[vsnet-alert 22561] Re: ASASSN-18vn: stage A-B transition

[Yasuyuki WAKAMATSU]

Josch Hambsch reported further observations. The stage transition occurred
on September 21. The updated period of stage A superhumps is 0.05804(2) d.
The mass ratio derived from periods of early and stage A superhumps is
0.10(1).

(2018/09/25 2:05), Yasuyuki WAKAMATSU wrote:
> ASASSN-18vn: stage A-B transition
>
> Josch Hambsch and Berto Monard reported further observations.
> The object showed the clear stage A-B transition on September 22.
> The (stage B) superhump period is now 0.0576(3) d and the amplitude
> is 0.2 mag. The period of stage A superhumps is 0.05808(2) d.
> Further observations are needed to derive the more accurate period of
> stage B superhumps and Pdot.
>