[vsnet-alert 10161] QW Ser fading: normal outburst or precursor?

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Tue May 6 12:20:04 JST 2008

   Nakajima-san reported that QW Ser had faded to mag 15.4 on May 5
and the object was still fading.  This outburst, despite its brightness,
may be a normal outburst (as in 2006 May) or may be a precursor to
a genuine superoutburst.  Since the mean supercycle suggests that the
next superoutburst is already due, continue observing to see if
the present outburst triggers a superoutburst.  Time-resolved photometry
at such a stage will be very important to understand the mechanism.

  YYYYMMDD(UT)   mag  observer
  20080502.724  <146  (Yutaka Maeda)
  20080503.469   137  (Rod Stubbings)
  20080503.676   127  (Yutaka Maeda)
  20080503.938   129  (Hubert Hautecler)
  20080504.1810 13.216V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))

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