Relative Timing of X-ray, UV, and Optical Dips in the Radio Galaxy 3C 120
Abstract
We have recently completed a year-long program to monitoring the FR 1 radio galaxy 3C 120 at optical, UV, and X-ray bands with the Swift satellite. The light curves reveal several sharp dips in the X-ray, UV, and optical flux. During this period, a number of superluminal knots appeared in the jet, as seen in our approximately monthly 43 GHz VLBA images. The relative timing of the flux minima at the different bands provides information on the locations of the emission sites in the accretion disk-corona system. The relationship between the dips and delayed passage of new knots through the stationary core, situated about 0.5 pc downstream of the black hole, sheds light on the disk-jet connection. The presentation will compare the results of the authors' analysis of the data with the expectations of various theoretical models for the inner disk-corona.This research was supported in part by NASA through the Swift and Fermi guest investigator programs, grants NNX16AN69G and NNX14AQ58G.
- Publication:
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AAS/High Energy Astrophysics Division #16
- Pub Date:
- August 2017
- Bibcode:
- 2017HEAD...1610611M