COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2565 Konkoly Observatory Budapest 30 July 1984 HU ISSN 0374-0676 NEW NON-STABLE STARS IN ORION Continuing photographic survey with the help of the wide-field 70/100/210-cm Meniscus-type telescope of the Abastumani Astrophysical Observatory in 1982-1984 8 new flare stars (Table I) and 9 repeated flares (Table II) Table I No RA(1900) D(1900) m(pg) Delta m(pg) Date 132 5h30m30s -4d15'9 17m4 1m5 17.11.1979 133 5 31 17 -6 14.2 16.3 1.1 26.10.1981 134 5 27 49 -3 47.0 17.3 1.8 11.12.1982 135 5 22 46 -4 10.3 18.7 2.4 18.12.1982 136 5 30 19 -5 34.8 15.9 1.0 19.01.1983 137 5 36 13 -5 45.3 17.5 1.0 02.02.1983 138 5 29 51 -4 27.1 18.2 2.2 08.02.1983 139 5 30 50 -4 30.0 16.9 0.8 09.02.1983 140 5 30 26 -4 21.1 16.8 1.1 09.02.1983 141 5 33 18 -6 45.2 20.1 4.2 11.02.1983 Table II No RA(1900) D(1900) m(pg) Delta m(pg) Date Ident. 1 5h26m27s -4d41.5 16m7 4m3 12.12.1982 A 59 2 5 33 03 -6 28.2 14.6 1.2 12.12.1982 B 22 3 5 28 15 -5 03.3 17.7 1.1 17.12.1982 T 13 4 5 28 17 -4 55.8 17.2 1.3 24.12.1982 Ab 43 5 5 29 06 -6 40.3 18.2 2.7 03.02.1983 T 177 6 5 34 54 -6 28.1 16.5 1.2 09.02.1983 T 173 7 5 29 51 -5 01.7 18.0 1.4 09.02.1983 T 149 8 5 25 09 -4 27.6 17.4 1.0 11.02.1983 T 124 9 5 31 32 -7 19.8 19.3 4.1 20.03.1984 Ab 102 around Orion Trapezium have been found. In order to detect variable stars in the same field the whole accumulated material of 1978-1984 has been reexamined and 2 new flare stars and 28 variables (Table III), which have not been known as variables, were found. For these variables it is impossible to tell the type of variability, but according to their behaviour they all are probably RW Aurigae-type stars. They may not have shown variability for some time, and probably, they had not shown it at all, and entered into activity phase not long ago. This can be especially said in the case of star No. 24, which is [FIGURE 1] [FIGURE 2] Table III No RA(1900) D(1900) m(min) delta m Date 1 5h22m20 -5d21.5 17m8pg 2m3pg 12.12.1982, 11.10.1981 2 5 24 01 -3 38.7 16.0pg 3.5pg 02.02.1983, 20.03.1984 3 5 24 44 -6 34.1 18.0pg 1.4pg 11.10.1978, 28.01.1979 4 5 26 38 -6 13.1 17.2U 1.2U 25.02.1982, 29.01.1981 5 5 27 21 -5 39.3 17.4pg 0.9pg 11.12.1982, 28.10.1979 6 5 27 22 -6 25.2 17.1pg 1.2pg 27.11.1978, 02.02.1983 7 5 27 27 -3 47.5 16.4pg 1.1pg 18.12.1982, 08.02.1983 8 5 27 45 -7 38.7 17.5B 1.2B 14.12.1982, 12.12.1982 9 5 27 53 -6 02.3 18.3B 0.8B 14.12.1982, 12.12.1982 10 5 29 16 -4 54.1 18.4B 1.0B 29.01.1981, 14.12.1982 11 5 29 18 -5 59.4 17.6pg 1.3pg 26.11.1979, 12.02.1983 12 5 29 27 -6 58.4 18.0U 1.4U 25.02.1982, 29.01.1981 13 5 29 28 -4 28.0 17.5pg 0.7pg 26.10.1981, 04.10.1981 14 5 29 34 -5 45.6 16.7pg 1.1pg 26.11.1979, 23.12.1982 15 5 29 35 -6 20.2 17.1pg 0.7pg 11.10.1981, 25.02.1981 16 5 29 50 -6 02.1 18.3pg 1.0pg 11.10.1981, 27.09.1981 17 5 29 50 -5 37.6 18.4pg 2.1pg 20.03.1984, 11.10.1981 18 5 31 07 -6 19.9 15.4pg 0.9pg 27.09.1981, 11.10.1981 19 5 31 16 -5 46.2 17.9B 1.2B 14.12.1982, 29.01.1981 20 5 31 25 -5 18.4 18.5B 1.3B 29.01.1981, 14.12.1982 21 5 31 39 -6 12.1 16.3pg 0.9pg 22.10.1981, 18.12.1982 22 5 32 32 -5 37.6 17.4pg 1.0pg 10.10.1978, 06.03.1978 23 5 32 44 -5 12.2 17.3pg 0.8pg 08.02.1983, 23.02.1982 24 5 33 07 -4 20.2 18.5U 4.2U 18.12.1982, 06.02.1981 25 5 33 32 -4 06.1 17.7pg 1.6pg 28.10.1979, 23.12.1982 26 5 35 13 -6 32.6 16.5pg 0.8pg 26.11.1979, 18.12.1982 27 5 35 48 -6 34.3 16.6pg 1.5pg 08.02.1983, 19.01.1983 28 5 35 57 -5 33.6 16.1pg 1.1pg 24.10.1981, 25.02.1981 characterised by Fuor-like variability in smaller scale and at maximum it has a very strong H alpha emission. The identification charts of the new flare and variable stars are also given. We are continuing Abastumani (Ab) numbering (Natsvlishvili, 1982) for new flare stars, Stellar magnitudes have been determined on the plates, obtained either without filter (pg) by multiple exposure method or with UG2 (U) and GG13 (B) filters in combination with Kodak 103aO emulsion, In Table III the dates of maximum and minimum luminosity of the new variable stars are also given. R. Sh. NATSVLISHVILI Abastumani Observatory, Georgia, USSR Reference: Natsvlishvili, R.Sh., 1982, I.B.V.S. No. 2231