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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

References

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