Progress in understanding Blazars from BeppoSAX observations

Details Progress in understanding Blazars from BeppoSAX observations Progress in understanding Blazars from BeppoSAX observations

1999-02-03

arxiv.org/abs/astro-ph/9902059v1

Astronomy and Astrophysics

Astrophysics

10 pages, 8 figures, to be published in the Proceedings of the 32nd COSPAR Meeting, Nagoya, 12-19 July 1998

Scientific paper

10.1016/S0273-1177(99)00828-5

Results obtained with BeppoSAX observations of blazars within various collaborative programs are presented. The spectral similarity "paradigm", whereby the spectral energy distributions of blazars follow a sequence, leading to a unified view of the whole population, is briefly illustrated. We concentrate on recent observations of flares and associated spectral variability for three objects at the "blue" end of the spectral sequence, namely PKS 2155-304, Mkn 421 and Mkn 501. The results are discussed in terms of a general analytic synchrotron self-Compton interpretation of the overall spectrum. The physical parameters of the quasi-stationary emission region can be derived with some confidence, while the variability mechanism(s) must be complex.

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