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Contemporaneous Multiwaveband Observations of Blazars

Published online by Cambridge University Press:  19 July 2016

Alan P. Marscher ,
Steven D. Bloom ,
Yun Fei Zhang  and
Walter K. Gear
Alan P. Marscher
Affiliation:
Department of Astronomy, Boston University, 725 Commonwealth Ave., Boston, MA 02215-1401, USA
Steven D. Bloom
Affiliation:
Department of Astronomy, Boston University, 725 Commonwealth Ave., Boston, MA 02215-1401, USA
Yun Fei Zhang
Affiliation:
Department of Astronomy, Boston University, 725 Commonwealth Ave., Boston, MA 02215-1401, USA
Walter K. Gear
Affiliation:
Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, Scotland, UK

Abstract

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We have observed a number of blazars at wavebands ranging from radio to γ-ray. We find bright γ-ray emission to be associated with strong synchrotron flares observed at lower frequencies. The X-ray flux and entire radio spectrum of 4C 39.25 have each increased in strength by 30% over a 2-year period, in agreement with the prediction of the bent relativistic jet model.

Keywords

quasarsBL Lac objectsγ raysmultifrequency observations
Type
Variability
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 155 - 158
Copyright
Copyright © Kluwer 1994 

References

Alberdi, A., Marcaide, J.M., Marscher, A.P., Zhang, Y.F., Elósegui, P., Gómez, J.L., and Shaffer, D.B. 1993, Astrophysical Journal , 402, 160–172 Google Scholar
Bloom, S.D., et al., Astronomical Journal , submitted Google Scholar
Bloom, S.D., and Marscher, A.P. 1993, in Compton Gamma-Ray Observatory, AIP Conference Proceedings , 280, ed. Friedlander, M., Gehrels, N., and Macomb, D.J. (New York: American Institute of Physics), pp. 578–582 Google Scholar
Hunter, S.D., et al. 1993, Astrophysical Journal , 409, 134–138 CrossRefGoogle Scholar
Marscher, A.P. 1993, in Astrophysical Jets, STScI Symposium Series , 6, ed. Burgarella, D., Livio, M., and O'Dea, C. (Cambridge University Press), in press Google Scholar
Marscher, A.P., Zhang, Y.F., Shaffer, D.B., Aller, H.D., and Aller, M.F. 1991, Astrophysical Journal , 371, 491–500 Google Scholar
Nolan, P.L., et al. 1993, IAU Circular no. 5802 Google Scholar
Reich, W., et al. 1993, Astronomy and Astrophysics , 273, 65–78 Google Scholar
Sreekumar, P., et al. 1993, IAU Circular no. 5753 Google Scholar
Zhang, Y.F., Marscher, A.P., Aller, H.D., Aller, M.F., Teräsranta, H., and Valtaoja, E. 1994, Astrophysical Journal , submitted Google Scholar