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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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[vsnet-chat 9366] ASASSN-19bl: most likely AM CVn
by Taichi Kato 30 Mar '23

30 Mar '23

ASASSN-19bl: most likely AM CVn ATLAS+ZTF. Multiple rebrightenings on fading tail. Superoutbursts in 2019 Jan.-Feb. and 2022 Nov.

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[vsnet-chat 9365] ASASSN-13bs: not (yet) SU UMa star?
by Taichi Kato 30 Mar '23

30 Mar '23

ASASSN-13bs: not (yet) SU UMa star? On two occasions (2018 Aug. and 2021 Apr.) when T. Vanmunster reported superhumps, the corresponding outbursts have been confirmed to be short (ATLAS/ZTF). They were unlikely true superoutbursts. I changed UGSU to UG. No long outbursts have been recorded in these data.

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[vsnet-chat 9364] ASASSN-VJ065237.19+243622.3: IW And star, similar to BO Cet?
by Taichi Kato 29 Mar '23

29 Mar '23

ASASSN-VJ065237.19+243622.3: IW And star, similar to BO Cet? ATLAS+ASAS-SNL+ATLAS data. IW And state in 2016-2019. In 2021 Oct. - 2022 Apr., standstill - brightening - fading - cycles of outbursts - long, bright outburst in 2022 Apr. similar to BO Cet. Although the data were not sufficient, this outburst may have been a superoutburst. The object is bright (15-16 mag) and observations are encouraged.

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[vsnet-chat 9363] ASASSN-VJ154918.88-373558.2: IW And star
by Taichi Kato 28 Mar '23

28 Mar '23

ASASSN-VJ154918.88-373558.2: IW And star From ATLAS data. Typical IW And behavior.

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[vsnet-chat 9362] ASASSN-VJ125507.89-504220.4: IW And star
by Taichi Kato 28 Mar '23

28 Mar '23

ASASSN-VJ125507.89-504220.4: IW And star From ATLAS data. Typical IW And behavior. Now in standstill.

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[vsnet-chat 9361] ASASSN-VJ053944.97-172403.4: polar
by Taichi Kato 28 Mar '23

28 Mar '23

ASASSN-VJ053944.97-172403.4: polar From ATLAS data. High and low states. Porb=0.0842099 d (two peaks per orbit; amplitude 1.2 mag).

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[vsnet-chat 9360] ASASSN-VJ051300.04-252323.1: polar
by Taichi Kato 28 Mar '23

28 Mar '23

ASASSN-VJ051300.04-252323.1: polar From ATLAS data. High and low states. Porb=0.0693660 d (single peak per orbit).

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