COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2424

                                    Konkoly Observatory
                                    Budapest
                                    1 November 1983

                                    HU ISSN 0374 - 0676


        PHOTOELECTRIC MINIMA TIMES OF BX ANDROMEDAE


  Photoelectric observations of the eclipsing binary BX And were carried
out during August and September 1982. The observations were made using a
two-beam, nebular-stellar photometer attached to the 48 inch Cassegrain 
reflector at the Kryonerion Station of the National Observatory of Athens. The
B and V filters used are in close accordance to the standard ones.
  The minima times have been calculated using Kwee and Van Woerden's method 
(1956) and are the mean values from B and V observations. The ephemeris
formulae used are:
  
   Min I (Hel.J.D.) = 2436528.7777 + 0.61011534d*E                    (I)
(GCVS, 1969.; SAK, 1982),
   Min I (Hel.J.D.) = 2443809.8873 + 0.61011508d*E                    (II)
(Castelaz, 1979).
  
  From our observations four minima times (two primaries and two secondaries) 
were found and are presented 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 (I) and (II), respectively and the type of minimum.

         T a b l e

Hel. JD      (O-C)_I   (O-C)_II  Min
2440000.+    days      days      Type
--------------------------------------
5213.4622   -0.0023   +0.0052    sec
5217.4266   -0.0037   -0.0013    pri
5218.3475   +0.0021   +0.0095    sec
5220.4784   -0.0024   +0.0050    pri
--------------------------------------

P. ROVITHIS            H. ROVITHIS-LIVANIOU
National Observatory   Astronomy Department
of Athens              Athens University
Athens 11851           Panepistimiopolis
Greece                 Athens (631)
                       Greece

References:
Castelaz, M.: 1979, IBVS, No. 1554.
Kwee, K.K. and Van Woerden, H.: 1956, Bull. Astron. Inst. Neth., 12, 327. [BIBCODE 1956BAN....12..327K ]