[vsnet-alert 12899] ER UMa : clearly shorter negative superhump appeared

[Ohshima]

ER UMa : clearly shorter negative superhump appeared!


  We have received further pbservations from Akazawa-san, de Miguel,
Krajci, and Stein. According to these data, the period change at the
start of this outburst is clear. The refined superhump period after
Feb 23 7:00 GMT, 0.06205 (4) d. Further observations are strongly
encouraged!