Journal Article

Completing the puzzle of the 2004–2005 outburst in V0332+53: the brightening phase included

S. S. Tsygankov, A. A. Lutovinov and A. V. Serber

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 401, issue 3, pages 1628-1635
Published in print January 2010 | ISSN: 0035-8711
Published online January 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.15791.x
Completing the puzzle of the 2004–2005 outburst in V0332+53: the brightening phase included

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Analysis of the data obtained with the RXTE observatory during a powerful outburst of the X-ray pulsar V0332+53 in 2004–2005 is presented. Observational data covering the outburst brightening phase are analysed in detail for the first time. A comparison of source parameters and their evolution during the brightening and fading phases shows no evidence for any hysteretic behaviour. It is found that the dependences of the energy of the cyclotron absorption line on the luminosity during the brightening and fading phases are almost identical. The complete data sequence including the outburst brightening and fading phases makes it possible to impose the more stringent constraints on the magnetic field in the source. The pulse profile and pulsed fraction are studied as functions of the luminosity and photon energy.

Keywords: pulsars: individual: V0332+53; X-rays: binaries

Journal Article.  5573 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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