Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002babs.conf..243m&link_type=abstract
Blazar Astrophysics with BeppoSAX and Other Observatories, Proceedings of the international workshop, December 10-11, 2001, ASI
Astronomy and Astrophysics
Astronomy
Blazars, Quasars, Radio Galaxies, X Rays, Radio Emission, X Ray Timing Explorer, Accretion Disks, Black Holes (Astronomy)
Scientific paper
We present recent multiwaveband observations centered on X-ray monitoring of blazars and the radio galaxy 3C 120 with the RXTE satellite, In 3C 120, we observed four X-ray dips, each followed by ejections of superluminal radio knots down the jet. This behavior, similar to that of the microquasar GRS 1915+105, is interpreted as infall of a piece of the inner accretion disk causing ejection of energy into the relativistic jet. The X-ray emission from the quasars PKS 1510-089, 3C 279, and 3C 273 is highly variable on timescales as short as approximately 1 day. Over 2 years, X-ray flares in PKS 1510-089 occurred about 2 weeks after radio outbursts, which can be explained by light-travel delays. In 3C 279 the X-ray and optical variations are usually well correlated, with very little, if any, time delay. We conclude that the X-ray and optical emission from blazars occurs near the radio core rather than close to the black hole.
Aller Margo F.
Balonek Thomas J.
Jorstad Svetlana G.
Marscher Alan P.
McHardy Ian M.
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