[vsnet-outburst 4949] GZ Cnc outburst

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

GZ Cnc outburst

  YYYYMMDD(UT)   mag  observer
  20021203.319  <145  (Mike Simonsen)
  20021208.149  <147  (Pavol A. Dubovsky)
  20021209.289  <150  (Mike Simonsen)
  20021210.058  <147  (Pavol A. Dubovsky)
  20021210.374  <150  (Mike Simonsen)
  20021212.141  <147  (Pavol A. Dubovsky)
  20021212.415  <150  (Mike Simonsen)
  20021226.656   135  (Rod Stubbings)
  20021226.662   135  (Rod Stubbings)

  The object is currently known as a short Porb (~2 hr) object, which is
a good candidate for an SU UMa-type star.  However, see

  * Kato et al. (2001) IBVS 5123
    absence of superhumps during a long outburst

  * Kato et al. (2002) A&A 396, 929
    unusual clustering of short outbursts

  (Click [2001] and [2002] on the VSNET top page to find more detailed
information for these works.)

  Both suggest that GZ Cnc may be an unusual object.  Further detailed
observations during the present outburst are strongly encouraged!

Regards,
Taichi Kato
VSNET Collaboration team

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