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X-ray selected BL Lac objects: time variability and X-ray spectrum

Published online by Cambridge University Press:  19 July 2016

D. Maccagni ,
P. Barr ,
B. Garilli ,
I.M. Gioia ,
P. Giommi ,
T. Maccacaro  and
R. Schild
D. Maccagni
Affiliation:
Istituto di Fisica Cosmica, CNR, Milano, Italy
P. Barr
Affiliation:
EXOSAT Observatory, ESOC-ESA, Darmstadt, FRG
B. Garilli
Affiliation:
Istituto di Fisica Cosmica, CNR, Milano, Italy
I.M. Gioia
Affiliation:
Center for Astrophysics, Cambridge, Mass., U.S.A.
P. Giommi
Affiliation:
EXOSAT Observatory, ESOC-ESA, Darmstadt, FRG
T. Maccacaro
Affiliation:
Center for Astrophysics, Cambridge, Mass., U.S.A.
R. Schild
Affiliation:
Center for Astrophysics, Cambridge, Mass., U.S.A.

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The Einstein Observatory Medium Sensitivity Survey contains four sources identified with BL Lac objects. The radio and optical properties of these objects have been described in Stocke et al. (1985).

Type
II. Continuum Emission
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 265 - 266
Copyright
Copyright © Reidel 1986 

References

Stocke, J.T., Liebert, J., Schmidt, G.D., Gioia, I.M., Maccacaro, T., Schild, R.T., Maccagni, D., and Arp, H.C. 1985, Ap. J. 298, 619.Google Scholar
Giommi, P., Barr, P., Gioia, I.M., Maccacaro, T., Schild, R., Garilli, B., and Maccagni, D. 1986, Ap. J. (in press).Google Scholar
Bonometto, G.T., and Rees, M.J. 1971, M.N.R.A.S. 152, 21.Google Scholar