- vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27228] MGAB-V311 likely superoutburst
by Taichi Kato 22 Dec '22

22 Dec '22

MGAB-V311 likely superoutburst Type from ZTF data. Short supercycle. YYYYMMDD(UT) mag observer 20221215.2865 16.925zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27227] CRTSJ050716.2+125314 possible superoutburst
by Taichi Kato 22 Dec '22

22 Dec '22

CRTSJ050716.2+125314 possible superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221215.3215 16.784zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27226] GK Per outburst
by Taichi Kato 21 Dec '22

21 Dec '22

GK Per outburst Maeda-san reported 11.9C on Dec. 20. > PERGK 20221220.594919 119cG Mdy.VSOLJ outburst

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[vsnet-alert 27225] Re: ASASSN-22ak outburst (V3101 Cyg analog?)
by Taichi Kato 21 Dec '22

21 Dec '22

Re: ASASSN-22ak outburst (V3101 Cyg analog?) Berto Monard had reported single-night observation on 2022 Jan. 18, during the first superoutburst at mag slightly below 15. There was some hint of modulations with a period of 0.044 d, but this is not reliable due to the shortness of the run. Observations are encouraged while this object is still in outburst.

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[vsnet-alert 27224] 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. … [View More]

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[vsnet-alert 27223] 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-alert 27222] V425 Cas slightly low state continues
by Taichi Kato 21 Dec '22

21 Dec '22

V425 Cas slightly low state continues YYYYMMDD(UT) mag observer 20221025.2360 15.005zg (ZTF Alert DC mag (Masci+ 2019)) 20221025.3422 15.211zr (ZTF Alert DC mag (Masci+ 2019)) 20221025.5939 152:cG (Yutaka Maeda) 20221027.2891 15.694zr (ZTF Alert DC mag (Masci+ 2019)) 20221027.3089 15.848zg (ZTF Alert DC mag (Masci+ 2019)) 20221027.5885 153c (Yutaka Maeda) 20221028.5991 149:cG (Yutaka Maeda) 20221029.2455 15.224zr (ZTF Alert DC mag (Masci+ 2019)) 20221029.3285 15.… [View More]586zg (ZTF Alert DC mag (Masci+ 2019)) 20221030.5891 148:cG (Yutaka Maeda) 20221102.6255 <147c (Yutaka Maeda) 20221103.5958 154:c (Yutaka Maeda) 20221104.6281 150:cG (Yutaka Maeda) 20221105.2279 14.708zg (ZTF Alert DC mag (Masci+ 2019)) 20221105.2878 15.162zr (ZTF Alert DC mag (Masci+ 2019)) 20221105.6236 151:c (Yutaka Maeda) 20221107.6267 148:c (Yutaka Maeda) 20221108.5655 149:c (Yutaka Maeda) 20221111.1386 15.657zr (ZTF Alert DC mag (Masci+ 2019)) 20221111.6967 153C (Masayuki Moriyama) 20221112.5616 15.56C (Seiichiro Kiyota) 20221112.5675 15.25V (Seiichiro Kiyota) 20221113.1431 15.331zr (ZTF Alert DC mag (Masci+ 2019)) 20221113.1840 15.483zg (ZTF Alert DC mag (Masci+ 2019)) 20221115.2074 15.717zg (ZTF Alert DC mag (Masci+ 2019)) 20221115.2591 15.647zr (ZTF Alert DC mag (Masci+ 2019)) 20221115.6226 153C (Masayuki Moriyama) 20221119.1624 15.714zr (ZTF Alert DC mag (Masci+ 2019)) 20221119.2826 15.446zg (ZTF Alert DC mag (Masci+ 2019)) 20221119.5533 15.67C (Seiichiro Kiyota) 20221119.5578 15.59V (Seiichiro Kiyota) 20221119.6926 154C (Masayuki Moriyama) 20221121.1618 15.790zg (ZTF Alert DC mag (Masci+ 2019)) 20221121.4704 15.47C (Seiichiro Kiyota) 20221121.5892 <157c (Yutaka Maeda) 20221123.1558 15.505zr (ZTF Alert DC mag (Masci+ 2019)) 20221123.1803 15.567zg (ZTF Alert DC mag (Masci+ 2019)) 20221123.5016 154:cG (Yutaka Maeda) 20221124.5144 151:c (Yutaka Maeda) 20221125.4717 15.32C (Seiichiro Kiyota) 20221126.5067 152c (Yutaka Maeda) 20221130.1188 15.770zg (ZTF Alert DC mag (Masci+ 2019)) 20221130.1621 16.010zr (ZTF Alert DC mag (Masci+ 2019)) 20221202.5047 145:cG (Yutaka Maeda) 20221206.4984 <150c (Yutaka Maeda) 20221207.5000 150:c (Yutaka Maeda) 20221208.4945 <155c (Yutaka Maeda) 20221209.1780 15.707zr (ZTF Alert DC mag (Masci+ 2019)) 20221209.2269 15.703zg (ZTF Alert DC mag (Masci+ 2019)) 20221209.5151 148:cG (Yutaka Maeda) 20221211.1826 15.600zr (ZTF Alert DC mag (Masci+ 2019)) 20221211.4663 <155c (Yutaka Maeda) 20221215.4999 149:cG (Yutaka Maeda) 20221215.6394 154C (Masayuki Moriyama) 20221218.6507 155C (Masayuki Moriyama) [View Less]

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[vsnet-alert 27221] 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) … [View More]

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[vsnet-alert 27220] 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-alert 27219] EF Eri short-term variations
by Taichi Kato 21 Dec '22

21 Dec '22

EF Eri short-term variations Kyoto U. team obtained high time-resolution observations. The object showed QPO-like variations with time scales of about 5 min. They could arise from instabilities in the accretion column. Itoh-san and Kiyota-san also reported observations showing large modulations.

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