[vsnet-outburst 26224] Re: ASASSN-20pl: likely a new WZ Sge-type dwarf nova

[Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-outburst]

All,

 

I collected 3.5hrs of unfiltered CCD photometry of ASASSN-20pl last night using my CBA Extremadura 0.40-m f/5.1 telescope under clear skies. The resulting light curve is shown below, as well as the detrended light curve (zoomed-in on Y axis). There are multiple small-amplitude irregular, and apparently aperiodic, modulations in the light curve. I tried several period analysis methods using Peranso 3.0, but none of them produce a significant period (way too high FAP = False Alarm Probability values). The likely WZ Sge-type classification mentioned in [vsnet-outburst 26222] seems premature, and more observations are needed to establish the nature of this variable star.

Best regards

Tonny 

 

--

Tonny Vanmunster

CBA Belgium Observatory

CBA Extremadura Observatory

 <http://www.cbabelgium.com> www.cbabelgium.com

www.peranso.com <http://www.peranso.com> 





 

 

 

From: vsnet-outburst [mailto:vsnet-outburst-bounces at ooruri.kusastro.kyoto-u.ac.jp] On Behalf Of ????
Sent: woensdag 9 december 2020 20:18
Cc: vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp; vsnet-newvar at ooruri.kusastro.kyoto-u.ac.jp; vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp
Subject: [vsnet-outburst 26222] ASASSN-20pl: likely a new WZ Sge-type dwarf nova

 

ASASSN-20pl: likely a new WZ Sge-type dwarf nova

 

We, Kyoto Univ. Obs. observed ASASSN-20pl for ~ 2 hrs and detected a double-peaked profile with the amplitude of ~0.04 mag, which can be an early superhump.

 

Still need more observations to confirm this variation as early superhumps and determine the period.

 

Best, 

Yusuke

 

2020年12月9日(水) 7:53 Patrick Schmeer pasc1312-aavso at yahoo.de <mailto:pasc1312-aavso at yahoo.de>  via vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp <mailto:vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> >:

ASASSN-20pl = TCP J03360414+4924332  (UG:)
https://www.aavso.org/vsx/index.php?view=detail.top <https://www.aavso.org/vsx/index.php?view=detail.top&oid=2214308> &oid=2214308

Time-resolved photometry is required.

Clear skies,
Patrick




 

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京都大学大学院理学研究科宇宙物理学教室　M2

Kyoto University, Graduate School of Department of Astronomy, M2

反保 雄介　Yusuke TAMPO

MAIL: tampo at kusastro.kyoto-u.ac.jp <mailto:tampo at kusastro.kyoto-u.ac.jp> 

 

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