1. Radio polarimetry as a probe of unresolved jets: the 2013 outburst of XTE J1908+094.
- Author
-
Curran, P. A., Miller-Jones, J. C. A., Rushton, A. P., Pawar, D. D., Anderson, G. E., Altamirano, D., Krimm, H. A., Broderick, J. W., Belloni, T. M., Fender, R. P., Kording, E. G., Maitra, D., Markoff, S., Migliari, S., Rumsey, C., Rupen, M. P., Russell, D. M., Russell, T. D., Sarazin, C. L., and Sivakoff, G. R.
- Subjects
ASTRONOMICAL polarimetry ,X-ray bursts ,GAS bursts ,STAR formation ,BLACK holes ,OPTICAL polarization ,LIGHT curves - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF