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Study of the cyclotron feature in MXB 0656-072\ud

By V. A. McBride, J. Wilms, M. J. Coe, I. Kreykenbohm, Richard E. Rothschild, W. Coburn, J. L. Galache, P. Kretschmar, W. R. T. Edge and R. Staubert


We have monitored a type II outburst of the Be/X-ray binary MXB 0656−072 in a series of pointed RXTE observations during October through December 2003. The source spectrum shows a cyclotron resonance scattering feature at 32.8 +0.5\ud −0.4 keV, corresponding to a magnetic field strength of 3.67\ud +0.06 −0.04 × 10 12 G and is stable through the outburst and over the pulsar spin phase. The pulsar, with an average pulse period of 160.4 ± 0.4s,shows a spin-up of 0.45 s over the duration of the outburst. From optical data, the source distance is estimated to be 3.9 ± 0.1 kpc and this is used to estimate the X-ray luminosity and a theoretical prediction of the pulsar spin-up during the outburst.\u

Topics: QB
Publisher: EDP Sciences
Year: 2006
OAI identifier: oai:wrap.warwick.ac.uk:3544

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  1. (2005). Ph.D. Thesis (University of California,

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