March 2023 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9892] TCPJ06461075+2502415: starting to show superhumps?
by Taichi Kato 23 Mar '23

23 Mar '23

TCPJ06461075+2502415: starting to show superhumps? The most recent data by Itoh-san (Mar. 22) showed brightening and a possible sign of emerging superhumps. Ordinary superhumps appear to be emerging now.

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[vsnet-newvar 9894] ASASSN-VJ121700.06-660358.5: IW And star?
by Taichi Kato 23 Mar '23

23 Mar '23

ASASSN-VJ121700.06-660358.5: IW And star? ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) data. IW And-like variation with deep fading (currently).

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[vsnet-newvar 9893] ASASSN-VJ151959.64-354419.4: low amplitude SU UMa or Z Cam?
by Taichi Kato 23 Mar '23

23 Mar '23

ASASSN-VJ151959.64-354419.4: low amplitude SU UMa or Z Cam? ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) data. Relatively regular long outbursts but otherwise much irregularities. Deserves monitoring (bright at 14.5-15.0 at maximum).

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[vsnet-newvar 9891] ASASSN-VJ212913.17+255933.8: IW And star
by Taichi Kato 23 Mar '23

23 Mar '23

ASASSN-VJ212913.17+255933.8: IW And star ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) data. Typical IW And-type standstills in 2017, 2019 and 2020.

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[vsnet-newvar 9890] ASASSN-VJ164913.32-694853.0: IW And star
by Taichi Kato 22 Mar '23

22 Mar '23

ASASSN-VJ164913.32-694853.0: IW And star ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) data. 2022: typical IW And variation 2023: heartbeat state

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[vsnet-newvar 9889] PGIR22akgylf peak magnitude
by Taichi Kato 21 Mar '23

21 Mar '23

PGIR22akgylf peak magnitude https://www.aavso.org/vsx/index.php?view=detail.top&oid=2344400 YYYYMMDD(UT) mag observer 20221228.3505 13.35V (Seiichiro Kiyota) 20221228.4609 13.20V (Masayuki Moriyama)

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[vsnet-newvar 9888] MGAB-V320 likely superoutburst
by Taichi Kato 21 Mar '23

21 Mar '23

MGAB-V320 likely superoutburst (Frequent superoutbursts in ZTF data) YYYYMMDD(UT) mag observer 20230319.2576 15.47cG (Masao Funada)

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[vsnet-newvar 9887] ASASSN-23bl: new SU UMa-type dwarf nova (now faded)
by Taichi Kato 20 Mar '23

20 Mar '23

ASASSN-23bl: new SU UMa-type dwarf nova (now faded) Josch Hambsch has reported observations (and some from Itoh-san). The object faded to 19.5 on Mar. 18. The light curve suggests that the superoutburst plateau stage B-C was likely observed (when superhump amplitude becomes small). A PDM analysis of the superoutburst plateau yielded the most likely period of 0.06348(5) d and an amplitude of 0.07 mag (Due to the low sampling rate, the waveform became apparent only after the period analysis). The object is likely a WZ Sge star based on the amplitude. The period may suggest multiple rebrightenings if it is the case.

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[vsnet-newvar 9886] MASTER OT J051529.15+560532.0 superoutburst
by Taichi Kato 20 Mar '23

20 Mar '23

MASTER OT J051529.15+560532.0 superoutburst YYYYMMDD(UT) mag observer 20230313.500 <178C (Mitsutaka Hiraga) 20230313.5395 <159c (Yutaka Maeda) 20230314.5100 <164c (Yutaka Maeda) 20230314.6089 170C (Masayuki Moriyama) 20230315.5258 <159c (Yutaka Maeda) 20230316.5502 132c (Yutaka Maeda) 20230316.5502 132c (Yutaka Maeda) 20230318.6351 138C (Masayuki Moriyama)

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[vsnet-newvar 9885] ASASSN-23bn superhump period
by Taichi Kato 19 Mar '23

19 Mar '23

ASASSN-23bn superhump period Using Peter Starr's new data, the superhump period (stages A+B combined) is determined to be 0.05977(2) d.

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