COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                        Number 995

                                        Konkoly Observatory
                                        Budapest
                                        1975 May 5


             PROPOSED GROUND-BASE OBSERVATIONS OF UV CETI
       FLARE STARS IN COORDINATION WITH THE MIT/SAS-C SATELLITE

        This notice is to alert ground-based observers (both optical and
radio) to the upcoming MIT/SAS-C satellite observations of UV Ceti
flare stars. The satellite is tentatively scheduled to observe flare
stars in the X-ray region of the spectrum during the period November 26 -
December 10, 1975. We plan to observe the flare stars, UV Ceti, YZ CMi
and AD Leo during this period and we are asking for the participation
of ground-based observers in this program.
        Any ground-based, optical observers, who would be interested in
cooperating in this program, should write to:

                        Dr. Thomas J. Moffett
                       Department of Astronomy
                  The University of Texas at Austin
                     Austin, Texas 78712 U.S.A.

After 1 August 1975, my address will be:

                        Department of Physics
                          Purdue University
                West Lafayette, Indiana 47907 U.S.A.

Radio observers should contact:

                        Dr. Carol Jo Crannell
                                 NASA
                    Goddard Space Flight Center
                              Code 682
                 Greenbelt, Maryland 20771 U.S.A.

We will Chen keep you posted, by means of status reports, regarding the
details of the program. Details of the observing schedule are not
currently available due to uncertainties in the satelllite's launch time
and achieved orbit etc.

The University of Texas at Austin
              and                                      THOMAS J. MOFFETT
McDonald Observatory