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

[vsnet-newvar 9016] 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-newvar 9015] ZTF19abrqett: IW And-like phenomenon
by Taichi Kato 21 Dec '21

21 Dec '21

ZTF19abrqett: IW And-like phenomenon There was only one short fading in the ZTF data in 2020 July. The object brightened before and after this event and it is most likely a disk-instability phenomenon similar to an IW And-type dip, not VY Scl phenomenon.

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[vsnet-newvar 9014] ZTF19acqxtql: outbursts from an intermediate polar?
by Taichi Kato 21 Dec '21

21 Dec '21

ZTF19acqxtql: outbursts from an intermediate polar? ZTF data show two outbursts in 2019 Nov. They were only 8 d apart and no other outbursts were detected. The fading rates were very rapid (2 mag/d) and they look like IP outbursts.

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[vsnet-newvar 9013] 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-newvar 9012] 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-newvar 9011] 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-newvar 9010] ASASSN-21vv
by Taichi Kato 07 Dec '21

07 Dec '21

ASASSN-21vv ASASSN-21vv --- ------- 3:44:15.99 22:7:9.2 2021-12-5.16 14.9 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=21.5, g>17.9 on 2021-12-04.27, g=15.2 on 2021-12-05.16, g=15.4 on 2021-12-06.06, g=15.4 on 2021-12-06.27 ASASSN-21vv 20211204.27 <179g ASN ASASSN-21vv 20211205.16 152g ASN ASASSN-21vv 20211206.06 154g ASN ASASSN-21vv 20211206.27 154g ASN

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[vsnet-newvar 9009] ZTF J210411.01-010202.3 = Gaia21fhx: superoutburst of AM CVn star?
by Taichi Kato 06 Dec '21

06 Dec '21

ZTF J210411.01-010202.3 = Gaia21fhx: superoutburst of AM CVn star? Josch Hambsch have reported observations. The object gradually faded from Nov. 28 to Dec. 4, then followed by sudden fading by 1.8 mag on the next night. This fading rate is too large for a hydrogen-rich dwarf nova. This object may be an AM CVn star (or EI Psc star) and further observations are encouraged.

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[vsnet-newvar 9008] CTCVJ1940-4724
by Taichi Kato 04 Dec '21

04 Dec '21

CTCVJ1940-4724 likely superoutburst http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21fjv/ Gaia21fjv AT2020qvc 2021-12-01 14:29:06 295.15681 -47.41402 13.32 16.12 1.02 CV 2021-12-03 11:07:56 outburst in known CV CTCV J1940-4724

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[vsnet-newvar 9007] CRTS J072144.5+663838 likely superoutburst
by Taichi Kato 04 Dec '21

04 Dec '21

CRTS J072144.5+663838 likely superoutburst (Relatively short supercycle) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21fjy/ Gaia21fjy AT2021agbm 2021-12-01 23:21:00 110.43524 66.64385 15.57 17.63 0.91 CV 2021-12-03 11:08:16 outburst in confirmed CV CSS111124:072144+663838

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