December 2022 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16759] ASASSN-22ak outburst (V3101 Cyg analog?)
by Taichi Kato 21 Dec '22

21 Dec '22

ASASSN-22ak outburst (V3101 Cyg analog?) > The outburst behavior is rather atypical. ASAS-SN light curve: https://asas-sn.osu.edu/sky-patrol/coordinate/69fa9f75-419d-482e-8a8b-0e031… All outbursts look like superoutbursts. The object looked like dormant before the exceptionally bright (13.1 mag) outburst in 202 Jan. Might be an object similar to V3101 Cyg (=TCP J21040470+4631129). ASASSN-22ak have much longer outbursts compared to "rebightening"-type superoutbursts in V3101 Cyg. An AM CVn star would also be a candidate considering the short recurrence time of superoutbursts. Detailed observations are encouraged anyway.

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[vsnet-campaign-dn 16758] ASASSN-22ak outburst
by Taichi Kato 21 Dec '22

21 Dec '22

ASASSN-22ak outburst The outburst behavior is rather atypical. YYYYMMDD(UT) mag observer 20221218.546 162 (Rod Stubbings) 20221219.540 161 (Rod Stubbings) 20221220.574 163 (Rod Stubbings)

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[vsnet-campaign-dn 16757] NSV 2026 superoutburst continues
by Taichi Kato 21 Dec '22

21 Dec '22

NSV 2026 superoutburst continues YYYYMMDD(UT) mag observer 20221211.7326 <169C (Masayuki Moriyama) 20221212.124 <17.30C (Gary Poyner) 20221212.517 <130 (Tsuneo Horie) 20221212.919 17.45C (Gary Poyner) 20221213.878 16.08C (Gary Poyner) 20221214.092 <152 (Gary Poyner) 20221214.580 <130 (Tsuneo Horie) 20221215.051 135 (Gary Poyner) 20221215.057 13.70C (Gary Poyner) 20221215.174 13.52C (Gary Poyner) 20221215.481 <130 (Tsuneo Horie) 20221215.622 136 (Hiroyuki Maehara) 20221215.9027 13.40C (Masao Funada) 20221215.903 13.81C (Gary Poyner) 20221216.028 139 (Gary Poyner) 20221217.103 13.63C (Gary Poyner) 20221217.1035 13.35C (Masao Funada) 20221217.815 138 (Gary Poyner) 20221218.125 13.78C (Gary Poyner) 20221218.474 <130 (Tsuneo Horie) 20221219.087 13.93C (Gary Poyner) 20221219.481 <130 (Tsuneo Horie) 20221219.6883 142C (Masayuki Moriyama) 20221220.103 14.03C (Gary Poyner) 20221220.217 14.05C (Gary Poyner) 20221220.649 142 (Hiroyuki Maehara)

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[vsnet-campaign-dn 16756] QZ Vir outburst
by Taichi Kato 21 Dec '22

21 Dec '22

QZ Vir outburst Faintest outburst ever recorded? YYYYMMDD(UT) mag observer 20221201.155 15.20 (Pavol A. Dubovsky) 20221205.8772 153:c (Yutaka Maeda) 20221207.8275 <147c (Yutaka Maeda) 20221208.8173 <147c (Yutaka Maeda) 20221209.8649 <153c (Yutaka Maeda) 20221220.151 12.455C (Gary Poyner) 20221220.151 12.46C (Gary Poyner) 20221220.167 12.36C (Gary Poyner) 20221220.663 129 (Hiroyuki Maehara)

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[vsnet-campaign-dn 16755] PY Per even brighter
by Taichi Kato 20 Dec '22

20 Dec '22

PY Per even brighter YYYYMMDD(UT) mag observer 20221211.5436 <163c (Yutaka Maeda) 20221212.8611 <141 (Eddy Muyllaert) 20221214.044 <147 (Gary Poyner) 20221215.024 150 (Gary Poyner) 20221215.5773 147cG (Yutaka Maeda) 20221216.8403 <141 (Eddy Muyllaert) 20221217.174 14.56C (Gary Poyner) 20221218.7299 140C (Masayuki Moriyama)

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[vsnet-campaign-dn 16754] MGAB-V298 (AM CVn:) bright outburst
by Taichi Kato 20 Dec '22

20 Dec '22

MGAB-V298 (AM CVn:) bright outburst Likely superoutburst. YYYYMMDD(UT) mag observer 20221120.3517 21.643zr (ZTF Alert DC mag (Masci+ 2019)) 20221121.7591 <171C (Masayuki Moriyama) 20221126.8861 <157C (Masayuki Moriyama) 20221201.3930 21.746zr (ZTF Alert DC mag (Masci+ 2019)) 20221218.7800 165C (Masayuki Moriyama)

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[vsnet-campaign-dn 16753] AQ Eri stopped fading
by Taichi Kato 20 Dec '22

20 Dec '22

AQ Eri stopped fading Suggestion of a precursor? YYYYMMDD(UT) mag observer 20221217.473 150 (Rod Stubbings) 20221218.478 165 (Rod Stubbings) 20221219.475 165 (Rod Stubbings) 20221219.540 <138 (Takuichiro Onishi)

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[vsnet-campaign-dn 16752] V528 Cam outburst
by Taichi Kato 20 Dec '22

20 Dec '22

V528 Cam outburst Known WZ Sge star. Last superoutburst in 2020 Feb. YYYYMMDD(UT) mag observer 20221124.6736 <157c (Yutaka Maeda) 20221126.6738 <157c (Yutaka Maeda) 20221130.0597 <190cG (Masao Funada) 20221215.5934 <161c (Yutaka Maeda) 20221219.0726 15.80C (Masao Funada)

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[vsnet-campaign-dn 16751] ASASSN-15sm outburst
by Taichi Kato 20 Dec '22

20 Dec '22

ASASSN-15sm outburst Known SU UMa star. Relatively rare and possible superoutburst. YYYYMMDD(UT) mag observer 20221218.1662 15.36C (Masao Funada)

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[vsnet-campaign-dn 16750] GK Per somewhat active?
by Taichi Kato 20 Dec '22

20 Dec '22

GK Per somewhat active? As suggested in 2021, the next outburst is already due. YYYYMMDD(UT) mag observer 20221209.6807 127cG (Yutaka Maeda) 20221210.422 131 (Tsuneo Horie) 20221212.431 132 (Tsuneo Horie) 20221212.794 128CV (Klaus Wenzel) 20221212.8014 127 (Eddy Muyllaert) 20221213.413 132 (Tsuneo Horie) 20221214.040 127 (Gary Poyner) 20221214.408 131 (Tsuneo Horie) 20221215.017 127 (Gary Poyner) 20221215.417 132 (Tsuneo Horie) 20221215.5973 124cG (Yutaka Maeda) 20221216.422 131 (Tsuneo Horie) 20221216.574 129 (Takuichiro Onishi) 20221216.712 129 (Klaus Wenzel) 20221216.7625 129 (Eddy Muyllaert) 20221217.0284 12.80cG (Masao Funada) 20221218.391 132 (Tsuneo Horie) 20221218.426 123 (Takuichiro Onishi) 20221218.7374 126C (Masayuki Moriyama) 20221219.389 128 (Tsuneo Horie)

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vsnet-campaign-dn December 2022