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

[vsnet-alert 27199] SDSSJ091935.66+502825.2 fading
by Taichi Kato 16 Dec '22

16 Dec '22

SDSSJ091935.66+502825.2 fading Tonny Vanmunster and Itoh-san have reported observations. There were no clear superhumps and the object was likely fading rather rapidly.

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[vsnet-alert 27198] SDSSJ091935.66+502825.2 outburst
by Taichi Kato 15 Dec '22

15 Dec '22

SDSSJ091935.66+502825.2 outburst This is a suspected SU UMa star. YYYYMMDD(UT) mag observer 20221120.756 <177C (Mitsutaka Hiraga) 20221202.865 <174C (Mitsutaka Hiraga) 20221213.917 146C (Jeremy Shears)

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[vsnet-alert 27197] U Gem: preoutburst brightening?
by Taichi Kato 14 Dec '22

14 Dec '22

U Gem: preoutburst brightening? Preoutburst brightening had been suggested. YYYYMMDD(UT) mag observer 20221123.783 136 (Tsuneo Horie) 20221124.7293 135cG (Yutaka Maeda) 20221126.617 <131 (Tsuneo Horie) 20221126.628 <139 (Takuichiro Onishi) 20221126.719 138 (Hiroyuki Maehara) 20221126.7296 133cG (Yutaka Maeda) 20221126.8938 133C (Masayuki Moriyama) 20221127.8938 139C (Masayuki Moriyama) 20221128.085 13.66C (Gary Poyner) 20221128.0862 13.58C (Masao Funada) 20221129.012 13.70 (Pavol A. Dubovsky) 20221129.944 14.03 (Pavol A. Dubovsky) 20221201.115 14.00 (Pavol A. Dubovsky) 20221201.665 135 (Takuichiro Onishi) 20221202.625 <131 (Takuichiro Onishi) 20221202.8751 137C (Masayuki Moriyama) 20221203.556 <131 (Takuichiro Onishi) 20221203.805 135 (Tsuneo Horie) 20221205.7475 132cG (Yutaka Maeda) 20221207.585 <109 (Hiroyuki Someya) 20221207.7173 138:cG (Yutaka Maeda) 20221207.791 <131 (Tsuneo Horie) 20221208.616 <120 (Takuichiro Onishi) 20221208.7100 144:c (Yutaka Maeda) 20221209.569 <120 (Takuichiro Onishi) 20221209.7363 140cG (Yutaka Maeda) 20221212.8854 94 (Eddy Muyllaert) 20221213.781 95 (Tsuneo Horie)

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[vsnet-alert 27196] GZ Cet faint superoutburst
by Taichi Kato 14 Dec '22

14 Dec '22

GZ Cet faint superoutburst Kiyota-san detected one superhump. YYYYMMDD(UT) mag observer 20221206.4696 <146c (Yutaka Maeda) 20221207.4709 <141c (Yutaka Maeda) 20221208.4656 <149c (Yutaka Maeda) 20221209.4865 139:cG (Yutaka Maeda) 20221209.4865 139:cG (Yutaka Maeda) 20221211.985 14.34C (Gary Poyner) 20221211.9864 14.16C (Masao Funada)

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[vsnet-alert 27195] ASASSN-20na
by Taichi Kato 13 Dec '22

13 Dec '22

ASASSN-20na Tonny Vanmunster reported observations on Dec. 11. The object varied between 17.2 and 17.5. There was some possible indication of superhumps, but the result was not conclusive. The object had already faded much and it was likely superhumps had already become irregular.

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[vsnet-alert 27194] MGAB-V252 likely superoutburst continues
by Taichi Kato 12 Dec '22

12 Dec '22

MGAB-V252 likely superoutburst continues YYYYMMDD(UT) mag observer 20221115.5715 <162C (Masayuki Moriyama) 20221119.1374 20.136zr (ZTF Alert DC mag (Masci+ 2019)) 20221119.5840 <166C (Masayuki Moriyama) 20221121.5734 <155C (Masayuki Moriyama) 20221124.5602 <162C (Masayuki Moriyama) 20221126.5596 <162C (Masayuki Moriyama) 20221130.1365 15.560zr (ZTF Alert DC mag (Masci+ 2019)) 20221205.5195 160:C (Masayuki Moriyama) 20221209.1103 16.242zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27193] ASASSN-20na likely superoutburst, more data
by Taichi Kato 12 Dec '22

12 Dec '22

ASASSN-20na likely superoutburst, more data YYYYMMDD(UT) mag observer 20221117.517 <174C (Mitsutaka Hiraga) 20221130.1169 15.853zg (ZTF Alert DC mag (Masci+ 2019)) 20221130.1428 15.887zr (ZTF Alert DC mag (Masci+ 2019)) 20221209.1981 17.013zr (ZTF Alert DC mag (Masci+ 2019)) 20221209.2353 17.040zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27192] ASASSN-19ve likely superoutburst
by Taichi Kato 12 Dec '22

12 Dec '22

ASASSN-19ve likely superoutburst Tupe from ZTF data. YYYYMMDD(UT) mag observer 20221209.1081 16.969zr (ZTF Alert DC mag (Masci+ 2019)) 20221209.1658 16.882zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27191] Re: DDE 35: more likely a polar
by Taichi Kato 11 Dec '22

11 Dec '22

Re: DDE 35: more likely a polar > According to GAIA data, this object underwent high states > before 2018 several times. > https://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia16aoy/ Could rather be an active VY Scl star, like KR Aur dominated by low states. DDE 35 is currently still brightening.

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[vsnet-alert 27190] GQ CVn outburst
by Taichi Kato 11 Dec '22

11 Dec '22

GQ CVn outburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221205.8966 <141c (Yutaka Maeda) 20221207.8465 <153c (Yutaka Maeda) 20221208.8365 <154c (Yutaka Maeda) 20221209.8841 155:c (Yutaka Maeda) 20221209.8841 155:c (Yutaka Maeda)

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vsnet-alert December 2022