McBride, V. A., Wilms, J. (Joern), Coe, M. J. (Malcolm J.), Kreykenbohm, I., Rothschild, Richard E., 1943-, Coburn, W. (Wayne), Galache, J. L., Kretschmar, P., Edge, W. R. T. and Staubert, R.. (2006) Study of the cyclotron feature in MXB 0656-072. Astronomy & Astrophysics, Vol.451 (No.1). pp. 267-272. ISSN 0004-6361

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Abstract

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 −0.4 keV, corresponding to a magnetic field strength of 3.67 +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.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Double stars, X-ray sources, Galactic, Be stars, Stars -- Magnetic fields, Pulsars, Cyclotron resonance
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Date:	May 2006
Volume:	Vol.451
Number:	No.1
Page Range:	pp. 267-272
Identification Number:	10.1051/0004-6361:20054239
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	National Research Foundation (South Africa), British Council, University of Southampton, Deutsche Forschungsanstalt für Luft- und Raumfahrt (DLR)
Grant number:	50 OG 9601 (DLR), 50 OG 0501 (DLR)
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URI:	http://wrap.warwick.ac.uk/id/eprint/3544

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