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

[vsnet-alert 27178] Re: DDE 35: more likely a polar
by Taichi Kato 10 Dec '22

10 Dec '22

Re: DDE 35: more likely a polar E. Pavlenko has advised that this object is too blue for a polar. The data by Crimean Astrophys. Obs. team in 2020 showed flickering, but no indication of stable superhumps nor orbital variation. Although a period of 0.20976(3) d was suspected from CrAO observations (by my analysis), this period was not detected in the ZTF data. This object indeed looks like a CV with high/low states, but is certainly neither an SU UMa nor a polar. This object is currently in high state and would be an easy target for spectroscopy to determine the orbital period.

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[vsnet-alert 27177] CRTSJ015051.5+332622 superoutburst continues
by Taichi Kato 09 Dec '22

09 Dec '22

CRTSJ015051.5+332622 superoutburst continues YYYYMMDD(UT) mag observer 20221124.5718 <159c (Yutaka Maeda) 20221126.5644 <161c (Yutaka Maeda) 20221202.5622 150c (Yutaka Maeda) 20221205.5826 145cG (Yutaka Maeda) 20221205.5826 145cG (Yutaka Maeda) 20221207.5577 150:c (Yutaka Maeda)

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[vsnet-alert 27176] MGAB-V279 brightening in standstill?
by Taichi Kato 09 Dec '22

09 Dec '22

MGAB-V279 brightening in standstill? (IW And star) YYYYMMDD(UT) mag observer 20221027.1552 15.902zg (ZTF Alert DC mag (Masci+ 2019)) 20221027.5353 150C (Masayuki Moriyama) 20221029.1246 15.995zg (ZTF Alert DC mag (Masci+ 2019)) 20221102.5423 <168C (Masayuki Moriyama) 20221103.5349 <168C (Masayuki Moriyama) 20221108.5131 150C (Masayuki Moriyama) 20221111.5189 150C (Masayuki Moriyama) 20221115.5229 149C (Masayuki Moriyama) 20221116.5020 <161C (Masayuki Moriyama) 20221119.5073 148C (Masayuki Moriyama) 20221124.4916 <165C (Masayuki Moriyama) 20221207.4238 146C (Masayuki Moriyama)

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[vsnet-alert 27175] AY Psc brightening in standstill?
by Taichi Kato 09 Dec '22

09 Dec '22

AY Psc brightening in standstill? (Eclipsing IW And star) YYYYMMDD(UT) mag observer 20221115.7171 <150c (Yutaka Maeda) 20221117.6890 156C (Masayuki Moriyama) 20221121.610 156C (Mitsutaka Hiraga) 20221123.5674 <152c (Yutaka Maeda) 20221124.5801 <152c (Yutaka Maeda) 20221126.5726 154:c (Yutaka Maeda) 20221202.5706 154:c (Yutaka Maeda) 20221205.5909 152:c (Yutaka Maeda) 20221207.5662 150:c (Yutaka Maeda)

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[vsnet-alert 27174] GL Sge superoutburst
by Taichi Kato 09 Dec '22

09 Dec '22

GL Sge superoutburst YYYYMMDD(UT) mag observer 20221121.5047 <150c (Yutaka Maeda) 20221124.5299 <168C (Masayuki Moriyama) 20221205.4841 161:C (Masayuki Moriyama) 20221207.4348 166:C (Masayuki Moriyama)

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[vsnet-alert 27173] TCPJ05390410+4748030 outburst
by Taichi Kato 09 Dec '22

09 Dec '22

TCPJ05390410+4748030 outburst Last superoutburst (12 mag, WZ Sge star) in 2019 Mar. YYYYMMDD(UT) mag observer 20221202.6045 <163c (Yutaka Maeda) 20221205.6262 <154c (Yutaka Maeda) 20221206.5979 <151c (Yutaka Maeda) 20221207.6004 137c (Yutaka Maeda) 20221207.6004 137c (Yutaka Maeda) Noise? YYYYMMDD(UT) mag observer 20221012.7455 146c (Yutaka Maeda) 20221013.7517 <159c (Yutaka Maeda) 20221014.7306 <155c (Yutaka Maeda) 20221015.7432 <148c (Yutaka Maeda) 20221018.7468 <164c (Yutaka Maeda)

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[vsnet-alert 27172] GZ Cnc superhumps
by Taichi Kato 07 Dec '22

07 Dec '22

GZ Cnc superhumps Vihorlat Observatory team and Itoh-san recorded the superoutburst. The mean superhump period is 0.09368(4) d. The amplitude reached 0.35 mag around the peak.

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[vsnet-alert 27171] Wils_SDSSJ074859.55+312512.6 superoutburst
by Taichi Kato 07 Dec '22

07 Dec '22

Wils_SDSSJ074859.55+312512.6 superoutburst Knwon eclipsing SU UMa star. YYYYMMDD(UT) mag observer 20221121.7604 <158c (Yutaka Maeda) 20221124.7265 <152c (Yutaka Maeda) 20221126.7269 <156c (Yutaka Maeda) 20221202.878 167C (Mitsutaka Hiraga) 20221205.7440 160:c (Yutaka Maeda)

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[vsnet-alert 27170] GL Sge outburst
by Taichi Kato 07 Dec '22

07 Dec '22

GL Sge outburst Knwon SU UMa star. Relatively rare outburst. YYYYMMDD(UT) mag observer 20221115.5012 <150c (Yutaka Maeda) 20221116.5057 <152c (Yutaka Maeda) 20221121.5047 <150c (Yutaka Maeda) 20221124.5299 <168C (Masayuki Moriyama) 20221205.4841 161:C (Masayuki Moriyama)

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[vsnet-alert 27169] CRTSJ015051.5+332622 superoutburst
by Taichi Kato 07 Dec '22

07 Dec '22

CRTSJ015051.5+332622 superoutburst Knwon SU UMa star. YYYYMMDD(UT) mag observer 20221121.1785 18.813zg (ZTF Alert DC mag (Masci+ 2019)) 20221121.2163 18.182zr (ZTF Alert DC mag (Masci+ 2019)) 20221121.7121 <151c (Yutaka Maeda) 20221123.2127 18.274zg (ZTF Alert DC mag (Masci+ 2019)) 20221123.2152 18.270zg (ZTF Alert DC mag (Masci+ 2019)) 20221123.2386 17.961zr (ZTF Alert DC mag (Masci+ 2019)) 20221123.2453 17.746zr (ZTF Alert DC mag (Masci+ 2019)) 20221123.5591 <155c (Yutaka Maeda) 20221124.5718 <159c (Yutaka Maeda) 20221126.5644 <161c (Yutaka Maeda) 20221202.5622 150c (Yutaka Maeda) 20221205.5826 145cG (Yutaka Maeda) 20221205.5826 145cG (Yutaka Maeda)

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vsnet-alert December 2022