Low surface brightness radio structure in the field of gravitational lens 0957+561

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 are 5 '' to the east of G may be a stretched image of emission in the background quasar's environment. At 1.'' 4 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.