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XTE J1908+094 is an X-ray transient black hole candidate in the Galacticplane that was observed in outburst in 2002 and 2013. Here we presentmulti-frequency radio and X-ray data, including radio polarimetry, spanning theentire period of the 2013 outburst. We find that the X-ray behaviour of XTEJ1908+094 traces the standard black hole hardness-intensity path, evolving froma hard state, through a soft state, before returning to a hard state andquiescence. Its radio behaviour is typical of a compact jet that becomesquenched before discrete ejecta are launched during the late stages of X-raysoftening. The radio and X-ray fluxes, as well as the light curve morphologies,are consistent with those observed during the 2002 outburst of this source. Thepolarisation angle during the rise of the outburst infers a jet orientation inagreement with resolved observations but also displays a gradual drift, whichwe associate with observed changes in the structure of the discrete ejecta. Wealso observe an unexpected 90deg rotation of the polarisation angle associatedwith a second component.

Radio polarimetry as a probe of unresolved jets: the 2013 outburst of XTE J1908+094