The minimum optical variability time scale of V1341 Cygni /Cygnus X-2/ measured with the 6-meter telescope

Details The minimum optical variability time scale of V1341 Cygni /Cygnus X-2/ measured with the 6-meter telescope The minimum optical variability time scale of V1341 Cygni /Cygnus X-2/ measured with the 6-meter telescope

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sval....5..271b&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 5, Oct. 1979, p. 508-513.) Soviet Astronomy Letters, vol. 5, Sept.-Oct. 1979, p. 271-27

Astronomy and Astrophysics

Astronomy

3

Binary Stars, Light Emission, Telescopes, Variability, X Ray Sources, Astronomical Photometry, Brightness, Companion Stars, Time Response, Ultraviolet Filters

Scientific paper

The X-ray source Cyg X-2 has been observed with the 6-m telescope in violet and ultraviolet filters. Sporadic variability has been detected on time scales of 10-100 sec, but on scales of 10 to the -6th sec to 1 sec variability was absent from all the observations. The cutoff in the optical variability time scale at tau(min) about 10-30 sec implies that the size of the region where the X-ray flux is converted into optical radiation is R about 10 to the 12th cm.

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