- vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 17485] TCP J19470832-0924198: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 16 Aug '24

16 Aug '24

Dear colleagues, I have just finished analysing my unfiltered CCD observations of TCP J19470832-0924198, obtained on 2024, Aug 13/14 at CBA Extremadura Observatory 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 superhumps with an amplitude of 0.30 mag, establishing TCP J19470832-0924198 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 superhump period of 0.0565 +/- 0.0012d. The object was at mag CV = 15.0 on Aug 13th. Image calibration and photometry were done using my new photometry software Phoranso 1.0.4.6 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.co <http://www.cbabelgium.com/> m PERANSO : The Light Curve and Period Analysis Software http://www.peranso.co <http://www.peranso.com/> m PHORANSO: Photometric Reduction and Analysis Software *** NEW *** http://www.phoranso.com <http://www.phoranso.com/>

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[vsnet-campaign-dn 17484] You have selected
by rpvmedtxqm 07 Aug '24

07 Aug '24

f you did not make this request, you can ignore this email

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[vsnet-campaign-dn 17483] ASASSN-24cg (aka Gaia DR3 4378710224740797312): new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 04 Apr '24

04 Apr '24

Dear colleagues, I have just finished analysing my unfiltered CCD observations of ASASSN-24cg (aka Gaia DR3 4378710224740797312 and TCP J16454549-0257144) obtained on 2024, Apr 03/04 at CBA Extremadura Observatory 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 superhumps with an amplitude of 0.34 mag, establishing ASASSN-24cg as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle, Lomb-Scargle GLS and PDM methods (Peranso 3.0) yields a combined superhump period of 0.0613 +/- 0.0007d. The object was at mag CV = 13.5 on Apr 4th. 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 With kind regards, Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.co <http://www.cbabelgium.com/> m PERANSO : The Light Curve and Period Analysis Software http://www.peranso.co <http://www.peranso.com/> m PHORANSO: Photometric Reduction and Analysis Software *** NEW - COMING SOON *** http://www.phoranso.com <http://www.phoranso.com/>

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[vsnet-campaign-dn 17482] TCP J03383192+2712288: new SU UMa-type (or WZ Sge-type) dwarf nova
by tonny.vanmunster＠gmail.com 11 Mar '24

11 Mar '24

Dear colleagues, I have just finished analysing my unfiltered CMOS observations of TCP J03383192+2712288 obtained on 2024, Mar 08/09 at CBA Belgium Observatory using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera, and on 2024, Mar 10/11 at CBA Extremadura Observatory using a 0.40-m f/5.1 telescope and SX-46 CCD camera. In both cases, skies were not entirely clear. The resulting light curve clearly shows the presence of superhumps with an amplitude of 0.24 mag, establishing TCP J03383192+2712288 as a new SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle, Conditional Entropy and PDM methods (Peranso 3.0) yields a combined superhump period of 0.0542 +/- 0.0010d. The object was at mag CV = 16.4 on Mar 10th. 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.co <http://www.cbabelgium.com/> m PERANSO : The Light Curve and Period Analysis Software http://www.peranso.co <http://www.peranso.com/> m PHORANSO: Photometric Reduction and Analysis Software *** NEW - COMING SOON *** http://www.phoranso.com <http://www.phoranso.com/>

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[vsnet-campaign-dn 17481] IK Leo: superhumps
by Taichi Kato 04 Mar '24

04 Mar '24

IK Leo: superhumps Itoh-san has shown that this object started showing superhumps on Mar. 2. There was some indication of growing superhumps earlier.

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[vsnet-campaign-dn 17480] TCP J13530185+0522000: new SU UMa-type (likely WZ Sge) dwarf nova
by Taichi Kato 04 Mar '24

04 Mar '24

TCP J13530185+0522000: new SU UMa-type (likely WZ Sge) dwarf nova Itoh-san has shown that this object started showing superhumps on Mar. 2. The current period is 0.06041(4) d. The amplitude is 0.13 mag. The long waiting time suggests a WZ Sge star.

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[vsnet-campaign-dn 17479] TCP J12584767-0849071 multiple rebrightenings
by Taichi Kato 19 Feb '24

19 Feb '24

TCP J12584767-0849071 multiple rebrightenings Pointed out by Moriyama-san. YYYYMMDD(UT) mag observer 20240207.674 19.49C (Hiroshi Itoh) 20240209.8617 <168C (Masayuki Moriyama) 20240211.8582 16.60C (Masayuki Moriyama) 20240212.8399 <171C (Masayuki Moriyama) 20240213.4672 17.861zr (ZTF Alert DC mag (Masci+ 2019)) 20240215.4598 15.365zr (ZTF Alert DC mag (Masci+ 2019)) 20240216.8475 16.39C (Masayuki Moriyama) 20240217.8527 <167C (Masayuki Moriyama)

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[vsnet-campaign-dn 17478] Wils_SDSSJ091741.29+073647.4 rebrightening
by Taichi Kato 14 Feb '24

14 Feb '24

Wils_SDSSJ091741.29+073647.4 rebrightening Noted by Moriyama-san. Likely multiple rebrightenings of a WZ Sge star. YYYYMMDD(UT) mag observer 20240123.2047 <17.091g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20240124.2119 <17.124g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20240124.7493 <157C (Masayuki Moriyama) 20240125.6942 <163C (Masayuki Moriyama) 20240127.753 <172C (Hiroshi Itoh) 20240128.601 <172C (Hiroshi Itoh) 20240129.1981 16.765g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20240129.7043 15.62C (Masayuki Moriyama) 20240207.6562 16.00C (Masayuki Moriyama) 20240209.6497 <174C (Masayuki Moriyama) 20240211.6892 <179C (Masayuki Moriyama) 20240212.6605 17.39C (Masayuki Moriyama)

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[vsnet-campaign-dn 17477] ASASSN-24ah rebrightening
by Taichi Kato 13 Feb '24

13 Feb '24

ASASSN-24ah rebrightening WZ Sge star with a dip before the main superoutburst. YYYYMMDD(UT) mag observer 20240131.780 155CV (Klaus Wenzel) 20240201.772 163CV (Klaus Wenzel) 20240204.381 18.10C (Hiroshi Itoh) 20240205.746 190:CV (Klaus Wenzel) 20240207.5869 <184C (Masayuki Moriyama) 20240208.6529 <180C (Masayuki Moriyama) 20240211.747 167CV (Klaus Wenzel)

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[vsnet-campaign-dn 17476] TCP J07593036+0459025: new SU UMa-type dwarf nova
by Taichi Kato 31 Jan '24

31 Jan '24

TCP J07593036+0459025: new SU UMa-type dwarf nova According to the observations by Itoh-san, this object showed clear superhumps on Jan. 28 (not very apparent on preceding nights). The period is about 0.06 d. Josch Hambsch also detected superhumps on Jan. 29.

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