[vsnet-outburst 31439] TCP J08374922+0134065: new WZ Sge-type dwarf nova with large early superhump amplitude
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
Hi All,
After finding the alert, I made yesterday evening an observation of this star with a 25cm newton f4.7 and QHY 268M camera with a photometric V filter. At the end of the observation run the altitude neared 30degrees, so I stopped.
This is the curve of it, no outliers were removed. Used the sequence that can be found at the AAVSO. Observations are reported there too : [image: figure_TCP J08374922+0134065.png]
Kind Regards, Pieter Vuylsteke, GardenToTheSkyFacility, Hoegaarden, Belgium.
Op ma 7 apr 2025 om 10:15 schreef 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
--
South African Astronomical Observatory, Postdoc fellow 反保 雄介 Yusuke TAMPO MAIL: tampo@kusastro.kyoto-u.ac.jp MAIL: yusuke@saao.ac.za
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
--
South African Astronomical Observatory, Postdoc fellow 反保 雄介 Yusuke TAMPO MAIL: tampo@kusastro.kyoto-u.ac.jp MAIL: yusuke@saao.ac.za
vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp
-
Pieter Vuylsteke -
Yusuke Tampo