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|a Lohfink, Anne M.
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|a MIT Kavli Institute for Astrophysics and Space Research
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|a Nowak, Michael A.
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|a Reynolds, Christopher S.
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|a Jorstad, Svetlana G.
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|a Marscher, Alan P.
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|a Miller, Eric D.
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|a Aller, Hugh
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|a Aller, Margo F.
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|a Brenneman, Laura W.
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|a Fabian, Andrew C.
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|a Miller, Jon M.
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|a Mushotzky, Richard F.
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|a Nowak, Michael A.
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|a Tombesi, Francesco
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|a AN X-RAY VIEW OF THE JET CYCLE IN THE RADIO-LOUD AGN 3C120
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|b IOP Publishing,
|c 2015-02-05T20:19:40Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/93878
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|a We present a study of the central engine in the broad-line radio galaxy 3C120 using a multi-epoch analysis of a deep XMM-Newton observation and two deep Suzaku pointings (in 2012). In order to place our spectral data into the context of the disk-disruption/jet-ejection cycles displayed by this object, we monitor the source in the UV/X-ray bands, and in the radio band. We find three statistically acceptable spectral models: a disk-reflection model, a jet model, and a jet+disk model. Despite being good descriptions of the data, the disk-reflection model violates the radio constraints on the inclination, and the jet model has a fine-tuning problem, requiring a jet contribution exceeding that expected. Thus, we argue for a composite jet+disk model. Within the context of this model, we verify the basic predictions of the jet-cycle paradigm, finding a truncated/refilling disk during the Suzaku observations and a complete disk extending down to the innermost stable circular orbit during the XMM-Newton observation. The idea of a refilling disk is further supported by the detection of the ejection of a new jet knot approximately one month after the Suzaku pointings. We also discover a step-like event in one of the Suzaku pointings in which the soft band lags the hard band. We suggest that we are witnessing the propagation of a disturbance from the disk into the jet on a timescale set by the magnetic field.
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|a United States. National Aeronautics and Space Administration (Grant NNX11AQ03G)
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|a National Science Foundation (U.S.) (Grant AST-907893)
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|a Article
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|t Astrophysical Journal
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