ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps

Kyoto Univ. team observed ASASSN-22dl on 16th March. Combining with the data from Itoh-san on 15th, we obtained the double-peaked variation with the period of 0.05259(2) or 0.05555(2) d (alias) and the mean amplitude of 0.5 mag.

Judging from its period and phase-averaged profile, I conclude that ASASSN-22dl is a new WZ Sge-type dwarf nova with a large amplitude early superhump.

Also, the quiescence data of ZTF showed a possible variation with the period of 0.052673(1) d and with the double-peaked profile.

Further observations are encouraged!

Best, Yusuke

2022年3月16日(水) 8:55 Taichi Kato tkato@kusastro.kyoto-u.ac.jp:

ASASSN-22dl: superhump or early superhump?

Itoh-san detected large variations up to 0.8 mag. There were two maxima in one cycle and the profile suggest either an early superhump or superhump + eclipse. The period was around 0.054 d. Further observations are encouraged.