[vsnet-alert 9871] V591 Cen outburst - observations requested

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Fri Feb 1 11:12:04 JST 2008

  Rod Stubbings also reported that V591 Cen is in outburst.

  20080131.562   148  (Rod Stubbings)

  Past outburst observations, mainly by Rod Stubbings, seems
to imply a dwarf nova with a relatively long cycle length.
The outbursts in 1999, 2000 and 2006 had durations suggestive
of superoutbursts.  Woudt et al. (2007) MNRAS 364, 107 showed
no flickering in the proposed quiescent counterpart, whose
spectrum is a G dwarf (Schmidtobreick et al. 2007, PASP 117, 944).
This G-dwarf (apparently observed by Woudt et al.) may be
a chance superposed star, as in the case of V699 Oph.
If the true quiescent counterpart is far fainter than mag 20,
the object may well be a good candidate for an SU UMa-type
dwarf nova.  Accurate astrometry in outburst, time-resolved
photometry and spectroscopy are encouraged.

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