[vsnet-alert 13983] ER UMa : negative superhumps

[Ohshima]

ER UMa : negative superhumps

 We have received further observations from Enrique 
de Miguel.
 ER UMa returned to the minimum, showing negative
superhumps. Although the variations of superhumps got
unclear at the maxima of normal outburst, the superhump
peaks before and after this unclear phase can be connected
without phase shift. This implies that the origin of 
superhumps did not change before and after the unclear 
phase.