[vsnet-alert 13750] OT J214738.4+244553: large period variation

[Taichi Kato]

OT J214738.4+244553: large period variation

   Ohshima-san has probably neglected this object ...

   We have received further observations from Enrique de Miguel,
William~Stein, Gianluca Masi, Crimean Astrophys. Obs. team
(observer Oksana Antonyuk, relayed by Elena Pavlenko) and
Osaka Kyoiku U. team (Ryo Noguchi, Shinichi Nakagawa, Tomoya Aoki,
Hiroshi Kobayashi, Takashi Nomoto, Katsura Matsumoto).

   There has been a distinct, and stepwise, change in the superhump
period during the early stage.  The period was 0.1000(1) d until
October 6 and then decreased to 0.09700(2) d.  The new period has
been almost constant and the variation of the superhump period
resembles a stage B-C transition.