December 2021 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16182] V485 Cen superoutburst
by Taichi Kato 07 Jun '22

07 Jun '22

V485 Cen superoutburst EI Psc-type object. YYYYMMDD(UT) mag observer 20211218.2709 <168C (Masao Funada) 20211225.3367 14.18C (Masao Funada) 20211227.642 144 (Rod Stubbings) 20211228.658 145 (Rod Stubbings) 20211229.658 145 (Rod Stubbings)

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[vsnet-campaign-dn 16183] TCP J07094936+1412280: new WZ Sge-type dwarf nova
by Taichi Kato 30 Dec '21

30 Dec '21

TCP J07094936+1412280: new WZ Sge-type dwarf nova Kiyota-san, Itoh-san and Tonny Vanmunster have reported observations. Kiyota-san's data very clearly showed early superhumps. The period from the combined data is 0.0548(2) d (full amplitude 0.03 mag).

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[vsnet-campaign-dn 16181] ASASSN-21wd superhump period
by Taichi Kato 29 Dec '21

29 Dec '21

ASASSN-21wd superhump period Itoh-san has reported further observations. The superhump period has been established to be 0.06111(8) d.

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[vsnet-campaign-dn 16180] HL CMa standstill
by Taichi Kato 27 Dec '21

27 Dec '21

HL CMa standstill YYYYMMDD(UT) mag observer 20211205.510 126 (Rod Stubbings) 20211206.644 124 (Rod Stubbings) 20211207.517 126 (Rod Stubbings) 20211208.662 126 (Hiroyuki Maehara) 20211210.508 124 (Rod Stubbings) 20211210.5705 12.51C (Masayuki Moriyama) 20211210.6054 123cG (Yutaka Maeda) 20211210.683 125 (Hiroyuki Maehara) 20211211.569 124 (Rod Stubbings) 20211211.587 120 (Tsuneo Horie) 20211212.1672 12.29C (Masao Funada) 20211212.6170 120c (Yutaka Maeda) 20211212.792 122 (Tsuneo Horie) 20211213.594 124 (Hiroyuki Maehara) 20211213.7204 12.44C (Masayuki Moriyama) 20211214.5872 121cG (Yutaka Maeda) 20211214.6548 12.46C (Masayuki Moriyama) 20211214.781 123 (Tsuneo Horie) 20211215.560 124 (Rod Stubbings) 20211215.6028 123C (Masayuki Moriyama) 20211215.6117 125:c (Yutaka Maeda) 20211215.683 124 (Hiroyuki Maehara) 20211215.764 123 (Tsuneo Horie) 20211216.512 124 (Rod Stubbings) 20211217.769 <120 (Tsuneo Horie) 20211218.715 125 (Hiroyuki Maehara) 20211219.642 125 (Hiroyuki Maehara) 20211220.751 <120 (Tsuneo Horie) 20211221.6228 122cG (Yutaka Maeda) 20211221.640 124 (Hiroyuki Maehara) 20211221.6923 12.50C (Masayuki Moriyama) 20211222.480 125 (Rod Stubbings) 20211222.6169 121cG (Yutaka Maeda) 20211223.500 125 (Rod Stubbings) 20211223.687 124 (Hiroyuki Maehara) 20211223.785 <120 (Tsuneo Horie) 20211225.1744 12.42C (Masao Funada) 20211226.523 120 (Tsuneo Horie) 20211227.505 125 (Rod Stubbings)

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[vsnet-campaign-dn 16179] ASASSN-19ct: AM CVn star superoutburst
by Taichi Kato 27 Dec '21

27 Dec '21

ASASSN-19ct: AM CVn star superoutburst YYYYMMDD(UT) mag observer 20211215.617 136 (Rod Stubbings) 20211227.594 148 (Rod Stubbings)

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[vsnet-campaign-dn 16178] ASASSN-21wd: SU UMa-type dwarf nova
by Taichi Kato 21 Dec '21

21 Dec '21

ASASSN-21wd: SU UMa-type dwarf nova Tamas Tordai also reported observations. The superhumps period is 0.05906(3) d or 0.06025(4) d, still allowing other aliases.

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[vsnet-campaign-dn 16177] ASASSN-21wd: likely SU UMa-type dwarf nova
by Taichi Kato 19 Dec '21

19 Dec '21

ASASSN-21wd: likely SU UMa-type dwarf nova Stephen M. Brincat reported observations for two hours. A hump (0.2 mag) was recorded. This object is likely an SU UMa star and further observations are encouraged.

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[vsnet-campaign-dn 16176] SDSS J094325.90+520128.8: new SU UMa-type dwarf nova
by Taichi Kato 18 Dec '21

18 Dec '21

SDSS J094325.90+520128.8: new SU UMa-type dwarf nova Itoh-san has reported observations on five nights. The object shows 0.19-mag superhumps with a period of 0.06765(1) d.

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[vsnet-campaign-dn 16175] DDE 35 superoutburst (since Nov. 24)
by Patrick Schmeer 16 Dec '21

16 Dec '21

DDE 35 (UGSU) Superhump period 0.116 d (above the orbital period gap) https://www.aavso.org/vsx/index.php?view=detail.top&oid=409433 During our ongoing CV monitoring program Patrick Wiggins noticed an outburst of DDE 35 on a CCD image taken on 2021 December 14. According to ATLAS and ASAS-SN Sky Patrol data DDE 35 was already bright on November 24. A precursor outburst was possibly recorded by ATLAS on November 16. https://asas-sn.osu.edu/sky-patrol/coordinate/b75b5ff0-ad77-4e83-b220-5dbbb… https://asas-sn.osu.edu/sky-patrol/coordinate/5c01e639-08a3-4781-ba77-cc5e8… ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF18accnpno/ Gaia Photometric Science Alerts data: http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia16aoy/ Time-resolved photometry during the current outburst is encouraged. Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

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[vsnet-campaign-dn 16174] MASTER OT J030227.28+191754.5: no ordinary superhumps yet?
by 反保雄介 15 Dec '21

15 Dec '21

MASTER OT J030227.28+191754.5: no ordinary superhumps yet? Kyoto U team, Itoh-san, Kiyota-san, Tamas Tordai, Osaka Kyoiku U team, Vihorlat Observatory, Josch Hambsch, and Tonny Vanmunster have reported further observations. Even though more than 2 weeks have passed since the outburst peak, there are no ordinary superhumps yet. Continuous time-resolved observations are encouraged to catch the growing (stage A) superhumps! Best, Yusuke

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vsnet-campaign-dn December 2021