Abstract We present a physical interpretation of the the dramatic spectral variability observed in the XUV band of the X-ray bright BL Lac type object Markarian 421 (Mrk421). We show that a conical relativistic jet model can adequately explain the data if the upper cut-off in the synchrotron emitting electron population has a variable radial dependence. The physical parameters in the region of the jet responsible for the bulk of the X-ray emission in Mrk421 are derived in the context of such a model.
X-ray and ultra-violet observations of Markarian 421
Advances in Space Research ; 8 , 2-3 ; 95-98
1988-01-01
4 pages
Article (Journal)
Electronic Resource
English
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