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

[vsnet-alert 27251] FT Cam bright outburst
by Taichi Kato 26 Dec '22

26 Dec '22

FT Cam bright outburst Object below the period gap. Not yet seen in superoutburst. YYYYMMDD(UT) mag observer 20221220.585 174C (Mitsutaka Hiraga) 20221220.5923 <153c (Yutaka Maeda) 20221220.6760 <146cG (Yutaka Maeda) 20221220.817 <152 (Gary Poyner) 20221221.2904 17.689zr (ZTF Alert DC mag (Masci+ 2019)) 20221223.891 <152 (Gary Poyner) 20221224.5943 157:c (Yutaka Maeda) 20221225.6951 137cG (Yutaka Maeda) 20221225.6952 137cG (Yutaka Maeda)

1 0

[vsnet-alert 27250] 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-alert 27249] 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-alert 27248] Re: EF Eri profile
by Taichi Kato 25 Dec '22

25 Dec '22

Re: EF Eri profile Berto Monard has provided observations on 2006 Mar. 11 (one of high states in the 2000s). The orbital profile was similar to the current one (two maxima per period). It was not always the case in the past. See e.g.: https://ui.adsabs.harvard.edu/abs/1987A%26A...181L..15L/abstract

1 0

[vsnet-alert 27247] GK Per further brightening
by Taichi Kato 24 Dec '22

24 Dec '22

GK Per further brightening YYYYMMDD(UT) mag observer 20221212.431 132 (Tsuneo Horie) 20221212.794 128CV (Klaus Wenzel) 20221212.8014 127 (Eddy Muyllaert) 20221213.413 132 (Tsuneo Horie) 20221214.040 127 (Gary Poyner) 20221214.408 131 (Tsuneo Horie) 20221215.017 127 (Gary Poyner) 20221215.417 132 (Tsuneo Horie) 20221215.5973 124cG (Yutaka Maeda) 20221216.422 131 (Tsuneo Horie) 20221216.574 129 (Takuichiro Onishi) 20221216.712 129 (Klaus Wenzel) 20221216.7625 129 (Eddy Muyllaert) 20221217.0284 12.80cG (Masao Funada) 20221217.781 130 (Gary Poyner) 20221218.391 132 (Tsuneo Horie) 20221218.426 123 (Takuichiro Onishi) 20221218.7374 126C (Masayuki Moriyama) 20221219.389 128 (Tsuneo Horie) 20221219.7910 125 (Eddy Muyllaert) 20221220.398 127 (Tsuneo Horie) 20221220.5949 119cG (Yutaka Maeda) 20221220.653 125 (Takuichiro Onishi) 20221220.6605 122C (Masayuki Moriyama) 20221220.806 121 (Gary Poyner) 20221221.194 11.93C (Gary Poyner) 20221221.1962 12.01C (Masao Funada) 20221221.808 119 (Gary Poyner) 20221221.856 11.84C (Gary Poyner) 20221221.8559 11.77C (Masao Funada) 20221222.408 120 (Tsuneo Horie) 20221222.810 11.91C (Gary Poyner) 20221222.8109 11.83C (Masao Funada) 20221223.397 120 (Tsuneo Horie) 20221223.542 120 (Takuichiro Onishi) 20221223.7736 119 (Eddy Muyllaert) 20221223.894 12.03C (Gary Poyner) 20221223.8941 11.81C (Masao Funada) 20221224.5967 114cG (Yutaka Maeda)

1 0

[vsnet-alert 27246] AY Lac superpoutburst, more data
by Taichi Kato 24 Dec '22

24 Dec '22

AY Lac superpoutburst, more data YYYYMMDD(UT) mag observer 20221211.4558 <159c (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)

1 0

[vsnet-alert 27245] 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-alert 27244] 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

[vsnet-alert 27243] ASASSN-22ak period?
by Taichi Kato 24 Dec '22

24 Dec '22

ASASSN-22ak period? Josch Hambsch has reported observations on three nights. Although the amplitude was an order of 0.1 mag with limited statistics, a period of either 0.0412 d or double one (allowing aliases) is suggested. Considering the unusual outburst properties, further observations are strongly needed.

1 0

[vsnet-alert 27242] EF Eri profile
by Taichi Kato 24 Dec '22

24 Dec '22

EF Eri profile Kyoto U. team, Kiyota-san, Itoh-san, Peter Starr and Josch Hambsch have reported observation. The object shows very clear two peaks (full amplitude 0.7 mag) in one orbital period. The period 0.056269(3) d is in very good agreement with the published one. There is also a dip (somewhat variable), which may be an eclipse of/by the accretion column.

1 0