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[vsnet-chat 9376] ZTF18aczazlw: AM CVn star with multiple rebrightenings?
by Taichi Kato 25 Apr '23

25 Apr '23

ZTF18aczazlw: AM CVn star with multiple rebrightenings? From ZTF data. Supercycle about a year and with multiple rebrightenings.

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[vsnet-chat 9375] ZTF18abmaqsj orbital period
by Taichi Kato 24 Apr '23

24 Apr '23

ZTF18abmaqsj orbital period From ZTF data. Porb=0.2397762(8) d. Sinusoidal variation and orbital amplitude 0.5 mag (too large for NL and no indication of eclipse). Resembles a reflection-type variable but with other variations.

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[vsnet-chat 9374] ZTF18aaxpgxp: deeply eclipsing polar
by Taichi Kato 24 Apr '23

24 Apr '23

ZTF18aaxpgxp: deeply eclipsing polar From ZTF data. Porb=0.0642228(1) d. Eclipse 1.7 mag. Two maxima per cycle.

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[vsnet-chat 9373] SDSS J094002.56+274942.0: another long-Porb SU UMa star
by Taichi Kato 20 Apr '23

20 Apr '23

SDSS J094002.56+274942.0: another long-Porb SU UMa star ZTF time-resolved data recorded superhumps during the 2019 Feb. outburst. T. Vanmunster's observation also detected 0.3-mag superhump(s) on 2019 Feb. 11. Probably due to the long Porb=0.16352 d, this variation was not regarded as superhump(s). The 2009 outburst (Krajci and Wils JAAVSO 38, 33) was a normal one. The secondary is probably somewhat evolved as reported as a possible spectral class early M-type in Krajci and Wils (2010).

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[vsnet-chat 9372] Gaia23bno: most likely polar
by Taichi Kato 20 Apr '23

20 Apr '23

Gaia23bno: most likely polar ZTF time-resolved data (two nights) recorded large-amplitude (1.5 mag) modulations whose profile is consistent with a polar.

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[vsnet-chat 9371] Gaia23bol = NSV21928 (TerzV2223)
by Taichi Kato 19 Apr '23

19 Apr '23

Gaia23bol = NSV21928 (TerzV2223) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23bol/ Indeed eclipsing.

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[vsnet-chat 9370] VSOLJ variable star bulletin no.113
by meineko 16 Apr '23

16 Apr '23

No.113 2023 Apr. PDF MASTER OT J055845.55+391533.4: SU UMa star with a dip and long rebrightening Taichi Kato, Hiroshi Itoh, Tonny Vanmunster, Seiichiro Kiyota, Katsuaki Kubodera,Pavol A. Dubovsky, Igor Kudzej, Tomáš Medulka, Filipp D. Romanov and David J. Lane http://vsolj.cetus-net.org/bulletin.html Seiichiro Kiyota Japan

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[vsnet-chat 9369] VSOLJ bulletin No.112
by meineko 11 Apr '23

11 Apr '23

No.112 2023 Apr. CM Mic and other ER UMa stars showing standstills Taichi Kato and Naoto Kojiguchi http://vsolj.cetus-net.org/bulletin.html Seiichiro Kiyota VSOLJ

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[vsnet-chat 9368] ASASSN-19adf: SU UMa star
by Taichi Kato 01 Apr '23

01 Apr '23

ASASSN-19adf: SU UMa star ZTF time-resolved data recorded superhumps during the 2019 superoutburst. Superhump period = 0.05556(5) d (stage B). Tamas Tordai also reported single-night data which are consistent with this period.

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[vsnet-chat 9367] ASASSN-19lb: IW And star
by Taichi Kato 31 Mar '23

31 Mar '23

ASASSN-19lb: IW And star From ATLAS data. IW And state in 2023. Currently in standstill? following oscillation state.

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