The jets in radio galaxy B1308-441

The giant radio galaxy B1308-441 has prominent two-sided jets, typical of Fanaroff-Riley class I radio galaxies, but there is an unusual bright spot in the SE jet 2 arcmin from the core that gives a marked asymmetry to the source. Observations at 1.37 and 2.37 GHz with the Australia Telescope Compact Array show that the bright spot has a flattened spectrum and high polarisation and changes the direction of the SE jet. There is a diffuse optical object close to the bright spot which may be related to a shock in the jet.