[vsnet-alert 13016] ER UMa : fading and negative superhumps

[Ohshima]

ER UMa : fading and negative superhumps

 We have further observations from Shugarov Sergey and Special
Astrophysical Observatory (observer: Nataly Katysheva and 
Vitaly Goranskij). 
 This unique object is now returning to the minimum. Since this
outburst have lasted more than 20 days (including brightening stage),
this outburst seems to have evolved almost fully.
 Only positive superhumps were seen in the earlier stage of this
superoutburst. However, negative superhumps was superimposed in the later
stage. Additionally variations with period nearly the orbital period
was temporarily detected.
 Further observations are still required!