December 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9671] ASASSN-22ak: very rapid fading!
by Taichi Kato 29 Dec '22

29 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.

1 0

[vsnet-newvar 9670] ATLAS17mmm likely superoutburst
by Taichi Kato 27 Dec '22

27 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)

1 0

[vsnet-newvar 9669] APA-V1 superoutburst?
by Taichi Kato 27 Dec '22

27 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)

1 0

[vsnet-newvar 9668] CRTSJ091245.9-034916 outburst
by Taichi Kato 27 Dec '22

27 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)

1 0

[vsnet-newvar 9667] SDSSJ074640.62+173412.8 likely superoutburst
by Taichi Kato 26 Dec '22

26 Dec '22

SDSSJ074640.62+173412.8 likely superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221207.7198 <153c (Yutaka Maeda) 20221208.7126 <147c (Yutaka Maeda) 20221209.7395 <148c (Yutaka Maeda) 20221215.6636 <155c (Yutaka Maeda) 20221220.6618 <152c (Yutaka Maeda) 20221225.6450 159:c (Yutaka Maeda)

1 0

[vsnet-newvar 9666] CRTSJ000024.7+332543 likely superoutburst
by Taichi Kato 26 Dec '22

26 Dec '22

CRTSJ000024.7+332543 likely superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221220.5264 <161c (Yutaka Maeda) 20221224.5282 <159c (Yutaka Maeda) 20221225.4947 148cG (Yutaka Maeda) 20221225.4948 148cG (Yutaka Maeda)

1 0

[vsnet-newvar 9665] CRTSJ010522.2+110253 likely superoutburst
by Taichi Kato 25 Dec '22

25 Dec '22

CRTSJ010522.2+110253 likely superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221215.1508 20.125zr (ZTF Alert DC mag (Masci+ 2019)) 20221215.5654 <156c (Yutaka Maeda) 20221220.5633 <154c (Yutaka Maeda) 20221224.5651 144:cG (Yutaka Maeda) 20221224.5651 144:cG (Yutaka Maeda)

1 0

[vsnet-newvar 9664] ASASSN-15sm rapidly faded
by Taichi Kato 25 Dec '22

25 Dec '22

ASASSN-15sm rapidly faded YYYYMMDD(UT) mag observer 20221217.3919 15.280zr (ZTF Alert DC mag (Masci+ 2019)) 20221217.4054 15.041zg (ZTF Alert DC mag (Masci+ 2019)) 20221217.4059 15.063zg (ZTF Alert DC mag (Masci+ 2019)) 20221217.4342 15.260zr (ZTF Alert DC mag (Masci+ 2019)) 20221218.1662 15.36C (Masao Funada) 20221219.858 17.11C (Hiroshi Itoh) 20221220.519 <154 (Rod Stubbings) 20221220.765 17.87C (Hiroshi Itoh) 20221222.576 <161 (Rod Stubbings)

1 0

[vsnet-newvar 9663] CRTSJ160824.0+165240 possible superoutburst
by Taichi Kato 24 Dec '22

24 Dec '22

CRTSJ160824.0+165240 possible superoutburst YYYYMMDD(UT) mag observer 20221223.5538 15.636zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.5563 15.629zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.5588 15.625zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.5613 15.640zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.5638 15.625zr (ZTF Alert DC mag (Masci+ 2019))

1 0

[vsnet-newvar 9662] ATLAS17mmm possible superoutburst
by Taichi Kato 24 Dec '22

24 Dec '22

ATLAS17mmm possible 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))

1 0