November 2022 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27039] GX Cas (UGSU) outburst
by Kirill Sokolovsky 20 Aug '23

20 Aug '23

The UGSU-type dwarf nova GX Cas is in outburst according to NMW survey photometry (135mm f/2.0 lens + unfiltered ST-8300M CCD): 2022-11-13.7397 2459897.2397 13.4 CV AAVSO observer KLO reports visual observation of this outburst: 2022-11-12.9520 2459896.4520 13.6 Vis. ASAS-SN photometry (latest observation is quiescence on 2022-11-12.165): https://asas-sn.osu.edu/sky-patrol/coordinate/7c8f8333-01a3-49aa-ba14-08b07… VSX record for GX Cas https://www.aavso.org/vsx/index.php?view=detail.top&oid=6537 Best wishes, Kirill Sokolovsky, Stanislav Korotkiy, Olga Smolyankina, Anna Prokudina, Sergei Ostapenko

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[vsnet-alert 27153] TCPJ04343348+0411387 another rebrightening
by Taichi Kato 01 Dec '22

01 Dec '22

TCPJ04343348+0411387 another rebrightening At least four rebrightenings have been detected. YYYYMMDD(UT) mag observer 20221118.3580 19.703zr (ZTF Alert DC mag (Masci+ 2019)) 20221120.2571 17.427zg (ZTF Alert DC mag (Masci+ 2019)) 20221120.3359 17.614zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27152] ZTF18acrverw superoutburst
by Taichi Kato 01 Dec '22

01 Dec '22

ZTF18acrverw superoutburst YYYYMMDD(UT) mag observer 20221123.3413 16.388zg (ZTF Alert DC mag (Masci+ 2019)) 20221123.4407 16.601zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-alert 27151] AQ CMi superhumps
by Taichi Kato 01 Dec '22

01 Dec '22

AQ CMi superhumps Filipp Romanov, Itoh-san and Josch Hambsch have reported observations. The superhump period of 0.06613(2) d was obtained. This object was not well observed (on the contrary to what one might presume) during past superoutbursts and it is still worth observing.

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[vsnet-alert 26797] ASASSN-22ho: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 29 Nov '22

29 Nov '22

Dear colleagues, I have just finished analysing my unfiltered CCD observations of ASASSN-22ho, obtained on 2022, June 02/03 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and QHY-286M CMOS camera under clear skies. Regular superhumps with an amplitude of 0.35 mag are very clearly visible in the resulting light curve, establishing ASASSN-22ho 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 (long) superhump period of 0.0902 +/- 0.0025d. The object was at mag CV = 16.5 on Jun 03rd. 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 27149] RomanovV22 outburst
by Taichi Kato 28 Nov '22

28 Nov '22

RomanovV22 outburst Subtype unknown. YYYYMMDD(UT) mag observer 20220927.8080 <165C (Masayuki Moriyama) 20221104.7329 <168C (Masayuki Moriyama) 20221120.8859 <152C (Masayuki Moriyama) 20221126.8663 166:C (Masayuki Moriyama)

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[vsnet-alert 27148] PY Per brightening?
by Taichi Kato 28 Nov '22

28 Nov '22

PY Per brightening? If confirmed, this would be the first outburst during the current long-lasting faint state. YYYYMMDD(UT) mag observer 20221112.908 <147 (Gary Poyner) 20221113.8542 <141 (Eddy Muyllaert) 20221115.024 <147 (Gary Poyner) 20221115.7282 <149c (Yutaka Maeda) 20221117.8965 <141 (Eddy Muyllaert) 20221119.8056 <172C (Masayuki Moriyama) 20221123.5820 <158c (Yutaka Maeda) 20221124.5919 <154c (Yutaka Maeda) 20221126.5845 149:cG (Yutaka Maeda)

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[vsnet-alert 27147] V550 Cyg outburst
by Taichi Kato 28 Nov '22

28 Nov '22

V550 Cyg outburst Known SU UMa star. Hiraga-san has pointed out that the identification on the AAVSO chart is wrong. Not a nearby 17-mag star. YYYYMMDD(UT) mag observer 20221119.5878 <161C (Masayuki Moriyama) 20221121.5133 <152c (Yutaka Maeda) 20221122.857 17.40C (Gary Poyner) 20221122.8570 16.86C (Masao Funada) 20221124.5626 153C (Masayuki Moriyama) 20221125.415 160C (Mitsutaka Hiraga) 20221126.5632 <156C (Masayuki Moriyama)

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[vsnet-alert 27146] CRTSJ063437.9+412047 superoutburst
by Taichi Kato 28 Nov '22

28 Nov '22

CRTSJ063437.9+412047 superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221114.3604 20.290zr (ZTF Alert DC mag (Masci+ 2019)) 20221115.6849 <159c (Yutaka Maeda) 20221121.6882 153:c (Yutaka Maeda) 20221123.617 159C (Mitsutaka Hiraga) 20221123.6529 <140c (Yutaka Maeda) 20221124.590 163C (Mitsutaka Hiraga) 20221124.6625 <158c (Yutaka Maeda) 20221126.6555 <157c (Yutaka Maeda) 20221126.748 167C (Mitsutaka Hiraga)

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[vsnet-alert 27145] GZ Cnc possible superoutburst
by Taichi Kato 28 Nov '22

28 Nov '22

GZ Cnc possible superoutburst Good location and would be an easy target for time-resolved photometry. YYYYMMDD(UT) mag observer 20221120.8402 168C (Masayuki Moriyama) 20221121.2666 16.15C (Masao Funada) 20221121.4201 16.215zg (ZTF Alert DC mag (Masci+ 2019)) 20221121.8314 <160c (Yutaka Maeda) 20221124.7911 <143c (Yutaka Maeda) 20221126.7917 125cG (Yutaka Maeda) 20221126.7917 125cG (Yutaka Maeda) 20221126.8948 128C (Masayuki Moriyama)

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vsnet-alert November 2022