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X-ray intensity variations in BL Lac sources H2155-304 and PKS 0548-322

Published online by Cambridge University Press:  19 July 2016

P.C. Agrawal ,
K.P. Singh  and
G.R. Riegler
P.C. Agrawal
Affiliation:
Tata Institute of Fundamental Research Colaba, Bombay 40005, India
K.P. Singh
Affiliation:
Tata Institute of Fundamental Research Colaba, Bombay 40005, India
G.R. Riegler
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, USA

Abstract

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The X-ray Observations of two BL Lac Objects H2155-304 and PKS 0548-322 made with HRI and MPC on the Einstein Observatory show intensity variations on time scale of hours in both the sources. X-ray spectra of the two BL Lacs are derived. Limits on the mass of the accreting compact objects are obtained from time scale and magnitude of variations. Implications of the results are briefly discussed.

Type
II. Continuum Emission
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 273 - 274
Copyright
Copyright © Reidel 1986 

References

Agrawal, P.C. and Riegler, G.R. 1979, Ap. J. (Letters), 231, L25.Google Scholar
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Urry, C.M. 1984, (NASA Technical Memorandum 86103).Google Scholar
Mushotzky, R.F. et al. 1979, Ap. J. (Letters), 232, L17.Google Scholar
Worrall, D.M. et al. 1981, Ap. J., 243, 53.Google Scholar