[vsnet-alert 12958] ER UMa: negative superhumps intermittently appear?

[Ohshima]

ER UMa: negative superhumps intermittently appear?

 We have received further observations from Josch Hambsch,
William Stein, Tom Krajci, Shiokawa-san, and Kasai-san.
According to these data, this object was exhibiting unusual
variations as mentioned in the previous mail. However, variations
like ordinary superhumps were temporarily seen again around
March 8.5 ~ 9.1. Based on the times of maxima, the period of 
variation during this term is 0.064 ~ 0.065 d. This value implies
that these are positive superhumps. Negative superhumps may appear
intermittently. As another interesting matter, this outburst appear
to be declining more rapidly than the previous one.
Further observation are required!