COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 2094

                                  Konkoly Observatory
                                  Budapest
                                  1982 March 1

                                  HU ISSN 0374-0676




     PHOTOELECTRIC MINIMA TIMES OF DO CASSIOPEIAE AND
                   BX ANDROMEDAE




  Photoelectric observations of the eclipsing variables DO Cas
and BX And were carried out during August 1980 and September
1981, respectively. The observations were carried out using a
two-beam, nebular-stellar photometer attached to the 48 inch
Cassegrain reflector at the Kryonerion Station of the National
Observatory of Athens.
  Reduction of the observations was made in the usual way and
the filters used are in close accordance to the standard ones.
The times of minima have been calculated by Kwee and Van
Woerden's method (1956) and are the mean values from B and V
observations.
  For DO Cas the following ephemeris formulae were used:
  Min I (Hel JD) - 2433926.45729 +0.68466595d.E         (I)
      (GCVS, 1976, SAK, 1978)

and
  Min I (Hel JD) - 2433926.4573 +0.6846661d.E           (II)
      (Cester et al. 1977)

while for BX And the:
  Min I (Hel JD) - 2436528.7777 +0.61011534d.E          (I)
      (GCVS, 1969, SAK, 1982)

and
  Min I (Hel JD) - 2443809.8873 +0.61011508d.E           (II)
      (Castelaz, 1979).

  From our observations three times (one secondary and two
primaries) were reduced for DO Cas and one primary for BX And,
they are represented in the following Table the successive
columns of which give: the Hel. J.D., the (O-C)_I and (O-C)_II
according to the two ephemeris formulae for each star, and the
type of minimum.


                  Table I
-------------------------------------------
    Hel J.D.        (O-C)_I   (O-C)_II  Min
    2444000.+       days      days      Type
-------------------------------------------
DO Cas  475.4466   -0.0013   -0.0036   II
        476.4732   -0.0017   -0.0040   I
        478.5239   -0.0050   -0.0073   I
BX And  868.4446   +0.0038   +0.0011   I
-------------------------------------------






P. ROVITHIS            H. ROVITHIS-LIVANIOU
National Observatory   of Athens Astronomy Dept. Athens University
Athens (306)           Panepistimiopolis, Athens (631)
Greece                 Greece





References:
Castelaz, M.: 1979, IBVS No. 1554.
Cester, B., Giuricin, G., Mardirossian, F. and Pucillo, M.:
     1977, Astron. Astrophys. Suppl. 30, 223. [BIBCODE 1977A&AS...30..223C ]
Kwee, K.K. and Van Woerden, H.: 1956, Bull. Astron. Inst.
    Neth. 12, 327. [BIBCODE 1956BAN....12..327K ]