- vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9027] ASASSN-15cl superoutburst
by Taichi Kato 09 Jan '22

09 Jan '22

ASASSN-15cl superoutburst YYYYMMDD(UT) mag observer 20211221.6522 <146c (Yutaka Maeda) 20211222.6448 <153c (Yutaka Maeda) 20211231.5842 <157c (Yutaka Maeda) 20220103.5890 137cG (Yutaka Maeda) 20220106.6914 136cG (Yutaka Maeda) 20220107.6407 136cG (Yutaka Maeda) 20220107.6407 136cG (Yutaka Maeda)

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[vsnet-newvar 9026] ASASSN-22ae still bright
by Taichi Kato 09 Jan '22

09 Jan '22

ASASSN-22ae still bright Large outburst amplitude. YYYYMMDD(UT) mag observer 20220107.6663 13.95V (Masayuki Moriyama) 20220107.6693 13.72B (Masayuki Moriyama) ASASSN-22ae --- ------- 4:57:3.77 -26:50:7.2 2022-01-5.15 13.13 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=16.3, g>18.3 on 2022-01-03.28, g=15.3 on 2022-01-04.04, g=13.4 on 2022-01-05.15. ASASSN-22ae 20220103.28 <183g ASN ASASSN-22ae 20220104.04 153g ASN ASASSN-22ae 20220105.15 134g ASN 045703.804 -265007.10 (2000.0) Gaia_DR2_4880708033817333120 plx=3.344(0.885) dismod=7.4 pmra=4.840(1.326) pmdec=1.360(1.611) G=20.583 BP=19.811 RP=19.787 045703.804 -265007.10 (2000.0) Gaia_EDR3_4880708033817333120 plx=1.884(0.613) dismod=8.6 pmra=3.016(0.587) pmdec=0.502(0.667) G=20.462 BP=20.184 RP=19.837

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[vsnet-newvar 9025] MASTER OT J042609.34+354144.8 superhumps
by Taichi Kato 06 Jan '22

06 Jan '22

MASTER OT J042609.34+354144.8 superhumps Kiyota-san detected large-amplitude superhumps on Jan. 4. Superhumps were apparently growing on Jan. 3.

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[vsnet-newvar 9024] ASASSN-19za possible superoutburst
by Taichi Kato 03 Jan '22

03 Jan '22

ASASSN-19za possible superoutburst Gaia22aau AT2019slj 2022-01-01 15:22:10 350.07709 49.32948 15.14 18.99 0.72 CV 2022-01-03 14:16:29 ~5 mag outburst in confirmed CV ASASSN-19za, spectrum on TNS http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22aau/ Observations on two nights during the 2019 superoutbursts.

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[vsnet-newvar 9023] MASTER OT J030227.28+191754.5: stage A superhumps, eventually
by Taichi Kato 02 Jan '22

02 Jan '22

MASTER OT J030227.28+191754.5: stage A superhumps, eventually The most recent data by Tonny Vanmunster, Tamas Tordai and Itoh-san have recorded emerging ordinary superhumps since 2021 Dec. 30 -- 32 d after the outburst detection! (The longest record, probably related to the large outburst amplitude). The period of stage A superhumps is 0.0616(2) d (2-d baseline). The period of early superhumps is 0.059851(5) d. The corresponding mass ratio is 0.076(10), which will be updated as more observations become available. This value corresponds to a "borderline" period bouncer. List of observers and numbers of measurements: Code Mode Corr SD Obs OKU B -0.401 0.051 1503 KU1 CV -0.427 0.044 19437 Van CV -0.503 0.022 512 KU1 V -0.281 0.038 8153 Ioh C -0.283 0.050 20707 Trt V -0.291 0.030 358 HaC CV -0.242 0.067 262 KU1 Ic 0.012 0.033 109 KU1 Rc -0.051 0.026 119 KU1 B -0.424 0.024 118 Kis C -0.380 0.060 1812 Vih V -0.282 0.032 242 Vih Ic -0.001 0.030 245 Trt CV -0.207 0.031 1440 RFD V -0.173 0.014 175 OKU C 12.103 0.059 1539 GCH CV -0.457 0.018 7

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[vsnet-newvar 9022] CRTS J045446.8-181214 (super?)outburst (since Dec. 29)
by Patrick Schmeer 02 Jan '22

02 Jan '22

CRTS J045446.8-181214 (UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=298372 Grzegorz Duszanowicz reports that SSS 130317:045447-181214 is bright (mag. 14.6). According to ASAS-SN Sky Patrol data the outburst started on 2021 December 28 or 29: https://asas-sn.osu.edu/sky-patrol/coordinate/a51092ff-2b3c-45d0-8d88-09d64… ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF18achtaah/ Time-resolved photometry 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 Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

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[vsnet-newvar 9020] 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-newvar 9019] 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-newvar 9018] 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-newvar 9017] 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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