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

[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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[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))

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[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.

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[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

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[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))

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[vsnet-alert 27860] FL Psc: overlooked superoutburst?
by Taichi Kato 16 Jun '23

16 Jun '23

FL Psc: overlooked superoutburst? WZ Sge star. Past one in 2004. YYYYMMDD(UT) mag observer 20230525.4220 17.388g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230530.6037 17.467g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230531.5925 10.117g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230601.4129 10.042g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230605.5825 10.373g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.1558 10.404g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.1899 10.665g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.5851 10.703g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.6005 11.570g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-alert 27859] ASASSN-19km possible superoutburst (correct object name)
by Taichi Kato 16 Jun '23

16 Jun '23

ASASSN-19km possible superoutburst (correct object name) Suspected type from ASAS-SN DB. YYYYMMDD(UT) mag observer 20230606.0287 <16.924g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.2445 <16.902g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.2473 <16.755g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.3163 <17.169g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.0528 <18.021g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.3162 <17.233g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.3175 <17.063g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230611.9834 16.684g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.0453 16.742g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230613.1207 16.741g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230613.3314 16.562g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230614.3567 16.947g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230614.3581 16.606g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.0208 16.940g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-alert 27858] ASASSN-19lm possible superoutburst
by Taichi Kato 16 Jun '23

16 Jun '23

ASASSN-19lm possible superoutburst Suspected type from ASAS-SN DB. YYYYMMDD(UT) mag observer 20230606.0287 <16.924g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.2445 <16.902g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230606.2473 <16.755g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230607.3163 <17.169g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.0528 <18.021g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.3162 <17.233g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.3175 <17.063g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230611.9834 16.684g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.0453 16.742g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230613.1207 16.741g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230613.3314 16.562g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230614.3567 16.947g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230614.3581 16.606g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.0208 16.940g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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