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

[vsnet-alert 26668] ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps
by 反保雄介 16 Mar '22

16 Mar '22

ASASSN-22dl: new WZ Sge-type dwarf nova with large-amplitude early superhumps Kyoto Univ. team observed ASASSN-22dl on 16th March. Combining with the data from Itoh-san on 15th, we obtained the double-peaked variation with the period of 0.05259(2) or 0.05555(2) d (alias) and the mean amplitude of 0.5 mag. Judging from its period and phase-averaged profile, I conclude that ASASSN-22dl is a new WZ Sge-type dwarf nova with a large amplitude early superhump. Also, the quiescence data of ZTF showed a possible variation with the period of 0.052673(1) d and with the double-peaked profile. Further observations are encouraged! Best, Yusuke 2022年3月16日(水) 8:55 Taichi Kato <tkato(a)kusastro.kyoto-u.ac.jp>: > ASASSN-22dl: superhump or early superhump? > > Itoh-san detected large variations up to 0.8 mag. > There were two maxima in one cycle and the profile > suggest either an early superhump or superhump + eclipse. > The period was around 0.054 d. Further observations > are encouraged. > -- ---------------------------------------------- Kyoto University, Graduate School of Department of Astronomy, PhD student Yusuke TAMPO MAIL: tampo(a)kusastro.kyoto-u.ac.jp ----------------------------------------------

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[vsnet-alert 26667] ASASSN-22dl: superhump or early superhump?
by Taichi Kato 15 Mar '22

15 Mar '22

ASASSN-22dl: superhump or early superhump? Itoh-san detected large variations up to 0.8 mag. There were two maxima in one cycle and the profile suggest either an early superhump or superhump + eclipse. The period was around 0.054 d. Further observations are encouraged.

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[vsnet-alert 26653] ASASSN-19hd rare outburst
by Taichi Kato 15 Mar '22

15 Mar '22

ASASSN-19hd rare outburst SU UMa star? YYYYMMDD(UT) mag observer 20220305.5545 <170c (Yutaka Maeda) 20220306.5578 <154c (Yutaka Maeda) 20220307.5619 <165c (Yutaka Maeda) 20220308.5617 <162c (Yutaka Maeda) 20220309.5636 <160c (Yutaka Maeda) 20220310.5563 146:c (Yutaka Maeda)

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[vsnet-alert 26654] AB Nor likely superoutburst
by Taichi Kato 14 Mar '22

14 Mar '22

AB Nor likely superoutburst YYYYMMDD(UT) mag observer 20220311.3231 13.69C (Masao Funada)

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[vsnet-alert 26663] BMAM-V547: VY Scl star currently in low state
by Taichi Kato 14 Mar '22

14 Mar '22

BMAM-V547: VY Scl star currently in low state ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/1c81a2ee-0aa0-4a8d-a4c0-b8d07…

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[vsnet-alert 26662] CSS J062450.1+503114: superhump period
by Taichi Kato 13 Mar '22

13 Mar '22

CSS J062450.1+503114: superhump period Itoh-san and Josch Hambsch have reported observations. Well-defined superhumps have been observed and the period has been established to be 0.07768(2) d. The mean amplitude is 0.19 mag.

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[vsnet-alert 26646] GK Per rising
by Taichi Kato 12 Mar '22

12 Mar '22

GK Per rising Maeda-san has pointed out that GK Per is rising. > PERGK 20220309.4908912 125cG Mdy.VSOLJ rising#

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[vsnet-alert 26655] HW Boo faded
by Taichi Kato 12 Mar '22

12 Mar '22

HW Boo faded Itoh-san has reported that the object faded to 17 mag on Mar. 11.

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[vsnet-alert 26652] VZ Sex still bright (IP)
by Taichi Kato 11 Mar '22

11 Mar '22

VZ Sex still bright (IP) YYYYMMDD(UT) mag observer 20220223.5789 158:c (Yutaka Maeda) 20220224.503 <128 (Tsuneo Horie) 20220224.6593 <140c (Yutaka Maeda) 20220224.9472 <143 (Eddy Muyllaert) 20220225.498 <128 (Tsuneo Horie) 20220225.6617 <151c (Yutaka Maeda) 20220225.8979 <143 (Eddy Muyllaert) 20220226.2325 16.100zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220226.499 <128 (Tsuneo Horie) 20220226.6802 155c (Yutaka Maeda) 20220226.8924 <143 (Eddy Muyllaert) 20220227.503 <128 (Tsuneo Horie) 20220227.6687 <157c (Yutaka Maeda) 20220227.8986 <143 (Eddy Muyllaert) 20220228.3234 15.710zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220302.3260 15.555zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220303.503 <128 (Tsuneo Horie) 20220303.6629 141cG (Yutaka Maeda) 20220303.6630 141cG (Yutaka Maeda) 20220303.7014 144C (Masayuki Moriyama) 20220305.496 <128 (Tsuneo Horie) 20220305.6694 136cG (Yutaka Maeda) 20220305.7006 138C (Masayuki Moriyama) 20220305.8840 138 (Eddy Muyllaert) 20220306.487 <128 (Tsuneo Horie) 20220306.6647 13.36C (Masayuki Moriyama) 20220306.6711 130c (Yutaka Maeda) 20220306.6712 130c (Yutaka Maeda) 20220306.8882 129 (Eddy Muyllaert) 20220307.6786 134cG (Yutaka Maeda) 20220307.6786 134cG (Yutaka Maeda) 20220307.8910 135 (Eddy Muyllaert) 20220307.953 13.45C (Gary Poyner) 20220307.9549 13.56C (Masao Funada) 20220308.6780 136cG (Yutaka Maeda) 20220308.6780 136cG (Yutaka Maeda) 20220308.8875 138 (Eddy Muyllaert) 20220309.6474 143C (Masayuki Moriyama) 20220309.6705 142cG (Yutaka Maeda)

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[vsnet-alert 26651] CRTS J094327.3-272039 superoutburst
by Taichi Kato 11 Mar '22

11 Mar '22

CRTS J094327.3-272039 superoutburst YYYYMMDD(UT) mag observer 20211231.7147 <165C (Masayuki Moriyama) 20220210.5993 <164C (Masayuki Moriyama) 20220306.6399 13.66C (Masayuki Moriyama) 20220309.6518 13.92C (Masayuki Moriyama)

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