COMMISSION 27 OF THE I. A. U.
      INFORMATION BULLETIN ON VARIABLE STARS
                  Number 1702

                                Konkoly Observatory
                                Budapest
                                1979 November 7


    MINIMA OF SOUTHERN ECLIPSING VARIABLES, 1975 - 1979 
                     SIDING SPRING


The programme of multiband photoelectric observation of neglected Southern
eclipsing variables was initiated by the author in 1975 with the 41 cm
reflecting telescope and UBV photometer (1P21) at Siding Spring Observatory,
New South Wales, Australia. Timing of minima has been the first task of
the programme. This paper contains several times of minima as a preliminary
result to make them available for further spectroscopic and photometric
observations. Several stars showed such a high shift of the time of
minimum with respect to the ephemeris (GCVS) that there is no doubt about
the variation of the period. The detailed results concerning period
variations will be published shortly.

Table I contains the times of primary and secondary minima in heliocentric
Julian days. The errors are of the same order as the last digit given in
the table but not larger than 0.002 day. The original observational data
for all stars will be published as the full reduction of data proceeds.
The same applies for the observation of stars with well known variability
of their periods observed at the same time span (GL Car, SV Cen, V 523 Sgr,
AO Vel). Requests for more detailed data before publication may be directed
to the author.

Since 1977 this programme has been supported by the grant of the Australian
Research Grant Commission.


Z. KVIZ
Broken Hill Division,
The University of N.S.W.

Table I

Star and Min.    T min (HJD)
                 2400000.+

V 646 Cen I      43916.1946
TV Nor   II      43337.1050
RW Cet   I       43459.121
RW CrA   I       43342.9212
RW CrA   II      43331.977
RS Sgr   I       42953.2052
RS Sgr   II      43336.097
ZZ Sgr   I       43344.9859
X  Car   I       42771.1012
X  Car   II      42777.0550
AS Vel   I       42781.070
Z  Nor   I       43343.9897
Z  Nor   II      43710.909
XZ Sgr   I       43335.1574
FV Sco   I       42954.0424
SX Sgr   I       44048.161
BP Mus   I       43928.138