[vsnet-outburst 26885] ASASSN-21dc: new WZ Sge star

[Taichi Kato]

ASASSN-21dc: new WZ Sge star

   Itoh-san, Berto Monard, Kyoto U team, Josch Hambsch
and Tonny Vanmunster have reported observations.
The object showed superhumps on Mar. 21 and 22
(probably with growing amplitudes) in Monard's data.
The period is 0.05654(6) d
(with some possibilities of one-day aliases)
and the amplitude is 0.17 mag.
The superhumps were not very evident in
Hambsch's data in the same interval (other observers
did not report observations) probably due to
the small number of points (this is apparently
a limit of sparse data sampling).

   An analysis of the earlier part of the data
yielded a possible period of 0.05507(9) d
with an amplitude of 0.025 mag.  This signal
may be early superhumps, but the identification
is not secure due to the low amplitude.

   The waiting time is 10 d, which is comparable
to those of WZ Sge stars.  Combined with possible
early superhumps and a large outburst amplitude,
this object is most likely a WZ Sge star.