COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 2873

                                         Konkoly Observatory
                                         Budapest
                                         3 March 1986

                                         HU ISSN 0374 - 0676



           PHOTOELECTRIC LIGHT CURVES OF RR LEPORIS




   The eclipsing binary system RR Lep (BD-13deg1086) was first discovered by
Hoffmeister (1931). Although there have been subsequent visual and
photographic reports, no photoelectric work has been done on the system. For
this reason, RR Lep was selected for observation on seven nights during
December, 1979. The number two 41cm telescope at Cerro Tololo Inter-American
Observatory was used with standard B, V filters and an RCA 1P21. The
comparison and check stars were BD-13deg1090 and BD-12deg1091, respectively.
Approximately 700 observations were obtained at each effective wavelength.
Two epochs of minimum light were determined from the observations made during
one primary and one secondary eclipse. These are shown in Table I.

                     TABLE I


      JD Hel
      2444200+       Minimum         (O-C)

      26.66347         I            +0.0000

      31.69675         II           -0.0015

    The times of minimum light in Table 1 along with 27 other epochs by
Erleksova (1953, 1966), Orion 122, 124 and 129 (1971, 1972) and BBSAG #6
(1973) were introduced with varying weights into a least squares solution to
obtain the ephemeris:

           JD Hel Min.I = 2444Z26.6634 + 0.91542787 E
                        +-          44 +-        42 p.e.

This was used to calculate the O-C's in Table I.

  The B and V light curves of RR Lep defined by the individual observations
are shown in Figure 1 as Delta m versus phase. The analysis of the observations is
underway.


                            [FIGURE 1]

 Fig. 1 - Light curve of RR Lep defined by the individual observations.



BEVERLY B. BOOKMYER
DANNY R. FAULKNER*
RONALD G. SAMEC
Dept. of Physics & Astronomy
Clemson University
Clemson, S.C. 29634-1911 USA

*
Dept. of Astronomy
Indiana University
Bloomington, IN 47405


References:
Erleksova, G. E. 1953, Peremennye Zvezdy 9, 152.
Erleksova, G. E. 1966, Bull. Astrophysics No. 41-42, Acad. Science Tadjik,
  p. 61.
Hoffmeister, C. 1931, Astr. Nach. 242, 129. [BIBCODE 1931AN....242..129H ]