COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                        NUMBER 670

                                          Konkoly Observatory
                                          Budapest
                                          1972 May 3


               NEW FLARE STARS IN ORION


In the course of a program on searching flares in Orion 22 flare stars were
discovered. Only 3 of them are listed in [1]. The observations were made on
Kodak OaO emulsion (without filter) with the 70 cm Meniscus-type telescope of
the Abastumani Astrophysical Observatory. 62 plates each with five successive
exposures of six minutes were obtained in the period 15 Nov. 1969 - 8 Jan.
1970.

The plates obtained have been measured by means of the photometer MF-6 using
NPS and Andrew's standards [2] for calibration curves.

Table 1 gives coordinates, pg magnitudes at minimum, pg amplitude and date of
the flares and Tonantzintla Catalogue number from [1]. If the star was
unvisible before the flare (because of its weakness), the magnitude in minimum
was measured on the plate obtained with 30 min exposure, or was estimated
on Palomar Atlas. These magnitudes are given in parentheses.

The majority of the discovered flare stars have a time of decline not longer
than 20-30 minutes exept of 2 stars (No 13 and 21 of Table 1), having a time of
decline of several hours.

The details of observations will be published later.



Abastumani Astrophysical Observatory,
Georgia, USSR.
April, 1972
                                       R.I. KILADZE

References:

1. Haro, G., 1969, Bol. Obs. Tonantzintla y Tacubaya, 32, 59. [BIBCODE 1969BOTT....5...59H ]
2. Andrews, A.D., 1970, Bol. Obs. Tonantzintla y Tacubaya, 34, 195. [BIBCODE 1970BOTT....5..195A ]

Table 1

No.           1900             Magn.   m_pg   Date          Ident,
        RA            D         pg

 1  5h 25m 16s    -7d 02.8'    17.7    1.2    5 Dec. 1969
 2     29  29     -4  49.2    (18.1)   2.3    5 Dec.
 3     28  52     -4  56.2     16.6    0.6    6 Dec.         200
 4     28  43     -5  57.0     15.6    0.9    8 Dec.
 5     27  08     -4  33.6     16.1    0.8    8 Dec.
 6     28  16     -5  03.7     17.0    1.1    1 Jan. 1970     15
 7     30  46     -7  12.9     16.7    1.3    1 Jan.
 8     26  30     -5  09.7     17.3    0.8    5 Jan.
 9     22  20     -4  16.9    (18.1)   1.2    5 Jan.
10     24  08     -5  44.3     16.8    0.8    5 Jan.
11     26  58     -4  27.2     17.9    3.3    5 Jan.
12     29  08     -5  01.4    (21.0)   5.3    5 Jan.
13     29  04     -5  29.0     15.3    1.6    5 Jan.
14     29  58     -6  30.8     17.9    0.9    6 Jan.          46
15     27  45     -4  02.2     17.0    1.0    6 Jan.
16     30  55     -6  33.0     17.1    2.5    6 Jan.
17     31  34     -6  30.2     16.9    0.7    6 Jan.
18     33  35     -7  03.3     18.0    1.8    6 Jan.
19     29  41     -4  21.8     17.9    1.8    6 Jan.
20     29  01     -6  21.9    (18.9)   3.4    7 Jan.
21     30  57     -6  44.9     17.7    3.2    7 Jan.
22     26  08     -4  08.9     16.8    0.7    7 Jan.