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

[vsnet-newvar 9116] MASTER OT J021216.01+461154.5 possible superoutburst
by Taichi Kato 18 Mar '22

18 Mar '22

MASTER OT J021216.01+461154.5 possible superoutburst Type from ZTF data. Supercycle about 800 d. YYYYMMDD(UT) mag observer 20220306.4731 <153c (Yutaka Maeda) 20220307.469 <174C (Mitsutaka Hiraga) 20220307.4768 <150c (Yutaka Maeda) 20220308.465 <174C (Mitsutaka Hiraga) 20220308.4765 <155c (Yutaka Maeda) 20220309.4784 <152c (Yutaka Maeda) 20220311.4562 <155c (Yutaka Maeda) 20220312.4537 <154c (Yutaka Maeda) 20220315.4640 139cG (Yutaka Maeda) 20220316.4602 138cG (Yutaka Maeda) 20220316.5197 140:C (Masayuki Moriyama)

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[vsnet-newvar 9115] Re: ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps
by Taichi Kato 17 Mar '22

17 Mar '22

Re: ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps Using the ZTF data, I obtained Min(BJD) = 2458713.27415(12) + 0.05561039(3) d This is a deeply eclipsing WZ Sge-type object whose eclipse minima were below the detection limit of the ZTF observations. Orbital humps before the eclipses were also apparent, suggesting that the mass-transfer rate is not very low. The period of early superhumps (but still from a short baseline) is shorter than the orbital period by 0.13%, typical for a WZ Sge star. Tampo-san and Sebastian, please be careful about in drawing the conclusion. The ZTF data also have one-day aliases.

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[vsnet-newvar 9114] Re: ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps
by Taichi Kato 17 Mar '22

17 Mar '22

Re: ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps I obtained a period of 0.0561(3) d from Kyoto U. data alone (very good data). The combined set with Itoh-san's data yielded a period of 0.05554(2) d. It looks like that the longer period is the true one.

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[vsnet-newvar 9113] ASASSN-22dl: superhump or early superhump?
by Taichi Kato 15 Mar '22

15 Mar '22

ASASSN-22dl: superhump or early superhump? Itoh-san detected large variations up to 0.8 mag. There were two maxima in one cycle and the profile suggest either an early superhump or superhump + eclipse. The period was around 0.054 d. Further observations are encouraged.

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[vsnet-newvar 9101] ASASSN-19hd rare outburst
by Taichi Kato 15 Mar '22

15 Mar '22

ASASSN-19hd rare outburst SU UMa star? YYYYMMDD(UT) mag observer 20220305.5545 <170c (Yutaka Maeda) 20220306.5578 <154c (Yutaka Maeda) 20220307.5619 <165c (Yutaka Maeda) 20220308.5617 <162c (Yutaka Maeda) 20220309.5636 <160c (Yutaka Maeda) 20220310.5563 146:c (Yutaka Maeda)

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[vsnet-newvar 9110] BMAM-V547: VY Scl star currently in low state
by Taichi Kato 14 Mar '22

14 Mar '22

BMAM-V547: VY Scl star currently in low state ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/1c81a2ee-0aa0-4a8d-a4c0-b8d07…

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[vsnet-newvar 9109] BMAM-V625: IW And+E
by Taichi Kato 14 Mar '22

14 Mar '22

BMAM-V625: IW And+E From ZTF data. Heartbeat state in 2018. Long standstill in 2019.

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[vsnet-newvar 9108] BMAM-V546: VY Scl+E
by Taichi Kato 14 Mar '22

14 Mar '22

BMAM-V546: VY Scl+E From ZTF data. Low state in late 2021 fainter than 21 mag.

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[vsnet-newvar 9107] PTF09o: polar
by Taichi Kato 14 Mar '22

14 Mar '22

PTF09gk: polar From ZTF data. Porb=0.0603462(1) d. Single pole. Nearly sinusoidal. Low state in 2018.

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[vsnet-newvar 9106] PTF09gk: polar
by Taichi Kato 14 Mar '22

14 Mar '22

PTF09gk: polar From ZTF data. Porb=0.0603462(1) d. Single pole. Nearly sinusoidal. Low state in 2018.

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