June 2023 - 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 27873] ASASSN-23es: SU UMa-type dwarf nova
by Taichi Kato 26 Jun '23

26 Jun '23

ASASSN-23es: SU UMa-type dwarf nova Josch Hambsch has reported observations. Due to the relatively large scatter (probably due to unfavorable weather) and sparse sampling, it was difficult to detect superhumps. An analysis using the entire data yielded a period of 0.07211(3) d (amplitude 0.11 mag).

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[vsnet-alert 27872] Re: FL Psc started showing superhumps
by Taichi Kato 22 Jun '23

22 Jun '23

Re: FL Psc started showing superhumps > According to observations by Josch Hambsch, this object > started to show ordinary superhumps on June 21 at 12.0 mag, > later than in 2004. This may be the start of stage C superhumps rather than appearance of superhumps. The current outburst had a peak magnitude of 9.7 on June 1. YYYYMMDD(UT) mag observer 20230530.6037 17.467g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230530.6037 <16.982g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230530.6050 <16.977g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230530.6062 <16.854g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230531.5925 10.117g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230531.5925 10.147g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230531.5938 10.147g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230531.5950 10.131g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230601.4129 10.042g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230601.4130 9.673g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230601.4142 9.368g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230601.4155 9.376g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230603.6127 9.942g (ASAS-SN survey (Shappee+2014; Kochanek+2017)) 20230603.6140 9.921g (ASAS-SN survey (Shappee+2014; Kochanek+2017))

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[vsnet-alert 27871] BraTS-SON-T2-046 = TCPJ17294472-4236232: superhump period
by Taichi Kato 22 Jun '23

22 Jun '23

BraTS-SON-T2-046 = TCPJ17294472-4236232: superhump period Period 0.06166(1) d. Amplitude 0.10 mag. Observers: Josch Hambsch and Peter Starr If this is indeed a WZ Sge star, multiple rebrightenings are expected for this superhump period.

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[vsnet-alert 27870] AS Pav superhump period
by Taichi Kato 22 Jun '23

22 Jun '23

AS Pav superhump period Period 0.0900(3) d. Amplitude 0.14 mag. Observer: Josch Hambsch. The object already enter the rapid fading phase.

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[vsnet-alert 27869] TCP J17321088+0807243 superhump period
by Taichi Kato 22 Jun '23

22 Jun '23

TCP J17321088+0807243 superhump period Period 0.06103(4) d. Amplitude 0.19 mag. Observers: Tonny Vanmunster, Itoh-san, Kiyota-san and Josch Hambsch.

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[vsnet-alert 27868] FL Psc started showing superhumps
by Taichi Kato 22 Jun '23

22 Jun '23

FL Psc started showing superhumps According to observations by Josch Hambsch, this object started to show ordinary superhumps on June 21 at 12.0 mag, later than in 2004.

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[vsnet-alert 27867] V544 Her faded, but
by Taichi Kato 21 Jun '23

21 Jun '23

V544 Her faded, but According to observations by Itoh-san on June 20, V544 Her faded to 16th mag. It is still unknown whether this means fading to quiescence or a dip which will be followed by rebrightening. Please continue your observations. I haven't been able to detect a periodic signal from observations up to June 18.

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[vsnet-alert 27866] ES Aql fading
by Taichi Kato 20 Jun '23

20 Jun '23

ES Aql fading YYYYMMDD(UT) mag observer 20230307.8541 117:cG (Yutaka Maeda) 20230421.7890 119cG (Yutaka Maeda) 20230430.6832 120cG (Yutaka Maeda) 20230515.6804 121cG (Yutaka Maeda) 20230523.6556 123cG (Yutaka Maeda) 20230619.5552 13.25V (Minoru Sato)

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[vsnet-alert 27865] V551 Sgr possible superoutburst
by Taichi Kato 19 Jun '23

19 Jun '23

V551 Sgr possible superoutburst (Known SU UMa star. Combined magnitudes for ASAS-SN DB) YYYYMMDD(UT) mag observer 20230615.0667 15.844g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230616.0527 15.721g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230616.6708 146C (Masayuki Moriyama) 20230617.2630 14.262g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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