Conclusions
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1.
During the period 1978–1981, the decrease in the light of V 1057 Cyg continued, moreover somewhat more rapidly in 1979–1981 than in 1976–1979.
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2.
In the bands B and V the decrease in the light has a wavelike nature with an amplitude of about 0m.05 and a characteristic time of more than 200 days.
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3.
In U and in the line Hα irregular variability with a characteristic time of the order of a day is observed.
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4.
The equivalent width of the line Hα increased in parallel with the decrease in the continuum.
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5.
On October 7, 1978 a flare was observed in the line Hα.
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Additional information
Byurakan Astrophysical Observatory. Translated from Astrofizika, Vol. 19, No. 3, pp. 525–532, July–September, 1983, 1983.
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Oskanyan, A.V. Results of photoelectric observations of V 1057 Cyg. Astrophysics 19, 296–300 (1983). https://doi.org/10.1007/BF01007345
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DOI: https://doi.org/10.1007/BF01007345