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- W2000636645 abstract "We have produced deep radio maps of the double quasar 0957+561 from multiple-epoch VLA observations. To achieve high sensitivity to extended structure we have rereduced the best available 1.6 GHz observations and have combined 5 GHz data from multiple array configurations. Regions of faint emission approximately 15'' north and south of the radio source G are probably lobes associated with the lensing galaxy. An arc 5'' to the east of G may be a stretched image of emission in the background quasar's environment. At 14 southwest of G we detect a source that we interpret as an image of emission from the quasar's western lobe, which could provide a constraint on the slope of the gravitational potential in the central region of the lens. We explore the consequences of these new constraints with simple lens models of the system." @default.
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- W2000636645 date "1997-10-20" @default.
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- W2000636645 title "Low Surface Brightness Radio Structure in the Field of Gravitational Lens 0957+561" @default.
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- W2000636645 doi "https://doi.org/10.1086/310938" @default.
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