[vsnet-alert 25433] ZTF20acyxwzf = ASASSN-21au: rapid fading with superhump-like variations

[Kojiguchi Naoto]

ZTF20acyxwzf = ASASSN-21au: rapid fading with superhump-like variations

     Itoh-san, Kubotera-san, Tonny Vanmunster, Kyoto U. team, Tamas Tordai, Moriyama-san and Maehara-san have reported further observations.
According to observations by Itoh-san, Kubotera-san and Kyoto U. team, this object shows rapid fading with superhump-like variations on Feb. 21.
The superhump-like variations period is 0.0405 d. According to my O-C analysis, the superhump-like variations period seems almost constant, but the phase average profile seems to be changing.

This object is showing very interesting behavior.

Time-resolved photometry is encouraged.
Even if this object is faint, nightly snapshots are important. Because this object is likely to cause rebrightenings.

   20210218.058 13.710CV Van
   20210218.475 13.575C Kub
   20210218.477 13.646C Ioh
   20210218.812 13.594CV Trt
   20210219.071 13.788CV Van
   20210219.422 13.755C Ioh
   20210219.430 13.596C Kub
   20210219.758 138C Myy
   20210219.861 132 Mhh
   20210220.424 13.712C Ioh
   20210220.503 13.789C Kub
   20210220.804 132 Mhh
   20210221.417 14.001C Ioh
   20210221.586 14.316C Kub