COMMISSION 27 OF THE I.A.U.
               INFORMATION BULLETIN ON VARIABLE STARS
                            Number 1491

                                                      Konkoly Observatory
                                                      Budapest
                                                      1978 October 18

                    PHOTOMETRY OF HZ Her

Recent observations (Hutchings 1978) showed some changes
in spectrum of HZ Her. To check photometric behaviour of the
star UBVR observations were obtained occasionally during an
observing run with No. 4-16 inch telescope of Kitt Peak National
Observatory. The star was observed from August 20 until
August 27, 1978. The star B (Grandi et al. 1974) was comparison
star. The observations in instrumental system are plotted in
Fig. 1. The phases have been calculated using the X-ray eclipse
elements (Giacconi et al. 1973).
   The scatter of points is due to internal flickering and
faintness of the star for a small telescope. It is obvious,
however, there is no dramatic change in colours and amplitudes
of variations of brightness with respect to the earlier 
observations (see e.g. Grandi et al. 1974). The fragmentary data
prevent extension of the above statements into details of light
curve.
   The author would like to thank Dr. John Hutchings for
communicating results of his observations before publication
and Dr. Bohdan Paczynski for interest and encouragement during
this work.
   The research was supported by NSF/Curie-Sklodowska Foundation 
under grant INT-76-80588.


                 ALEKSANDER CZERNY-SCHWARZENBERG

                    Astronomical Observatory
                     of Warsaw University
                    Warszawa, Ujazdowskie 4,
                       Poland, 00-478



References:

Giacconi, R., Gursky, H., Kellog, E., Levinson, R., Schreier, E.,
       and Tananbaum, H. 1973, ApJ 184, 227 [BIBCODE 1973ApJ...184..227G ]
Grandi, S., Hintzen, P., Jensen, E., Rydgren., A., Scott, J.,
       Stickney, P., Wheelan, J., and Worden, S. 1974, ApJ. 190, 365 [BIBCODE 1974ApJ...190..365G ]
Hutchings, J. 1978, IAU Circ. 3253 [BIBCODE 1978IAUC.3253....3C ]


                       [FIGURE 1]