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

[vsnet-alert 27972] TCP J02011347+0139431: new WZ Sge-type dwarf nova
by Taichi Kato 06 Dec '23

06 Dec '23

TCP J02011347+0139431: new WZ Sge-type dwarf nova Itoh-san and Kiyota-san detected early superhumps on two consecutive nights. Typical double-wave modulations with a period of 0.05746(5) d (full amplitude 0.06 mag).

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[vsnet-alert 27971] TCP J18414194+2153095: new SU UMa-type dwarf nova
by Taichi Kato 05 Dec '23

05 Dec '23

TCP J18414194+2153095: new SU UMa-type dwarf nova Itoh-san detected superhumps on two nights (Nov. 28 and Dec. 3). The period has not been determined due to this large gap.

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[vsnet-alert 27970] ASASSN-20pv likely superoutburst (AM CVn)
by Taichi Kato 04 Dec '23

04 Dec '23

ASASSN-20pv likely superoutburst (AM CVn) YYYYMMDD(UT) mag observer 20231203.631 132 (Rod Stubbings)

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[vsnet-alert 27969] SDSS J080249.06+363716.4 = ASASSN-23ic: new SU UMa-type dwarf nova
by Taichi Kato 27 Nov '23

27 Nov '23

SDSS J080249.06+363716.4 = ASASSN-23ic: new SU UMa-type dwarf nova Itoh-san reported observations. Although the object is currently faint (17 mag), superhumps and possible shallow eclipses were seen. The period is 0.05919(2) d. This period expresses superhumps well. Due to the limited coverage, possible eclipses fell at the same superhump phase and the orbital and superhump periods were not distinguished.

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[vsnet-alert 27968] TCP J04251906+2841462: new WZ Sge-type dwarf nova
by Taichi Kato 22 Nov '23

22 Nov '23

TCP J04251906+2841462: new WZ Sge-type dwarf nova Kiyota-san reported observations. Early superhumps with a period of 0.0539(4) d and an amplitude of 0.07 mag were present.

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[vsnet-alert 27967] TT Ari brightenning
by Pavol A. Dubovsky 18 Nov '23

18 Nov '23

I recorded TT Ari significantly brighter recently. Following are my visual observations: ARITT 20231115.060 10.80 DPV ARITT 20231116.928 10.76 DPV ARITT 20231118.128 10.41 DPV ACTIVE ARITT 20231118.135 10.37 DPV ACTIVE ARITT 20231118.159 10.32 DPV ACTIVE -- Pavol A. Dubovsky Ponta do Sol, Madeira, Portugal var.kozmos.sk

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[vsnet-alert 27966] TCP J23030178+4916384: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 16 Nov '23

16 Nov '23

Dear colleagues, I have just finished analysing my unfiltered CCD observations of TCP J23030178+4916384 (aka AT 2023xni) obtained on 2023, Nov 14/15 and Nov 15/16 at CBA Extremadura Observatory using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies. My observations were triggered by this report in TNS: https://www.wis-tns.org/object/2023xni While no clear periodic signal is present in the Nov 14/15 observations, the object clearly started showing superhumps in the light curve of Nov 15/16. The superhumps have an amplitude of 0.21 mag, establishing TCP J23030178+4916384 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 0.0662 +/- 0.0007 d. The object was at mag CV = 17.5 on Nov 16th. Another observing session of this object is currently ongoing at CBA Extremadura Observatory. 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-alert 27965] TCP J19582065+5506531: new SU UMa-type dwarf nova
by Taichi Kato 16 Nov '23

16 Nov '23

TCP J19582065+5506531: new SU UMa-type dwarf nova The most recent observations by Itoh-san (Nov. 15) showed clear superhumps (period about 0.059 d). They were developing on Nov. 14.

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[vsnet-alert 27964] TCP J20315286+2740166: ordinary superhumps
by Taichi Kato 16 Nov '23

16 Nov '23

TCP J20315286+2740166: ordinary superhumps Osaka Kyoiku U team, Kyoto U team, Itoh-san, Kiyota-san, Stephen Brincat and Tamas Tordai have reported observations. Ordinary superhumps started to appear on Nov. 12 and the current superhump period is 0.05694(7) d. The small amplitude 0.035 mag and the profile suggest that they are still in stage A.

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[vsnet-alert 27963] TCP J20315286+2740166: likely early superhumps
by Taichi Kato 06 Nov '23

06 Nov '23

TCP J20315286+2740166: likely early superhumps Osaka Kyoiku U team, Itoh-san and Stephen Brincat have reported observations. There are likely early superhumps with a period of 0.0552(2) d and an amplitude of 0.035 mag. The baseline is still short and the result is preliminary.

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