COMMISSION 27 OF THE I. A. U.
            INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1962

                                     Konkoly Observatory
                                     Budapest
                                     1981 May 5

                                     HU ISSN 0374-0676


      PHOTOELECTRIC MINIMA OF THE ECLIPSING VARIABLE VW CEPHEI


      The W UMa-type eclipsing variable VW Cephei was observed on
   July 7-10, 1980, at Kryonerion Observatory, Greece. Seven times of
   minima obtained during this season are listed in the following
   Table I. The observations were made with a 48-inch Cassegrain
   reflector (Contopoulos and Banos, 1976) and a two beam multimode 
   photometer (Goudis and Meaburn, 1973). The two intermediate
   pass-band filters used were selected to be in close accordance
   with the standard UBV colour system.
      All the times of minima and the mean errors sigma were calculated 
   by the method of Kwee and Van Woerden.
      The successive columns contain the heliocentric time of
   minimum, the mean error sigma, the difference O-C, the filter used
   and remarks. The following ephemeris, given by Hopp et al. (1979),
   was used for calculation of the O-C values.


         Min I = JD Hel 2443410.4180+0.27831481d E.
                     
                    Table I

	HJD      sigma    O-C     Filter    Rem.
2440000+
    4428.4934  +-0.0002	-0.0001    B,V      Min I
    4429.3281  +-0.0001	-0.0004    B,V      Min I
    4429.4673  +-0.0001	-0.0003    B,V      Min II
    4430.4412  +-0.0001	-0.0005    B,V      Min I
    4430.5805  +-0.0001	-0.0004    B,V      Min II
    4431.4160  +-0.0001	+0.0002    B,V      Min II
    4431.5553  +-0.0001	+0.0003    B,V      Min I


                         P.G. NIARCHOS
                         Department of Astronomy
                         University of Athens
                         Panepistimiopolis, Athens 621
                         Greece


References:
Contopoulos, G. and Banos, C.: 1976, Sky and Telescope, 51, 154. [BIBCODE 1976S&T....51..154C ]
Goudis, C. and Meaburn, J.: 1973, Astrophys. Space Sci., 20, 149. [BIBCODE 1973Ap&SS..20..149G ]
Hopp, U., Witzigmann, S. and Kiehl, M.: 1979, I.B.V.S. No 1599.