi50 &         \\
       & 50171.5418 &1&II & 27 & B & Bor & Pi50 &         \\
       & 50171.543  &1&II & 27 & U & Bor & Pi50 &         \\
%
XX Cep & 50297.445  &1& I & 71 & V & Bir & Pi50 & BD+63\deg2030  \\
       & 50297.446  &1& I & 68 & B & Bir & Pi50 &         \\
%
GK~Cep & 50210.451  &2& I &146 & - & Bir & Ba50 (ST5) & GSC 4465-1764 \\
       & 50225.4286 &5& I & 81 & - & Bir & Ba50 (ST5) &        \\
%
MR~Cyg & 50230.4597 &2& I &104 & - & Bor & Ba50 (ST5) & GSC 3609-1293 \\
%
V453~Cyg&50235.4809 &5& I &628 & - & Bir & Ba50 (ST5) & GSC 2683-3541 \\
%
V477~Cyg&50237.4445 &2& I &120 & - & Bir & Ba50 (ST5) & GSC 2674-0910 \\
%
V836~Cyg&49919.4008 &5& I & 34 & - & Par & Ba50 (ST5) & GSC 2715-0017 \\
%
V1136~Cyg&50270.4672&4& I & 83 & - & Bir & Ba50 (ST5) & GSC 2150-3445 \\
%         
AK~Her & 50275.4763 &3& I & 47 & V & Bor & Ba50 & BD+16\deg3123 \\
       & 50275.474  &1& I & 48 & B & Bor & Ba50 &        \\
       & 50310.4582 &5& I & 32 & V & Bor & Ba50 &         \\
       & 50310.4574 &2& I & 32 & B & Bor & Ba50 &         \\
       & 50508.574  &1& I &102 & - & Bor & Ba50 (ST7) & GSC 1536-0928 \\
       & 50512.5802 &2&II & 83 & - & Bor & Ba50 (ST7) &         \\
%
CC~Her & 49876.4996 &3& I & 38 & - & Par & Ba50 (ST5) & GSC 0946-1166 \\       
%
DI~Her & 50238.4879 &5&II &135 & - & Bir & Ba50 (ST5) & GSC 2109-1273 \\
%    
UV~Leo & 50499.4473 &4& I & 44 & V & Bor & Pi50 & BD+14\deg2277 \\
       & 50499.4471 &2& I & 44 & B & Bor & Pi50 &        \\
       & 50513.5375 &3&II & 33 & - & Bor & Ba50 (ST7) & GSC 0845-0136 \\  
%
UZ~Leo & 50507.445  &2& I & 18 & V & Heg & Pi50 & BD+14\deg2279 \\
       & 50509.606  &1&II & 27 & V & Heg & Pi50 & \\
       & 50509.607  &1&II & 26 & B & Heg & Pi50 & \\
       & 50510.5361 &9& I & 16 & V & Heg & Pi50 & \\
       & 50510.5386 &6& I & 16 & B & Heg & Pi50 & \\
       & 50512.3872 &1& I & 24 & V & Heg & Pi50 & \\
       & 50512.388  &1& I & 21 & B & Heg & Pi50 & \\
%
FT~Ori & 50494.3442 &5& I & 36 & V & Bor & Pi50 & BD+22\deg1250 \\
       & 50494.3446 &3& I & 36 & B & Bor & Pi50 &        \\
%
ST~Per & 50813.330  &1& I & 54 & V &Bor+Par& Pi50 & HD 18615 \\
       & 50813.3301 &6& I & 47 & B &Bor+Par& Pi50 &        \\
%            
U~Sge  & 50287.5178 &9& I & 79 & V & Bor & Ba50 & BD+19\deg3976 \\
       & 50287.5184 &7& I & 79 & B & Bor & Ba50 &      \\
%            
\hline
\hline
\end{tabular}
\end{center}
\large
%\vfill \eject
%\vskip .6cm
Remarks on some of the variables: \\
{\it XX~Cep:} This Algol-system is an apsidal motion candidate star (e.g. Heged\"us, 1988), but recently Borkovits and Heged\"us (1996) tried to
explain its period variation by light-time effect. The new times of minima
(see also Heged\"us et al. 1996) do not support their solution. \\
{\it AK~Her:} The new times of minima are also inconsistent with the light-time
solution of Borkovits and Heged\"us (1996). \\
{\it CC~Her:} This minimum time was already published in Heged\"us et al. (1996),
but there we missed the correction for Daylight Saving Time (DST), and the GSC number of the comparison
was also incorrect. These are the correct data.\\
{\it PV~Cas:} The initial comparison candidate star for PV~Cassiopeiae, 
GSC~4010-1432, showed variations of about 0.8 mag against the check star
GSC~4010-1545, and some other fainter stars in the CCD frame.\\
This work was partly supported by the Local Government of B\'acs-Kiskun County.

\references

Borkovits T., Heged\"us T., 1996, {A\&ApSS}, {\bf 120}, 63

Heged\"us T., 1988, {\it CDS Bull.}, {\bf 35}, 15 

Heged\"us T., B\'\i r\'o I. B., Borkovits T., Paragi Zs., 1996, {\it IBVS} No.\,4340


\endreferences

\eject

%[From IBVS 4653]

\IBVStitle{Errata}

In IBVS Nos.\,4555 and 4633 we presented CCD photometric minima
observations (together with photoelectric ones) of several eclipsing binary systems.
Due to an unfortunate programming bug most of the minimum times have
an error in the third decimal place of JD\@.
This erratum contains the corrected moments of minima. 
Table 1 shows the corrigenda to IBVS No.\,4555.
Table 2 should be used as a total replacement of the Table of IBVS No.\,4633.

