COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2134

                                 Konkoly Observatory
                                 Budapest
                                 1982 April 28

                                 HU ISSN 0374-0676




        NEW H_alpha - EMISSION STARS IN THE REGION OF gamma CYGNI




  During the period 1977-1980 an H_alpha-survey in the region of gamma Cygni has
been made with the 40in/52in Schmidt-telescope: of Byurakan Astrophysical
Observatory.
  The spectral plates were obtained by a 4d objective prism; (275 A/mm at H_gamma)
on Kodak II F, 103 aF, and 103 aE emulsions through an RG 610 filter. The
exposure times were between 30s  and 70min and the limiting magnitude was
about 18.5m (pg) for the exposure time of 60 min.
  18 new H_alpha - emission stars have been found which were not included in
the complete lists of H_alpha - emission stars of Dolidze (1975) and in the list
of Coyne et al. (1976).
  The data of observed new H_alpha - emission stars are presented in Table I.


                    Table I
--------------------------------------------------------
Designation  R.A.(1950.0)  D.(1950.0)  B_p      I_H_alpha
--------------------------------------------------------
     1       20h12.2m        40d15'    18.4m       2
     2          14.3         42 54     19.9        3
     3          15.0         41 44     17.0        3
     4          15.8         41 42     13.4        3
     5          16.3         41 44     14.6        3
     6          17.0         41 57     17.8        3
     7          17.4         41 28     18.6        2
     8          19.6         41 44     18.5        2    
     9          20.8         39 50     18.2        2
    10          21,6         42 00     18.0        2
    11          22.0         43 18     19.3        2
    12          22.3         40 12     18.3        2
    13          22.6         41 50     18.4        2
    14          28.1         39 56     17.7        1
    15          28.4         40 07     17.8        2
    16          30.9         39 57     21:         1
    17          31.0         40 24     17.9        2
    18          31.7         41 25     16.7        2

   Column 1: Serial number of H_alpha - emission stars.
   Column 2 and 3: Coordinates for 1950.0.
   Column 4: Photographic magnitudes measured on the POSS blue prints
         (B_p ) according to the method of stellar diameters.
   Column 5: Intensity of H_alpha - line in emission: 5-very strong, 4-strong,
         3-medium, 2-weak and 1-very weak.





 The H_alpha - emission star No. 15 in this list is identical with the star
V 1391 Cygni discovered by Romano (1969).
 A more detailed study including the identification charts of the discovered 
H_alpha - emission stars will be published elsewhere.





           KATYA P. TSVETKOVA and M.K. TSVETKOV
           Department of Astronomy with
           National Astronomical Observatory,
           Bulgarian Academy of Sciences
           Sofia-1184, Lenin Str. 72
           Bulgaria





References:

Coyne, G. et al.: 1976, Vatican Obs. Publ., 1, No. 8.
Dolidze, M.V.: 1975, Bull.Abastum.Astroph.Observ., 47.
Romano, G.: 1969, Pubbl.Osser.Astronom.Padova, No. 156.