TCP J08374922+0134065: emergence of ordinary superhumps

The most recent time-series data after 11th April by Josch Hambsch and Peter Starr in VSNET and AAVSO shows single-peaked + eclipse variations with a period of 0.06044(6) d, likely ordinary superhumps. The refined early superhump period is 0.05947(3) d.

Further observations are encouraged to establish its superhump evolution.

Best regards, Yusuke

2025年4月7日(月) 10:14 Yusuke Tampo tampo@kusastro.kyoto-u.ac.jp:

TCP J08374922+0134065: new WZ Sge-type dwarf nova with large early superhump amplitude

TCP J08374922+0134065 was discovered by Y. Nakamura on 3rd April at 14.7 mag. Based on the suggested counterpart (GALEX J083749.2+013407) with g=20.22(2) and the brightest ASAS-SN measurement with g~13.4 mag, the outburst amplitude is 6.8mag. http://www.cbat.eps.harvard.edu/unconf/followups/J08374922+0134065.html

https://asas-sn.osu.edu/sky-patrol/coordinate/dce846f3-485d-4614-bace-a8b3e8...

Itoh-san has reported the time-resolved observations on 6th April and the light curve shows a double-peaked modulation with a period of ~0.059 d and an amplitude of 0.2 mag with possible eclipses. Thus TCP J08374922+0134065 is a new WZ Sge-type dwarf nova with high inclination. Time-resolved observations are strongly encouraged.

Best regards, Yusuke

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South African Astronomical Observatory, Postdoc fellow 反保 雄介 Yusuke TAMPO MAIL: tampo@kusastro.kyoto-u.ac.jp MAIL: yusuke@saao.ac.za

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