- vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27977] ATLAS23xus = TCPJ03433597-1153124: ordinary superhumps
by Taichi Kato 04 Jan '24

04 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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[vsnet-alert 27976] Accelerated brightening of the slow nova AT 2023oom (Vend51) in M31
by FIDRICH Robert 02 Jan '24

02 Jan '24

The extragalactic slow nova AT 2023oom (Vend51) has been significantly brightening at an accelerated rate in the last few days! Tamás Tordai measured it at 18,464CV yesterday evening, recent ZTF data show it at 18.294r this morning. Photometry by Tamás Tordai: AT2023oom 2460305.28908 18.782CV (0.076) AT2023oom 2460311.36725,18.464CV (0.068) AT2023oom 2460309.38930 18.472CV (0.067) ZTF light curve: https://alerce.online/object/ZTF23aatzhso Clear skies, Robert Fidrich HAA/VSS

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[vsnet-alert 27975] CRTS J204618.0-312128 likely superoutburst
by Taichi Kato 15 Dec '23

15 Dec '23

CRTS J204618.0-312128 likely superoutburst Based on past supercycle in ASAS-SN Sky Patrol Photom. DB. YYYYMMDD(UT) mag observer 20231127.0453 <16.522g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20231127.0453 <16.820g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20231128.0308 <17.032g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20231128.0320 <16.458g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20231129.0398 <17.621g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20231129.0398 <17.800g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20231202.4312 <161C (Masayuki Moriyama) 20231213.3959 15.00C (Masayuki Moriyama)

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[vsnet-alert 27974] Re: SwiftJ1727.8-1613: superhumps?
by Taichi Kato 11 Dec '23

11 Dec '23

Re: SwiftJ1727.8-1613: superhumps? (Re: [vsnet-alert 27954] SwiftJ1727.8-1613: superhumps?, Sep. 23) Using the available data since then, the current preferred period is 0.14088(3) d (mean amplitude 0.07 mag, singly peaked). The period of 0.2116(1) d in [vsnet-alert 27954] was 1.5 times of this period.

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[vsnet-alert 27973] TCP J04251906+2841462: ordinary superhumps
by Taichi Kato 06 Dec '23

06 Dec '23

TCP J04251906+2841462: ordinary superhumps According to Itoh-san's observations, this object showed ordinary superhumps since Dec. 3. The current period is 0.05510(4) d. The large amplitude (0.18 mag) seems to preclude a very low-q object.

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[vsnet-alert 27972] TCP J02011347+0139431: new WZ Sge-type dwarf nova
by Taichi Kato 06 Dec '23

06 Dec '23

TCP J02011347+0139431: new WZ Sge-type dwarf nova Itoh-san and Kiyota-san detected early superhumps on two consecutive nights. Typical double-wave modulations with a period of 0.05746(5) d (full amplitude 0.06 mag).

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[vsnet-alert 27971] TCP J18414194+2153095: new SU UMa-type dwarf nova
by Taichi Kato 05 Dec '23

05 Dec '23

TCP J18414194+2153095: new SU UMa-type dwarf nova Itoh-san detected superhumps on two nights (Nov. 28 and Dec. 3). The period has not been determined due to this large gap.

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[vsnet-alert 27970] ASASSN-20pv likely superoutburst (AM CVn)
by Taichi Kato 04 Dec '23

04 Dec '23

ASASSN-20pv likely superoutburst (AM CVn) YYYYMMDD(UT) mag observer 20231203.631 132 (Rod Stubbings)

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[vsnet-alert 27969] SDSS J080249.06+363716.4 = ASASSN-23ic: new SU UMa-type dwarf nova
by Taichi Kato 27 Nov '23

27 Nov '23

SDSS J080249.06+363716.4 = ASASSN-23ic: new SU UMa-type dwarf nova Itoh-san reported observations. Although the object is currently faint (17 mag), superhumps and possible shallow eclipses were seen. The period is 0.05919(2) d. This period expresses superhumps well. Due to the limited coverage, possible eclipses fell at the same superhump phase and the orbital and superhump periods were not distinguished.

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[vsnet-alert 27968] TCP J04251906+2841462: new WZ Sge-type dwarf nova
by Taichi Kato 22 Nov '23

22 Nov '23

TCP J04251906+2841462: new WZ Sge-type dwarf nova Kiyota-san reported observations. Early superhumps with a period of 0.0539(4) d and an amplitude of 0.07 mag were present.

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