[vsnet-alert 2481] SU UMa superoutburst confirmed

[Taichi Kato <tkato>]

SU UMa superoutburst confirmed

   The CCD time series on Dec. 28 (Ouda team rooftop station, 25-cm SCT +
ST-7 unfiltered) clearly revealed the presence of superhumps, thus confirming
the present outburst as a genuine superoutburst.  The superhumps looked
like just growing; the amplitude increased from 0.12 mag to ~0.20 mag in
one cycle.  The most remarkable feature was the superimposed detection of
"super-QPOs", large-amplitude QPOs occasionally observed during the early
stage of superoutbursts.  The super-QPOs observed in SU UMa showed a typical
amplitude of 0.05 mag, and a typical oscillation period of 10-15 min.

   For more information of the super-QPOs, see

http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/superqpo.html

   Follow-up observations are strongly recommended.

Regards,
Taichi Kato

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