COMMISSIONS 27 AND 42 OF THE IAU
             INFORMATION BULLETIN ON VARIABLE STARS
                         Number 3997

                                                  Konkoly Observatory
                                                  Budapest
                                                  23 February 1994

                                                  HU ISSN 0374 - 0676


              PHOTOMETRIC OBSERVATIONS OF VW CEPHEI

  VW Cep (SAO 9828, BD+75d0752, HD 197433) is a W UMa type eclipsing binary.
This system was discovered as a variable star by Schilt in 1926 (Vinko, 1989).
  The observations of VW Cep were made on the two nights 25/26 and 27/28 August
1992, with a 0.4m telescope type Nasmyth at N. Copernicus Observatory and Planetarium
in Brno, Czech Republic. The telescope was used with the standard U, B, V filters and
uncooled EMI 6256B photomultiplier. The integration time of one measurement was ten
seconds.
  The comparison and check stars are SAO 9911 (HD 200039) and SAO 9917 (HD 200251),
respectively. Photometric data for comparison star was taken from The Bright Star Catalogue 
(Hoffleit et al., 1982) (V=6.05, B-V=+0.93), and the U-B index was derived from
photometry of epsilon Draconis (V=3.82, B-V=+0.89, U-B=+0.52, (Iriarte et 
al., 1965)) as
+0.66 mag. The 105 points obtained in each colour are plotted in Figure 1. Figure 2
shows the 220 points of the color indices.
  The following ephemeris was used for computing of the O-C values because elements
in GCVS 1985 indicate very poor agreement with my observations. The analysis of these
data will be published in a future paper.

            JD_hel MinI = 2448862.5255d+0.27831460d * E

  The new times of minima were calculated using the Kwee - van Woerden's (1956)
method and are given in Table I.

                                 [FIGURE 1]

               Figure 1. The light curves of VW Cephei

                                 [FIGURE 2]

               Figure 2.  The U-B and B-V colour curves


             Table I
--------------------------------------
J.D. Hel              Filter  Type of
2400000+
--------------------------------------
   48860.4386+-0.0003   V     II
   48860.4378+-0.0003   B     II
   48860.4364+-0.0004   U     II
   48862.3862+-0.0004   V     II
   48862.3870+-0.0004   B     II
   48862.3868+-0.0010   U     II
   48862.5257+-0.0002   V     I
   48862.5256+-0.0002   B     I
   48862.5252+-0.0004   U     I
-----------------------------------

                          Martin NAVRATIL
                          Nicolas Copernicus Observatory
                          and Planetarium
                          616 00 Brno, Czech Republic


References:
Hoffleit, D., Warren, W. H., Jr., 1982, The Bright Star Catalogue, 5th Revised Edition,
   Yale University Observatory
Iriarte, B., Johnson, H. L., Mitchell, R. I., and Wisniewski, W., Five-Color Photometry
   of Bright Stars, Sky and Telescope, July, 1965 [BIBCODE 1965S&T....30...21I ]
Kwee, K. K., van Woerden, H., 1956, Bull. Astron. Inst. Neth., 12, No. 464 [BIBCODE 1956BAN....12..327K ]
Vinko, J., 1989, Inf. Bull. Var. Stars, No. 3291