December 2021 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26448] ASASSN-13cx outburst
by 前田豊 26 Jul '22

26 Jul '22

UGSU+E ASASSN-13cx outburst. ASASSN-13cx 20211118.57382 151:c Mdy.VSOLJ MAEDA Yutaka Nagasaki Japan

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[vsnet-alert 26496] 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-alert 26497] 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-alert 26495] 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-alert 26492] TCP J07094936+1412280
by Naoto Kojiguchi 29 Dec '21

29 Dec '21

TCP J07094936+1412280 Large outburst amplitude of 7.7 mag. Possible WZ Sge-type object. TCP J07094936+1412280 2021 12 28.5321* 07 09 49.36 +14 12 28.0 13.6 U Gem 9 0 http://www.cbat.eps.harvard.edu/unconf/followups/J07094936+1412280.html 2021 12 28.532 Discovered by Tadashi Kojima, Tsumagoi,Gunma-ken, Japan, on three frames(5_s exp) under limiting mag.= 14.2 taken by Canon EOS 6D + 200mm f/3.2 lens. Nothing is visible at this location taken on 2021 Dec14.741 UT under limiting mag.= 14.0. Mag=13.5 on 2021 Dec28.610UT with same instrument. IDs: 070949.193 +141228.431 PS1_DR1_125051074549830046 g=21.3413(0.0423) r=21.2994(0.0307) i=21.428(0.0537) z=21.1752(0.1489) y=--(--) 070949.190 +141228.548 SDSSJ070949.18+141228.5 ObsDate=2006.9006 u=21.577(21.577) g=21.345(0.043) r=21.356(0.068) i=21.459(0.123) z=21.304(0.312) ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/af22d8bb-81c3-44e8-b855-9d97e… TCPJ07094936+1412280 20211228.095 <16.967g ASN TCPJ07094936+1412280 20211228.5321 13.6C (Tadashi Kojima)

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[vsnet-alert 26491] 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-alert 26490] 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-alert 26489] 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-alert 26488] 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-alert 26487] 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-alert December 2021