Wilms J (2007)
Publication Status: Published
Publication Type: Journal article
Publication year: 2007
Publisher: EDP SCIENCES S A
Book Volume: 470
Pages Range: 1065-1070
Journal Issue: 3
DOI: 10.1051/0004-6361:20077238
Context. Accreting X-ray pulsars provide us with laboratories for the study of extreme gravitational and magnetic fields, hence accurate descriptions of their observational properties contribute to our understanding of this group of objects.Aims. We aim to detect a cyclotron resonance scattering feature in the Be Be/X-ray binary Cep X-4 and to investigate pulse profile and spectral changes through the outburst.Methods. Spectral fitting and timing analysis are employed to probe th the properties of Cep X-4 during during an outburst in 2002 June.Results. A previously announced cyclotron feature at 30.7 keV is confirmed, while the source shows spectral behaviour and luminosity related changes similar to those observed in previous outbursts. The long-term X-ray lightcurve shows a periodicity at 20.85 d, which could be attributed to the orbit in this Be system.
APA:
Wilms, J. (2007). On the cyclotron line in cepheus X-4. Astronomy & Astrophysics, 470(3), 1065-1070. https://dx.doi.org/10.1051/0004-6361:20077238
MLA:
Wilms, Jörn. "On the cyclotron line in cepheus X-4." Astronomy & Astrophysics 470.3 (2007): 1065-1070.
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