[vsnet-alert 13222] ER UMa : irregular variations?

[Ohshima]

ER UMa : irregular variations?

 We have received further observations from Akazawa-san, Crimean Astrophy. 
Obs., Ian Miller, and Pavol A. Dubovsky. And we also took observations
although enough data cannot be obtained because of cloud.
 This object was showing further brightening. This outburst may be a
superoutburst although the magnitude in the newest data was as bright as 
the maximum of normal outburst.
 The amplitude of superhumps temporalily got to shallow at Apr. 21.7.
Such behavior occurred in the last superoutburst at the similar phase
(even the magnitude where this phenomenon occurred seem to be similar,
not confirmed due to the observation blank). In the last superouutburst,
positive superhumps occurred after this phenomenon. Meanwhile in this
outburst, variations of the period is neither negative superhumps nor
positive superhumps, ever known. Although the value of period is not 
stable, 0.04 - 0.075 d. Positive superhumps may appear after.
 Further observatopns are encouraged in order to the evolution of
variations!