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

[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.

1 0

[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.

1 0

[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.

1 0

[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.

1 0

[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)

1 0

[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))

1 0

[vsnet-alert 27864] KK Tel likely superoutburst
by Taichi Kato 19 Jun '23

19 Jun '23

KK Tel likely superoutburst (Known SU UMa star. Combined magnitudes for ASAS-SN DB) YYYYMMDD(UT) mag observer 20230613.1852 14.825g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230614.3301 15.315g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.3359 14.860g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230616.538 138 (Rod Stubbings) 20230617.1494 13.582g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230617.2622 13.84cG (Masao Funada) 20230618.1379 13.984g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

1 0

[vsnet-alert 27863] Re: FL Psc: overlooked superoutburst?
by Taichi Kato 19 Jun '23

19 Jun '23

Re: FL Psc: overlooked superoutburst? According to observations by Josch Hambsch, no strong superhumps were observed (fading around 11.5-12.0 mag). It is rather strange that the same object showed prominent superhumps already at 11.0-11.5 in 2004.

1 0

[vsnet-alert 27862] TCP J17321088+0807243: new SU UMa-type (or WZ Sge-type) dwarf nova
by tonny.vanmunster＠gmail.com 18 Jun '23

18 Jun '23

Dear colleagues, I have just finished analysing my unfiltered CMOS observations of TCP J17321088+0807243 obtained on 2023, Jun 15/16 and June 16/17 at CBA Belgium Observatory using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera under clear skies. My observations were triggered by Taichi Kato's post in vsnet-alert 27850. The resulting light curve clearly shows the presence of superhumps with an amplitude of 0.32 mag, establishing TCP J17321088+0807243 as either a new SU UMa-type or WZ Sge-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 0.0612 +/- 0.0011d. The object was at mag CV = 17.0 on Jun 17th. Image calibration and photometry were done using a beta version of Phoranso. 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 PHORANSO: Photometric Reduction and Analysis Software *** NEW - in beta mode *** http://www.phoranso.com

1 0

[vsnet-alert 27861] V544 Her still bright
by Taichi Kato 16 Jun '23

16 Jun '23

V544 Her still bright The brightness is comparable to the 2021 double outburst. YYYYMMDD(UT) mag observer 20230608.2390 <169C (Masao Funada) 20230608.2901 <17.744g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230609.5306 <152c (Yutaka Maeda) 20230609.6553 168:C (Masayuki Moriyama) 20230612.2859 <18.052g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.6157 <160C (Masayuki Moriyama) 20230613.2993 16.514g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230613.6995 152C (Masayuki Moriyama) 20230614.1628 14.689g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230614.2150 14.813g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230614.6568 151C (Masayuki Moriyama) 20230615.2860 14.926g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

1 0