January 2024 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 10238] TCP J07593036+0459025: new SU UMa-type dwarf nova
by Taichi Kato 30 Jan '24

30 Jan '24

TCP J07593036+0459025: new SU UMa-type dwarf nova According to the observations by Itoh-san, this object showed clear superhumps on Jan. 28 (not very apparent on preceding nights). The period is about 0.06 d. Josch Hambsch also detected superhumps on Jan. 29.

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[vsnet-newvar 10237] TCP J12584767-0849071 = ASASSN-24ao: new SU UMa-type dwarf nova
by Taichi Kato 28 Jan '24

28 Jan '24

TCP J12584767-0849071 = ASASSN-24ao: new SU UMa-type dwarf nova According to the observations by Itoh-san, this object showed clear superhumps on Jan. 26 (not very apparent on Jen. 24 but may have started appearing). The period is about 0.063 d. Although Josch Hambsch reported observations, the data showed unrealistic large-amplitude variations (probably due to some systematic cause) and were not used in this analysis.

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[vsnet-newvar 10236] ASASSN-24ah: new SU UMa (or WZ Sge) star, rebrightening and superhumps
by Taichi Kato 26 Jan '24

26 Jan '24

ASASSN-24ah: new SU UMa (or WZ Sge) star, rebrightening and superhumps This object showed a dip and rebrightening. YYYYMMDD(UT) mag observer 20240115.6584 14.67C (Masayuki Moriyama) 20240119.5520 14.97C (Masayuki Moriyama) 20240121.7547 <151C (Masayuki Moriyama) 20240121.8954 <173C (Masao Funada) 20240122.8613 <174C (Masao Funada) 20240124.5826 14.95C (Masayuki Moriyama) 20240125.5979 14.85C (Masayuki Moriyama) Observations by Tamas Tordai on Jan. 25-26 showed superhumps with a period of 0.0602(4) d and an amplitude of 0.11 mag. The object was rising on Jan. 24 in Tordai's observations. Superhumps were not apparent in observations by Itoh-san before this dip. The plateau-like phase before the dip was long enough, likely excluding a short precursor in an ordinary SU UMa star. This object may be a WZ Sge star in which early superhumps were below the detection limit during the initial outburst. The superhump period suggests a system with multiple rebrightenings if this interpretation is correct.

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[vsnet-newvar 10235] Re: Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova
by Taichi Kato 14 Jan '24

14 Jan '24

Re: Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova > Itoh-san reported observations on four nights and detected > developing superhumps since Jan. 13. The superhump period is > 0.06462(8) d (stage A or A+B combined). The current amplitude > is 0.2 mag. Josch Hambsch also reported the same object (=ASASSN-24af). The combined data (mean epoch of the data slightly earlier) yielded a longer period of 0.06487(5) d, probably more reflecting stage A superhumps.

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[vsnet-newvar 10234] Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova
by Taichi Kato 14 Jan '24

14 Jan '24

Wils_SDSSJ091741.29+073647.4 = TCPJ09174122+0736487: new SU UMa-type dwarf nova Itoh-san reported observations on four nights and detected developing superhumps since Jan. 13. The superhump period is 0.06462(8) d (stage A or A+B combined). The current amplitude is 0.2 mag.

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[vsnet-newvar 10233] Gaia18bvd = ASASSN-24ab: new SU UMa-type dwarf nova
by Taichi Kato 09 Jan '24

09 Jan '24

Gaia18bvd = ASASSN-24ab: new SU UMa-type dwarf nova Josch Hambsch has reported observations on two nights. Superhumps with a period of 0.06363(7) d and an amplitude of 0.20 mag were clearly detected.

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[vsnet-newvar 10232] ATLAS23xus = TCPJ03433597-1153124: superhump period
by Taichi Kato 06 Jan '24

06 Jan '24

ATLAS23xus = TCPJ03433597-1153124: superhump period Current period: 0.05565(2) d. Amplitude: 0.12 mag Observers: Itoh-san, Berto Monard, Greg Bolt

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[vsnet-newvar 10231] Gaia24aaq: new SU UMa-type dwarf nova
by Taichi Kato 06 Jan '24

06 Jan '24

Gaia24aaq: new SU UMa-type dwarf nova Berto Monard reported observations on four nights. Superhumps were present on three nights. The period is 0.05527(2) d and the amplitude is 0.21 mag.

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[vsnet-newvar 10230] ATLAS23xus = TCPJ03433597-1153124: ordinary superhumps
by Taichi Kato 03 Jan '24

03 Jan '24

ATLAS23xus = TCPJ03433597-1153124: ordinary superhumps The most recent data (Jan. 2) by Itoh-san recorded probable ordinary superhumps (rather fragmentary data). The long waiting time and the large outburst amplitude suggest a WZ Sge star.

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