Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gsfc.reptq....m&link_type=abstract
Final Technical Report National Aeronautics and Space Administration. Goddard Space Flight Center, Greenbelt, MD.
Astronomy and Astrophysics
Astronomy
Bl Lacertae Objects, Extragalactic Radio Sources, Models, Plasma Jets, Relativistic Effects, Compton Effect, Spectrum Analysis, Synchrotron Radiation, Ultraviolet Astronomy, X Ray Astronomy
Scientific paper
Coordinated observation of the nearby BL Lacertae object Mrk 421 obtained during May 1980, January 1984, and March 1984 are described. These observations give a time-frozen picture of the continuous spectrum of Mrk 421 at X-ray, ultraviolet, optical, and radio wavelengths. The observed spectra have been fitted to an inhomogeneous relativistic jet model. In general, the models reproduce the data well. Many of the observed differences during the three epochs can be attributed to variations in the opening angle of the jet and in the angle that the jet makes to the line of sight. The jet models obtained here are compared with the homogeneous, spherically symmetric, synchrotron self-Compton models for this source. The models are also compared with the relativistic jet models obtained for other active galactic nuclei.
Hutter Donald J.
Kondo Yoshihiko
Mufson Stuart Lee
Wisniewski Weislaw Z.
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