COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                   Number 1923

                                 Konkoly Observatory
                                 Budapest
                                 1981 February 11

                                 HU ISSN 0374-0676


  PHOTOELECTRIC MINIMA OF THE ECLIPSING BINARY PV CASSIOPEIAE


  The eclipsing binary PV Cas (BV 72; BD+58d2554) has been 
investigated by different authors (Geyer, 1961; Pohl, 1969; Ibanoglu, 
1971, 1974) during the past twenty years. It was also observed 
photoelectrically at the Konkoly Observatory and four primary
and seven secondary minima were obtained. BD+58d2562 was used as
comparison star.
  The observations were made in B and V colours with the
(*) 24" Newton telescope (in Budapest) equipped with an unrefrigerated 
EMI 9502 B photomultiplier and with the
(**) 20" Cassegrain telescope (in the mountain station) equipped
with an unrefrigerated EMI 9058 QB photomultiplier.

  The O-C values were calculated with the following elements
given by Ibanoglu (1974) :

    Min I = J.D.Hel. 2440227.4044 + 1.75046986d E
                      	   +-   3         +-16

              Table I Times of minima

	Min. (Hel.)        O-C          Type   Remark

     2442233.4400         -0.0016	 I      **
	2716.5735         +0.0005	 I      **
	2766.4270         +0.0006	 II     *
	2786.5905         -0.0005	 I      **
	2850.4495         +0.0006	 II     *
	3046.5050         +0.0022	 II     *
	3076.2635         +0.0025   	 II     *
	3125.2795         +0.0041	 II     *
	3348.4910         -0.0007	 I      *
	3482.3775         +0.0079 	 II     *
	3524,3860         +0.0038 	 II     *





                            J. KELEMEN
                         Konkoly Observatory
                          Budapest, Hungary


References:
Geyer, E.H.: Zeitschrift fur Astrophysik 51, 79 (1961) [BIBCODE 1961ZA.....51...79G ]
Pohl, E.: Inf. Bull. Var. Stars No. 386 (1969)
Ibanoglu, C.: Inf. Bull. Var. Stars No. 555 (1971)
Ibanoglu, C.: Astronomy and Astrophysics, 35, 483 (1974) [BIBCODE 1974A&A....35..483I ]