COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2320

                                   Konkoly Observatory
                                   Budapest
                                   22 April 1983

                                   HU ISSN 0374 - 0676



        AAVSO DATA ON MIRA VARIABLES PUBLISHED


The American Association of Variable Star Observers (AAVSO)
publishes the observations received from its observers in the
form of AAVSO Reports. The AAVSO announces the publication of
AAVSO REPORT 38, containing over 150,000 observations from
September 9, 1974, to June 5, 1977, Julian Day 2442300 to
2443300, on 557 long period variables stars (Mira type). Data
on 450 stars are published in the form of computer-generated
light curves (each on a separate 8 1/2 x 11 inch page). Each
data point representing one observation is plotted with Julian
Date versus magnitude. Figure 1 is a sample light curve of
Chi Cyg (reduced for this publication). Dates of observed

                     [FIGURE 1]

maxima and minima of those stars with AAVSO mean curves are
indicated on the plots. These data are also tabulated. For
25 stars, listings of photoelectric data included in the plots
are given. For 107 stars, having too few data points to
warrant a plotted curve, individual observations are tabulated.
Information on all of the stars mentioned in AAVSO REPORT 38,
and the names and observing codes of contributing observers are
also tabulated. AAVSO REPORT 38 is now available from: AAVSO,
187 Concord Avenue, Cambridge, MA, USA, 02138, at a cost of
$30.00, USA delivery postpaid, or $32.50 (USA funds) for
delivery elsewhere postpaid.
AAVSO REPORT 39, covering other types of variable stars for the
same time period, will be published in mid-1983.


                    JANET A. MATTEI
                    American Association of
                    Variable Star Observers (AAVSO)
                    187 Concord Avenue
                    Cambridge, MA 02138
                    U.S.A.