[vsnet-alert 13217] ER UMa : rising now

[Ohshima]

ER UMa : rising now!

 We have further observations from Ian Miller, Crimean Astrophy. Obs.,
Josch Hambsch, Okayama Univ. of Sci., and Javier Ruiz. And we also took
observations.
 According to these data, this object is apparently started to brighten.
Negative superhumps are still seen though the profile is sometimes similar
to that of positive superhumps. We observed this object tonight. Dispite
clowdy sky, this object seemed to brighten furthermore, a little brighter
than the maximum of nomal outburst.
 It is unclear whether this outburst is a superoutburst.
 In the last superoutburst, the amplitude of superhumps got very shallower
when the transition from negative superhumps to positive superhumps.
Such phenomenon may be in the very near future. Further observations are
strongly encouraged!