[vsnet-alert 10272] GO Com: very early stage? superhumps during a precursor?

[Taichi Kato]

   GO Com superoutburst update:

   ASAS-3 provided a potentially useful negative observation just preceding
Maehara-san's discovery.  If this observation was indeed correct, the
detection of superhumps at this very early stage requires explanation.
Judging from the relatively rapid fading (from Poyner's observation,
and possible declining trend in Maehara-san's observation), we may have
been witnessing a precursor with superhumps (see e.g.
http://adsabs.harvard.edu/abs/1997PASJ...49..583K
The 2003 superoutburst of GO Com didn't show a similar phenomenon,
Imada et al. 2005).  Observations of further development of the outburst
are strongly encouraged.

  YYYYMMDD(UT)   mag  observer
  20080609.965  <148  (Gary Poyner)
  20080610.944  <146  (Gary Poyner)
  20080613.0354 <14.50V  (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))
  20080613.525  137C  (Hiroyuki Maehara)
  20080614.951   142  (Gary Poyner)