\begin{center}
{\normalsize Table 1}
\vskip 2mm
\begin{tabular}{ll|ll}
\hline
Star& Min.\ HJD &Star & Min.\ HJD \\
    & +2400000  &     & +2400000 \\
\hline
AS Cam & 50519.5238 & V453 Cyg & 50235.4843 \\
PV Cas & 50244.4435 & V477 Cyg & 50237.4480 \\
GK Cep & 50210.453 & V1136 Cyg & 50270.4694 \\
       & 50225.4297 & DI Her & 50238.4929 \\
MR Cyg & 50230.4608 & UV Leo & 50513.5487 \\
\hline
\end{tabular}

\vfill

{\normalsize Table 2}
\vskip 2mm
\begin{tabular}{l@{\ \ }l@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }l}
\hline
Star& Min.\ HJD & error & Min. & Points & Filter & Obs.'s & Instr. & Comp. \\
    & +2400000  & $\pm$ & type & used   &        & name   &        & \\
\hline
  RT~And &  50964.5050 & 2&  I& 51& V & Bir & Ba50 & HD 218915\\
  AB~And &  50966.5525 & 3& II& 30& V & Bir & Ba50 & GSC 2763-0683 \\
         &  50984.4721 & 4& II&   & V & Bir & Ba50 & \\
         &  51016.5005 & 1&  I& 41& V & Bor & Ba50 & \\
  OO~Aql &  50950.486: & 1&  I& 19& V & Bor & Ba50 & HD 187146 \\
         &  50956.5658:& 2&  I& 61& V & Bir & Ba50 & \\
         &  50967.4659 & 1& II& 45& V & Bor & Ba50 & \\
   Y~Cam &  50872.4672 & 3&  I& 77& - & Bor & Ba50 & GSC 4527-1983 \\
  AS~Cam &  50900.351  & 1& II&163& V & Bor & Ba50 & GSC 4347-0466 \\
  RZ~Cas &  50871.4318 & 3&  I&414& - & Bor & Ba50 & GSC 4317-1578 \\
  TV~Cas &  51005.45:  & 1& II&190& V & Bir & Ba50 & GSC 3665-0026 \\
  PV~Cas &  51015.5244 & 5&  I& 55& V & Bir & Ba50 & GSC 4010-1432 \\
  VW~Cep &  50871.6279 & 5&  I&102& - & Bor & Ba50 & GSC 4585-2387 \\
         &  50900.5736 & 3&  I& 54& V & Bor & Ba50 & \\
         &  50941.3443 & 3& II& 51& V,B,R & Bor & Ba50 & \\
         &  50941.4859 & 3&  I& 61& V,B,R & Bor & Ba50 & \\
         &  50942.4573 & 5& II& 59& V,B,R & Bir & Ba50 & \\
         &  50942.5990 & 5&  I& 28& V,B,R & Bir & Ba50 & \\
  XX~Cep &  51018.517: & 6& II& 91& V & Bor & Ba50 & GSC 4288-0186 \\
  CQ~Cep &  50948.5431 & 6&  I&200& V & Bir & Ba50 & GSC 3991-1316 \\
  DL~Cyg &  51038.485  & 3&  I&170& V,R & Bor & Ba50 & GSC 3595-0816 \\
  MR~Cyg & 50962.4954 & 1& II& 87& V & Bir & Ba50 & GSC 3609-1220 \\
         & 51014.4830 & 5& II&124& V & Bir & Ba50 & \\
V477~Cyg &  50974.4054 & 2&  I& 53& V & Bor & Ba50 & GSC 2674-0910 \\
AK~Her &  50865.6038 & 2&  I& 53& V,B & Bir & Pi50 & BD+16\deg3123 \\
         &  50866.6601 & 1& II& 78& - & Bor & Ba50 & GSC 1536-0928 \\
         &  50884.5722 & 2&  I& 82& V & Bor & Ba50 & \\
         &  50903.5413 & 3&  I& 78& V & Bir & Ba50 & \\
         &  50971.4060 & 3&  I&266& R & Bor & Ba50 & \\
\hline
\end{tabular}

\eject

{\normalsize Table 2 (cont.)}
\vskip 2mm
\begin{tabular}{l@{\ \ }l@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }c@{\ \ }l}
\hline
Star& Min.\ HJD & error & Min. & Points & Filter & Obs.'s & Instr. & Comp. \\
    & +2400000  & $\pm$ & type & used   &        & name   &        & \\
\hline
  GU~Her &  50970.434  & 2&  I&215& - & Bor & Ba50 & GSC 2581-2418 \\
         &  50983.4675 & 3&  I&200& - & Bir & Ba50 & \\
         &  51033.421  & 4& II&   & - & Bir & Ba50 & \\
  HS~Her &  50945.4749 & 2&  I&283& V & Bir & Ba50 & GSC 2113-2242 \\
         &  50972.4946 & 3& II&343& V & Bir & Ba50 & \\
         &  50981.5011 & 3&  I&125& V & Bir & Ba50 & \\
  MM~Her &  50940.5670 & 5&  I&182& V & Bir & Ba50 & GSC 1565-2199 \\
  SW~Lac &  50961.518  & 1& II& 49& V & Bir & Ba50 & GSC 3215-0906 \\
         &  50986.5358 & 1& II& 54& V & Bir & Ba50 & \\
         &  51017.4831 & 1&  I& 35& V & Bor & Ba50 & \\
  UV~Leo &  50899.4051 & 1& II& 60& V & Bir & Ba50 & GSC 0845-0121 \\
  GP~Vul &  50946.4643 & 8& II& 65& V & Bir & Ba50 & GSC 2151-2731 \\
\hline
\end{tabular}
\end{center}

\smallskip

\hfill\hbox{T. Borkovits, I.B. B\'{\i}r\'o}


\end{document}

