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Radio polarimetry as a probe of unresolved jets: the 2013 outburst of XTE J1908+094
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- Author(s) / Creator(s)
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- Curran, P. A.
- Miller-Jones, James C. A.
- Rushton, Anthony P.
- Pawar, Devraj D.
- Anderson, G. E.
- Altamirano, Diego
- Krimm, H. A.
- Broderick, J. W.
- Belloni, Thomaso M.
- Fender, Rob P.
- Körding, E. G.
- Maitra, D.
- Markoff, Sera
- Migliari, Simone
- Rumsey, C.
- Rupen, Michael P.
- Russell, D. M.
- Russell, Thomas D.
- Sarazin, Craig L.
- Sivakoff, Gregory Robert
- Soria, Roberto
- Tetarenko, Alexandra Jean
- Titterington, David
- Tudose, Valeriu
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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.
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- Date created
- 2015-01-01
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- Subjects / Keywords
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- Type of Item
- Article (Published)
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- License
- This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.