[vsnet-campaign-dn 7350] ER UMa: negative superhumps!

[Taichi Kato]

ER UMa: negative superhumps!

   Akazawa-san (Okayama U. of Sci. team) has reported observations on
three nights.  The combined data can be well expressed (O-C's within 0.005 d)
by a period of 0.06224(1) d.  This superhump period is shorter than Porb
(0.06366(3) d) by 2.3%.  To my knowledge, this is the first indication
of negative superhumps during an SU UMa (ER UMa)-type superoutburst.
Detailed analysis will be presented by Ohshima-san.