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

[vsnet-alert 27263] MASTER OT J054111.82+454054.9 rare? outburst
by Taichi Kato 02 Jan '23

02 Jan '23

MASTER OT J054111.82+454054.9 rare? outburst Only one outburst detection in the ZTF data. YYYYMMDD(UT) mag observer 20221225.5741 <154c (Yutaka Maeda) 20221227.6662 <175C (Masayuki Moriyama) 20221227.7269 <148c (Yutaka Maeda) 20221231.8153 159:C (Masayuki Moriyama)

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[vsnet-alert 27262] CRTSJ000024.7+332543 superhumps
by Taichi Kato 02 Jan '23

02 Jan '23

CRTSJ000024.7+332543 superhumps Itoh-san confirmed superhumps on the second night. There was no hint of an eclipse.

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[vsnet-alert 27261] CRTSJ000024.7+332543: superhump and eclipse?
by Taichi Kato 01 Jan '23

01 Jan '23

CRTSJ000024.7+332543: superhump and eclipse? Itoh-san reported observations and detected a 0.3-mag superhump. There was an eclipse-like episode which needs to be confirmed.

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[vsnet-alert 27260] AY Lac rapidly faded
by Taichi Kato 30 Dec '22

30 Dec '22

AY Lac rapidly faded YYYYMMDD(UT) mag observer 20221220.5363 <139cG (Yutaka Maeda) 20221222.1777 16.273zg (ZTF Alert DC mag (Masci+ 2019)) 20221222.2272 16.306zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.797 163C (Jeremy Shears) 20221224.857 17.21C (Gary Poyner) 20221225.413 18.27C (Hiroshi Itoh) 20221225.4545 <146c (Yutaka Maeda) 20221225.5029 <141cG (Yutaka Maeda) 20221225.5580 <173C (Masayuki Moriyama) 20221226.5805 <167C (Masayuki Moriyama)

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[vsnet-alert 27259] WX Hyi superoutburst
by Taichi Kato 30 Dec '22

30 Dec '22

WX Hyi superoutburst YYYYMMDD(UT) mag observer 20221222.596 147 (Rod Stubbings) 20221224.619 157 (Rod Stubbings) 20221225.582 155 (Rod Stubbings) 20221226.569 147 (Rod Stubbings) 20221227.578 123 (Rod Stubbings) 20221229.603 116 (Rod Stubbings)

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[vsnet-alert 27258] ASASSN-22ak: very rapid fading!
by Taichi Kato 30 Dec '22

30 Dec '22

ASASSN-22ak: very rapid fading! Josch Hambsch has reported further observations. Although no definite superhump signal has been detected, the object suddenly faded by 1.8 mag on Dec. 29 (probably more than 2 mag/d since there was no hint of fading during Dec. 28 observations). This fading supports my second interpretation as an AM CVn star. The object is still expected to be detectable and please continue observations.

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[vsnet-alert 27257] ATLAS17mmm likely superoutburst
by Taichi Kato 28 Dec '22

28 Dec '22

ATLAS17mmm likely superoutburst YYYYMMDD(UT) mag observer 20221221.2523 16.262zg (ZTF Alert DC mag (Masci+ 2019)) 20221221.2940 16.548zr (ZTF Alert DC mag (Masci+ 2019)) 20221226.6417 16.79C (Masayuki Moriyama)

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[vsnet-alert 27256] APA-V1 superoutburst?
by Taichi Kato 28 Dec '22

28 Dec '22

APA-V1 superoutburst? Suspected SU UMa star. Last likely superoutburst in 2020 July (ZTF data). YYYYMMDD(UT) mag observer 20221126.5886 <165C (Masayuki Moriyama) 20221205.5022 <168C (Masayuki Moriyama) 20221226.5015 16.17C (Masayuki Moriyama)

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[vsnet-alert 27255] CRTSJ091245.9-034916 outburst
by Taichi Kato 28 Dec '22

28 Dec '22

CRTSJ091245.9-034916 outburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221205.8328 <153c (Yutaka Maeda) 20221207.7902 <146c (Yutaka Maeda) 20221208.7800 <151c (Yutaka Maeda) 20221209.4243 17.785zg (ZTF Alert DC mag (Masci+ 2019)) 20221209.8217 <157c (Yutaka Maeda) 20221211.8374 <162C (Masayuki Moriyama) 20221215.4745 17.199zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.4359 15.615zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.4440 15.442zg (ZTF Alert DC mag (Masci+ 2019)) 20221225.7562 <146c (Yutaka Maeda) 20221225.8270 157C (Masayuki Moriyama)

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[vsnet-alert 27254] EF Eri: dips
by Taichi Kato 27 Dec '22

27 Dec '22

EF Eri: dips Observations by Kiyota-san and Itoh-san clearly shows short-duration dips such as at 2022 Dec. 25.618 (UT). These dips were not seen in every orbit but were present almost on every night. The durations were 2-3 min and were 0.8-mag deep. Ingress was slower and egress was sometimes sudden (within 30s).

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