Accreting X-ray pulsars observed with Integral

Details Accreting X-ray pulsars observed with Integral Accreting X-ray pulsars observed with Integral

2007-01-30

arxiv.org/abs/astro-ph/0701869v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in the Proceedings of the 6th Integral Workshop "The obscured Universe", Moscow, July 3-7 2006

Scientific paper

In this paper, we review the observational properties of two accreting X-ray pulsars, the persistent source 4U1907+09 and the transient V0332+53. Accreting X-ray pulsars are among the brightest sources in the X-ray sky and are frequently observed by Integral and other X-ray missions. Nevertheless they are still very enigmatic sources as fundamental questions on the X-ray production mechanism still remain largely unanswered. These questions are addressed by performing detailed temporal and spectral studies on several objects over a long time range. Of vital importance is the study of cyclotron lines as they provide the only direct link to the magnetic field of the pulsar. While some objects show cyclotron lines which are extremely stable with time and with pulse phase, in other objects the lines strongly depend on the pulse phase, the luminosity of the source, or both. Of special interest in any case are transient sources where it is possible to study the evolution of the cyclotron line and the source in general from the onset until the end of the outburst through a wide range of different luminosity states. We present an observational review of a transient and a persistent accreting X-ray pulsar observed with Integral.

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