January 2022 - 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 26548] Re: ASASSN-20pv: no major variations yet
by Taichi Kato 04 Feb '22

04 Feb '22

> Observations on Jan 20 showed a transition to the early modulation with > 'growing' superhumps of still small amplitude and a hint of a 0.0095d alt. > 0.019d period around a mean magnitude of 12.49CR. Ordinary superhumps, yes. The amplitudes were too small to be directly visible in Hambsch's data.

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[vsnet-alert 26531] TCP J07094936+1412280: appearance of ordinary superhumps
by 反保雄介 01 Feb '22

01 Feb '22

TCP J07094936+1412280: appearance of ordinary superhumps Kiyota-san, Itoh-san, Tonny Vanmunster, Stephen M. Brincat, Sano-san, Tamás Tordai, and Kyoto Univ. Obs. have reported further observations of TCP J07094936+1412280. The data on 15th Jan at Kyoto Univ. Obs. showed clear ordinary superhumps with an amplitude of ~0.15 mag. The baseline was still too short to determine its period. Continuous observations are encouraged. Best, Yusuke

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[vsnet-alert 26552] QZ Vir outburst
by Rod Stubbings 31 Jan '22

31 Jan '22

QZ Vir outburst VIRQZ 220130.576 156 VIRQZ 220131.568 98 -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-alert 26551] ASASSN-22ax: new SU UMa-type dwarf nova
by Taichi Kato 30 Jan '22

30 Jan '22

ASASSN-22ax: new SU UMa-type dwarf nova Stephen Brincat, Itoh-san and Kiyota-san have reported observations. Since Jan. 26, this object has shown superhumpss with a period of 0.06114(7) d and an amplitude of 0.22 mag. Superhumps were not apparent up to Jan. 24.

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[vsnet-alert 26550] ASASSN-22as: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 28 Jan '22

28 Jan '22

Dear colleagues, I have been collecting unfiltered CCD observations of ASASSN-22as over the past 11 nights at CBA Extremadura Observatory, using a 0.40-m f/5.1 telescope and SX-46 CCD camera under mostly clear skies. The collected light curves did not show obvious periodic modulations, with the exception of last night Jan 27/28, 2022. Regular superhumps with an amplitude of 0.24 mag are finally visible, establishing ASASSN-22as as a new SU UMa-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined superhump period of 0.0651 +/- 0.0007d. The object was at mag CV = 16.4 on Jan 28th. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.com PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com

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[vsnet-alert 26549] RZ Leo: rapid fading
by Junpei Ito 27 Jan '22

27 Jan '22

RZ Leo: rapid fading Further time-resolved observation has been reported by Itoh-san, Kiyota-san, Osaka Kyoiku U. team, Shawn Dvorak, Tamás Tordai, Stephen M.Brincat, Filipp Romanov, Vihorlat Observatory team, and Kyoto U. team. According to Stephen M.Brincat's data at 2022-01-27 00:02 UT, this object is 15.4 mag and ~1mag fainter than on 2022-01-26. Therefore, this object can be in rapid fading now. In the 2001 superoutburst, rebrightening was observed, short-lasting (type-C) rebrightening (Ishioka et al. 2001). In order to check the rebrightening profile, daily snapshots are encouraged. Best regards, Junpei

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[vsnet-alert 26547] MASTER OT J030227.28+191754.5: rapid fading
by Junpei Ito 24 Jan '22

24 Jan '22

MASTER OT J030227.28+191754.5: rapid fading The most recent data by Itoh-san, Osaka Kyoiku U. team, Tamás Tordai, Tonny Vanmunster, Josch Hambsch, Vihorlat Observatory team, Filipp Romanov, Shawn Dvorak, Alexandra M.Zubareva, and Kyoto U. team have reported time-resolved photometry and this object is still in outburst. This object is 15.969 mag with clear filter at 2022-01-22 14:47 UT. According to a quick look reported by Kyoto U. team at 2022-01-24 09:21 UT, this object is 16.62(7) mag with clear filter. Therefore, this object can be in rapid fading now. This object has the largest outburst amplitude and may show unique rebrightening. Daily snapshots are encouraged in order to check rebrightening. And once rebrightening appears, time-resolved observations are encouraged. Best regards, Junpei

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[vsnet-alert 26544] ASASSN-20pv: no major variations yet
by Taichi Kato 24 Jan '22

24 Jan '22

ASASSN-20pv: no major variations yet Josch Hambsch reported observations on two nights. No major variations were found. The object may be currently in early superhump phase.

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