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

P. A. Curran, J. C.A. Miller-Jones, A. P. Rushton, D. D. Pawar, G. E. Anderson, D. Altamirano, H. A. Krimm, J. W. Broderick, T. M. Belloni, R. P. Fender, E. G. Körding, D. Maitra, S. Markoff, S. Migliari, C. Rumsey, M. P. Rupen, D. M. Russell, T. D. Russell, C. L. Sarazin, C. L. SivakoffR. Soria, A. J. Tetarenko, D. Titterington, V. Tudose

Research output: Contribution to journalArticlepeer-review


XTE J1908+094 is an X-ray transient black hole candidate in the Galactic plane that was observed in outburst in 2002 and 2013. Here we present multifrequency radio and X-ray data, including radio polarimetry, spanning the entire period of the 2013 outburst. We find that the X-ray behaviour of XTE J1908+094 traces the standard black hole hardness-intensity path, evolving from a hard state, through a soft state, before returning to a hard state and quiescence. Its radio behaviour is typical of a compact jet that becomes quenched before discrete ejecta are launched during the late stages of X-ray softening. 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. The polarization angle during the rise of the outburst infers a jet orientation in agreement with resolved observations but also displays a gradual drift, which we associate with observed changes in the structure of the discrete ejecta. We also observe an unexpected 90° rotation of the polarization angle associated with a second component.

Original languageEnglish (US)
Pages (from-to)3975-3985
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
StatePublished - Apr 24 2015


  • Binaries: close
  • Stars: individual: XTE J1908+094
  • X-rays: binaries
  • X-rays: bursts

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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