[vsnet-alert 12973] ER UMa : negative superhumps

[Ohshima]

ER UMa : negative superhumps

 We have received further observations from Akazawa-san, Tom Krajci, and
Shiokawa-san. Using data after March 10, 0.06223 (4) d is obtained with
PDM analysis. It seems that negative superhumps clearly appeared.
 Interestingly, this period is almost same as one in the previous
superoutburst. This implies that the period of negative superhumps
probably depends on the system parameter.
 Further observations are strongly required!