Coordinated Observations of the Red Dwarf Flare Star EV Lac in 1993

Bibcode
1997Ap&SS.257..131A
Abranin, E. P.; Bazelyan, L. L.; Alekseev, I. Yu.; Gershberg, R. E.; Avgoloupis, S.; Seiradakis, J. H.; Mavridis, L. N.; Beskin, G. M.; Mitronova, S. N.; Panferova, I. P.; Kidger, M. R.
Bibliographical reference

Astrophysics and Space Science, v. 257, Issue 1, p. 131-148 (1997).

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0
1997
Journal
Astrophysics and Space Science
Number of authors
11
IAC number of authors
1
Citations
8
Refereed citations
8
Description
Results of cooperative observations of the flare star EV Lac in September 1993 are presented. One of the about 30 optical flares detected was powerful enough to permit a quantitative analysis of its intrinsic radiation with the colour-colour technique. Sinusoidal brightness variations due to spottedness of the stellar surface was found to have an amplitude Delta V = 0.^m 0.24. Behaviour of the K band stellar brightness during strong and weak U band flares are considered. The upper limits of very fast optical brightness variations were estimated during both a moderate flare and quiet state of the star. No decametric bursts were observed during the campaign that could be certainly attributed to flare activity.
Type
Refereed

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