COMMISSIONS 27 AND 42 OF THE IAU
              INFORMATION BULLETIN ON VARIABLE STARS
                           Number 4027

                                                Konkoly Observatory
                                                Budapest
                                                19 May 1994

                                                HU ISSN 0374 - 0676


           TIMES OF MINIMA FOR SOME ECLIPSING BINARIES



 Eighteen minima for seven eclipsing variables have been determined photoelectrically.
These stars were observed during several seasons. All observations were obtained with
the 30 cm Maksutov telescope of the Ankara University Observatory. Differential 
observations were secured by using an EMI 9789QB photomultiplier before 29 September 1991
and an SSP5A (with a Hamamatsu R1414 photomultiplier) photometer after that date.
The filters used are in close accordance with the standard UBV and reductions of the
observations have been performed in the usual way (Hardie, 1962).


	                    Table 1


System     Min       HJD         Std. Err.   Filters   Obs.
                     2440000+
HS Her     I         7387.33721  0.00111     U,B,V     Gr
HS Her     I         7657.51786  0.00094     U,B,V     My
BF Aur     I         7499.55257  0.00127     U,V       Gr
BF Aur     I         7561.29777  0.00354     U,B,V     My
BF Aur     II        7595.33127  0.00139     U,B,V     Kh
KR Cyg     I         7712.43253  0.00113     U,B,V     Sl
V346 Aql   I         7713.51051  0.00057     U,B,V     Or
LS Del     II        8472.43681  0.00317     B,V       Od
W UMa      I         9444.40554  0.00035     U,B,V     Tn
W UMa      I         9454.41302  0.00031     B,V       Sl
V456 Oph   I         7346.3411	 0.0006      B,V       Kh
V456 Oph   I         7347.3579	 0.0010      B,V       Kh
V456 Oph   I         7348.3730	 0.0011      B,V       My
V456 Oph   I         7349.3903	 0.0013      B,V       Kh
V456 Oph   I         7351.4211	 0.0004      B,V       Or
V456 Oph   II        7377.3338	 0.0009      B,V       S1
V456 Oph   II        7382.4136	 0.0010      B,V       Ak
V456 Oph   I         7732.4223	 0.0005      B,V       Kh

Observers: AK: A. Akalin; Gr: B. Gurol; Kh: G. Kahraman; My: Z. Muyesseroglu; Od:
S. Ozdemir; Or: F. F. Ozeren; Sl: O. Selam; Tn: M. Tanriver


 The times of minimum light and standard errors for each filter were calculated using
the method of Kwee and van Woerden (1956). The algorythm of this method was applied
to the computer by Muyesseroglu. The weighted averages for these values are given in
Table 1 together with their minimum types, filters and observers.


                         Zekeriya MUYESSEROGLU
                         Selim O. SELAM
                         Ankara University Observatory
                         Faculty of Science
                         TR 06100 Tandogan, Ankara,
                         Turkey



References:

Hardie, R., 1962, "Astr. Tech.: Stars and Stellar Systems", Vol. II, Univ. of Chicago
  Press, Chicago
Kwee, K. K. and van Woerden, H., 1956, BuIl. Astron. Neth., 12, 327 [BIBCODE 1956BAN....12..327K ]