February 2023 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27379] CRTSJ141002.2-124809 possible superoutburst
by Taichi Kato 06 Feb '23

06 Feb '23

CRTSJ141002.2-124809 possible superoutburst Likely SU UMa star from ZTF data. YYYYMMDD(UT) mag observer 20221224.5278 19.951zg (ZTF Alert DC mag (Masci+ 2019)) 20230124.5403 20.437zg (ZTF Alert DC mag (Masci+ 2019)) 20230202.4168 16.039zr (ZTF Alert DC mag (Masci+ 2019)) 20230202.5385 16.030zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27378] ASASSN-20kl outburst
by Taichi Kato 06 Feb '23

06 Feb '23

ASASSN-20kl outburst Likely SU UMa star from ZTF data. YYYYMMDD(UT) mag observer 20230108.8889 <180C (Eddy Muyllaert) 20230203.1553 16.938zg (ZTF Alert DC mag (Masci+ 2019)) 20230203.1834 16.969zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27377] GO Com superoutburst
by Taichi Kato 06 Feb '23

06 Feb '23

GO Com superoutburst Itoh-san detected already developed superhumps.

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[vsnet-alert 27376] Re: UGWZ star CRTSJ174033.4+414756 outburst!
by Taichi Kato 05 Feb '23

05 Feb '23

Re: UGWZ star CRTSJ174033.4+414756 outburst! > I didn't realize the classification had changed. I will change my list > immediately. No special need. This object indeed underwent a WZ Sge-type superoutburst in 2013.

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[vsnet-alert 27374] Re: UGWZ star CRTSJ174033.4+414756 outburst!
by Taichi Kato 05 Feb '23

05 Feb '23

Re: UGWZ star CRTSJ174033.4+414756 outburst! This is an EI Psc star. Another superoutburst in 2018. Not seen in outburst in ZTF data.

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[vsnet-alert 27372] GO Com outburst!
by 前田豊 05 Feb '23

05 Feb '23

COMGO 20230204254715 133cGMdy Mdy Nagasaki Japan

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[vsnet-alert 27370] ASASSN-17qh likely superoutburst
by Taichi Kato 04 Feb '23

04 Feb '23

ASASSN-17qh likely superoutburst (Known SU UMa star) Funada-san detected an outburst at 13.4 on Feb. 3.

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[vsnet-alert 27369] IY UMa faint? superoutburst
by Taichi Kato 02 Feb '23

02 Feb '23

IY UMa faint? superoutburst Kiyota-san detected superhumps and eclipses. YYYYMMDD(UT) mag observer 20230127.842 <133 (Tsuneo Horie) 20230128.828 <136 (Tsuneo Horie) 20230129.844 <136 (Tsuneo Horie) 20230130.6751 140cG (Yutaka Maeda) 20230130.6751 140cG (Yutaka Maeda) 20230130.826 <136 (Tsuneo Horie) 20230130.9771 144 (Eddy Muyllaert)

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[vsnet-alert 27368] PNVJ06245297+0208207: fading from superoutburst plateau
by Taichi Kato 02 Feb '23

02 Feb '23

PNVJ06245297+0208207: fading from superoutburst plateau The object started fading rather rapidly on Jan. 31 (Itoh-san, Kiyota-san and Kyoto U. team). The object reached about 15.5 mag on Feb. 1 (Itoh-san). The superhump period during the superoutburst plateau (up to Jan. 30) was 0.033372(5) d. Observers were Kyoto U. team, Itoh-san, Kiyota-san, Crimean Astrophys. Obs. team and Josch Hambsch). This may be shorter than the orbital period (see Kato 2022 arXiv:2201.02945). The evolution of the outburst in this system is very similar to SDSS J090221.35+381941.9 and it would brighten again to a plateau phase. Have a look at the paper. https://ui.adsabs.harvard.edu/abs/2014PASJ...66L...7K/abstract Continued observations are requested.

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[vsnet-alert 27367] CRTS J141712.0-180328: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 02 Feb '23

02 Feb '23

Dear colleagues, I have just finished analysing my unfiltered CCD observations of CRTS J141712.0-180328 (aka CSS 080425:141712-180328) obtained on 2023, Jan 31/Feb 01 at CBA Extremadura Observatory (Spain) using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies. The resulting light curve clearly shows the presence of regular superhumps with an amplitude of 0.17 mag, establishing CRTS J141712.0-180328 as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Generalized-Lomb-Scargle, PDM and Conditional Entropy methods (Peranso 3.0) yields a combined superhump period of 0.0853 +/- 0.0038d. The object was at mag CV = 14.6 on Jan 31st. 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> http://www.cbabelgium.com PERANSO: The Light Curve and Period Analysis Software http://www.peranso.com

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vsnet-alert February 2023