[vsnet-alert 13001] SDSS J122740.83+513925.0: superhumps update

[Taichi Kato]

SDSS J122740.83+513925.0: superhumps update

   Arto Oksanen (Hankasalmi Obs.) has reported further observations.
The period of superhumps systematically varied on March 15:
the mean periods before and after then were 0.06495(5) d and 0.06450(11) d,
respectively.  There have been very strong beat phenomenon and the amplitudes
of superhumps varied between 0.15 mag and >0.4 mag.  The above change in
the period may have been a result of this strong beat phenomenon;
further observations are need to see whether the change is related to
a stage transition.