30 May
2025
30 May
'25
10:03 a.m.
ASASSN-25ca: new SU UMa-type dwarf nova
ASAS-SN reported ASASSN-25ca on 2025-05-20 at g=14.1. https://www.aavso.org/vsx/index.php?view=detail.top&oid=10848671
Berto Monard and Josch Hambsch reported the time-resolved observations of ASASSN-25ca. Their observations on 29 May show ordinary superhumps with a period of 0.0588(1) d. Observations on 27 May also show a hint of superhumps but the baseline was too short. Thus, ASASSN-25ca is a new SU UMa-type dwarf nova, and could be a WZ Sge-type based on its short superhump period, large outburst amplitude, and lack of previous outbursts.
Best regards, Yusuke
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South African Astronomical Observatory, Postdoc fellow
Yusuke TAMPO / 反保 雄介
EMAIL: tampo@kusastro.kyoto-u.ac.jp
ALT. EMAIL: yusuke@saao.ac.za
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