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A Search for Super-Rapid Variability of X-Ray Sources and Other Peculiar Objects

Published online by Cambridge University Press:  14 August 2015

O. A. Evseyev ,
V. N. Mansurov ,
V. S. Pavlova ,
L. A. Pustil'Nik ,
V. F. Shvartsman ,
G. S. Tsarevsky  and
A. K. Yakushev
O. A. Evseyev
Affiliation:
Special Astrophysical Observatory, Stavropolski Kray, U.S.S.R.
V. N. Mansurov
Affiliation:
Special Astrophysical Observatory, Stavropolski Kray, U.S.S.R.
V. S. Pavlova
Affiliation:
Special Astrophysical Observatory, Stavropolski Kray, U.S.S.R.
L. A. Pustil'Nik
Affiliation:
Special Astrophysical Observatory, Stavropolski Kray, U.S.S.R.
V. F. Shvartsman
Affiliation:
Special Astrophysical Observatory, Stavropolski Kray, U.S.S.R.
G. S. Tsarevsky
Affiliation:
Special Astrophysical Observatory, Stavropolski Kray, U.S.S.R.
A. K. Yakushev
Affiliation:
Special Astrophysical Observatory, Stavropolski Kray, U.S.S.R.

Abstract

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At the Special Astrophysical Observatory of the U.S.S.R., an experiment to detect super-rapid variability of brightness and polarization in a number of peculiar objects is being carried out. This includes the optical stars identified with X-ray sources, specifically Cyg X-1, Her X-1 and Sco X-1, as well as the so-called DC-dwarfs and some BL Lac-type objects (that is optical objects possessing a continuous spectrum). The time range of measurements varies for different objects; however as a rule, it lies within 10−5 to 10 s.

At the time of our observations no rapid and super-rapid fluctuations of radiation exceeding in amplitude 10% have been detected.

Type
Part 9 / Variable X-Ray Sources
Information
Symposium - International Astronomical Union , Volume 67: Variable Stars and Stellar Evolution , 1975 , pp. 477 - 480
Copyright
Copyright © Reidel 1975 

References

Shvartsman, V. F.: 1971, Astron. Zh. 48, 479 = Soviet Astron. 15, 377.Google Scholar
Shvartsman, V. F.: 1974, in DeWitt-Morette, C. (ed.), ‘Gravitational Radiation and Gravitational Collapse’, IAU Symp. 64, 183.Google Scholar