[vsnet-outburst 9667] OT_J023839.1+355648: refined superhump period, WZ Sge-type?

[Taichi Kato]

OT_J023839.1+355648: refined superhump period, WZ Sge-type?

   Maehara-san and Kyoto-team (observer: Ohshima-san) further provided
new observations.  Based on two-night observations, we obtained
a refined superhump period of 0.05373(4) d, which confirm the short-period
nature of this object (vsnet-alert 10667).  Before these superhumps
appeared, there was a weak signal of semi-periodic modulations
with a period of 0.05319(1) d and full amplitude of 0.06 mag.
The double-humped profile suggests that these modulations were
early superhumps of a WZ Sge-type(or -like) dwarf nova.
If these periods are superhump and orbital periods, the fractional
period excess is 1.0%, typical for a WZ Sge-type dwarf nova.
The period would make the shortest record among WZ Sge-type dwarf novae.
Further observations are strongly encouraged.