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Swift observations of the March 2011 outburst of the cataclysmic variable NSV 1436: a probable dwarf nova (Research Note)

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posted on 24.10.2012, 09:10 by J. P. Osborne, K. L. Page, A. A. Henden, J. -. U. Ness, M. F. Bode, G. J. Schwarz, S. Starrfield, J. J. Drake, E. Kuulkers, A. P. Beardmore
Aims. The March 2011 outburst of the poorly-studied cataclysmic variable NSV 1436 offered an opportunity to decide between dwarf nova and recurrent nova classifications. Methods. We use seven daily observations in the X-ray and UV by the Swift satellite, together with AAVSO V photometry, to characterise the outburst and decline behaviour. Results. The short optical outburst coincided with a faint and relatively soft X-ray state, whereas in decline to fainter optical magnitudes the X-ray source was harder and brighter. These attributes, and the modest optical outburst amplitude, indicate that this was a dwarf nova outburst and not a recurrent nova. The rapid optical fading suggests an orbital period below 2 h.

History

Citation

Astronomy & Astrophysics, 2011, 533

Version

VoR (Version of Record)

Published in

Astronomy & Astrophysics

Publisher

EDP Sciences for European Southern Observatory (ESO)

issn

0004-6361

Copyright date

2011

Available date

24/10/2012

Publisher version

http://www.aanda.org/articles/aa/abs/2011/09/aa17088-11/aa17088-11.html

Language

English