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Swift observations of the X-ray and UV evolution of V2491 Cyg (Nova Cyg 2008 No. 2)

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posted on 2012-10-24, 09:06 authored by K. L. Page, J. P. Osborne, P. A. Evans, A. P. Beardmore, R. L. C. Starling, G. A. Wynn, M. F. Bode, A. Ibarra, J-U. Ness, E. Kuulkers, G. J. Schwarz
We present extensive, high-density Swift observations of V2491 Cyg (Nova Cyg 2008 No. 2). Observing the X-ray emission from only one day after the nova discovery, the source is followed through the initial brightening, the super-soft source phase and back to the pre-outburst flux level. The evolution of the spectrum throughout the outburst is demonstrated. The UV and X-ray light curves follow very different paths, although changes occur in them around the same times, indicating a link between the bands. Flickering in the late-time X-ray data indicates the resumption of accretion. We show that if the white dwarf (WD) is magnetic, it would be among the most magnetic known; the lack of a periodic signal in our later data argues against a magnetic WD, however. We also discuss the possibility that V2491 Cyg is a recurrent nova, providing recurrence time-scale estimates.

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Citation

Monthly Notices of the Royal Astronomical Society, 2010, 401 (1), pp. 121-130

Version

  • VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press

issn

0035-8711

eissn

1365-2966

Copyright date

2009

Available date

2012-10-24

Publisher version

http://mnras.oxfordjournals.org/content/401/1/121

Language

en

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