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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    X-ray and ultra-violet observations of Markarian 421


    Contributors:

    Published in:

    Publication date :

    1988-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Ultra violet light and its uses

    Rentschler, H.C. | Engineering Index Backfile | 1931


    Interferometry at the Vacuum Ultra-Violet Limit

    Thorne, A. P. et al. | British Library Online Contents | 1993


    Ultra-violet light sanitizing of a vehicle

    KYLE ROGER AKIRA / WANG TIMOTHY / YAMASAKI BRYAN E | European Patent Office | 2023

    Free access

    ULTRA-VIOLET LIGHT SANITIZING OF A VEHICLE

    KYLE ROGER AKIRA / WANG TIMOTHY / YAMASAKI BRYAN E | European Patent Office | 2021

    Free access

    Ultra-Violet and White Lighting for Aircraft Instruments

    Chittenden, P. | Emerald Group Publishing | 1958