COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
	              NUMBER 833


        	                     Konkoly Observatory
                	             Budapest
                        	     1973 October 15



             A NEW FLARE STAR NEAR HZ HER


	While obtaining high-speed photometric observations of the
X-ray source HZ Her, a nearby field star was observed to flare.
The star is indicated by the arrow in Figure 1.
	The observations were obtained on the 91-cm reflector at
McDonald Observatory using the high-speed photometer described 
by Nather and Warner (1971). The observed flare is shown in
Figure 2 and was detected with an Amperex 56DVP, operated uncooled,
with no filter (white light).
	Preliminary colors, based on only one observation, were
provided by P.E. Boynton (1973) which show the star to be about
10th magnitude and having colors consistent with a K-dwarf. If
spectra of the star confirm its suspected K-type classification,
it will be one of the few early type (K) UV Ceti stars known.
	Its proximity to the X-ray source Her X-1= HZ Her may
allow simultaneous optical and X-ray monitoring to look for X-ray
emission produced by flare events, as predicted by Grindlay (1970).



University of Texas at Austin
Austin, Texas 78712

                            THOMAS J. MOFFETT
                            PAUL A. VANDEN BOUT

References:
Boynton, P.E. 1973, private communication.
Grindlay, J.E. 1970, Ap.J. 162, 187. [BIBCODE 1970ApJ...162..187G ]
Nather, R.E. and Warner, B. 1971, M.N.R.A.S. 152, 209. [BIBCODE 1971MNRAS.152..209N ]


                       [FIGURE 1]

Figure 1. Field centered on HZ Her (16h54m14s, +35d29.8' (1900)).
The flare star is indicated by the arrow.

                       [FIGURE 2]

Figure 2. Light curve od flare event observed on 02 July 1973 using
no filter. The origin of the time axis is UT 08 02 51.