May 2023 - vsnet-chat - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-chat 9406] VSOLJ Variable Star Bulletin No.119
by meineko 23 May '23

23 May '23

No.119 Long-lasting high state of the high-field polar AR UMa T.Kato http://vsolj.cetus-net.org/bulletin.html ------------- Seiichiro Kiyota VSOLJ

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[vsnet-chat 9405] ASASSN-17rf: most likely WZ Sge star with dip + rebrightening
by Taichi Kato 21 May '23

21 May '23

ASASSN-17rf: most likely WZ Sge star with dip + rebrightening From ASAS-SN ver 2 + ATLAS. Deep dip (nearly double outburst), long rebrightening + short ones?

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[vsnet-chat 9404] ASASSN-17qk: most likely WZ Sge star with multiple rebrightenings
by Taichi Kato 21 May '23

21 May '23

ASASSN-17qk: most likely WZ Sge star with multiple rebrightenings From ASAS-SN ver 2 + ATLAS. Five rebrightenings. No outburst since.

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[vsnet-chat 9403] VSOLJ Variable Star Bulletin No.118
by meineko 19 May '23

19 May '23

No. 118 Low state in the post-nova V1315 Aql T. Kato http://vsolj.cetus-net.org/bulletin.html ------------ Seiichiro Kioyota Japan

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[vsnet-chat 9400] Revised version of VSOLJ Variable Star Bulletin NO.115
by meineko 17 May '23

17 May '23

Minor revisions to VSOLJ Variable star bulletin No. 115 are now available at http://vsolj.cetus-net.org/bulletin.html --------------- Seiichiro Kiyota VSOLJ

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[vsnet-chat 9399] SSSJ105639.8-312211 = SSS120514:105640-312212: polar
by Taichi Kato 17 May '23

17 May '23

SSSJ105639.8-312211 = SSS120514:105640-312212: polar Low and high states (ATLAS+ZTF). Faint M_V and red color. High-state ATLAS data gave an orbital period of 0.0764734(4) d (two peaks per period, full amplitude 0.6 mag).

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[vsnet-chat 9398] ASASSN-18eq: IW And star
by Taichi Kato 17 May '23

17 May '23

ASASSN-18eq: IW And star Type from ATLAS data. IW And-type standstill in 2023 Jan.-Mar. (twice) and some more in the past.

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[vsnet-chat 9397] MASTER OT J081110.46+660008.5: multiple rebrightening, short superoutburst interval
by Taichi Kato 15 May '23

15 May '23

MASTER OT J081110.46+660008.5: multiple rebrightening, short superoutburst interval Based on ATLAS, ZTF and ASAS-SN. The 2021 superoutburst was followed by multiple rebrightenings. A new superoutburst was found in 2017 in ATLAS and ASAS-SN. This interval was short for a WZ Sge star with multiple rebrightenings.

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[vsnet-chat 9396] VSOLJ Variable Star Bulletin No.117
by meineko 15 May '23

15 May '23

Mo.117 Double outbursts in V544 Her and ASASSN-19yt T. Kato http://vsolj.cetus-net.org/bulletin.html ---------------- Seiichiro Kiyota VSOLJ

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[vsnet-chat 9395] PS1-3PIJ185013.38+242220.2 = DDE 163: unusual object (double outburst)
by Taichi Kato 15 May '23

15 May '23

PS1-3PIJ185013.38+242220.2 = DDE 163: unusual object (double outburst) Using ATLAS data, I noticed that the bright outburst in 2022 Mar.-Apr. was a double outburst peaking at 13.8 on Mar. 28, fading to mag 17 and 3-d outburst again. The overall feature is inconsistent with the suggested SU UMa-type classification. It resemble that of an AM CVn star but without clear rebrightenings (there was some hint of a fading tail). Other outburst were also unusual. The 2021 Feb. one had two peaks (ZTF+ATLAS) and there were other faint complex-shaped outbursts. There were past ZTF time-series data in quiescence without a particular period.

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