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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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[vsnet-chat 9394] Gaia17aoz: unusual dwarf nova with multiple rebrightenings
by Taichi Kato 14 May '23

14 May '23

Gaia17aoz: unusual dwarf nova with multiple rebrightenings Based on ATLAS and ZTF. Superoutbursts with multiple rebrightenings in 2019-2020 and 2022 (this one was very clear). Rebrightenings longer than in AM CVn stars. The interval less than 3 yr is exceptionally short for a WZ Sge star with multiple rebrightenings.

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[vsnet-chat 9393] ASASSN-18in 2018 outburst
by Taichi Kato 11 May '23

11 May '23

ASASSN-18in 2018 outburst A dwarf-nova outburst was clearly present. The true counterpart a background fainter object? YYYYMMDD(UT) mag observer 20180330.3871 17.537o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180330.4045 17.551o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180330.4064 17.581o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180330.4087 17.272o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180415.4528 15.988o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180415.4594 16.041o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180415.4613 16.026o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180417.4414 16.302c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180417.4503 16.271c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180417.4516 16.322c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180417.4555 16.262c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180417.4647 16.225c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180417.4661 16.314c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180421.4381 16.722o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180421.4462 16.835o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180421.4540 16.732o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180425.4266 16.835o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180425.4325 16.892o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180425.4384 16.950o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180425.4494 16.934o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180507.4019 17.230o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180507.4125 17.233o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180507.4143 17.279o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180507.4262 17.243o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180509.3950 17.361o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180509.3964 17.424o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180509.4080 17.435o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180509.4203 17.404o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180512.4031 17.814c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180512.4099 17.865c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180512.4122 17.803c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180512.4159 17.774c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180513.3678 17.550o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180513.3759 17.554o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180513.3845 17.514o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20180513.3921 17.606o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-chat 9392] VSOLJ Variable Star Bulletin No.116
by meineko 05 May '23

05 May '23

No.116 The 2022 active state of the AM CVn star NSV 1440 Taichi Kato,　Rod Stubbings http://vsolj.cetus-net.org/bulletin.html Seiichiro Kiyota VSOJ

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