[vsnet-alert 24608] ASASSN-20jx rapidly fading on Aug. 30

Mon Aug 31 00:23:18 JST 2020

 ASASSN-20jx (UGSU - or UGWZ?)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=1546206

Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S
and Kochanek et al. 2017PASP..129j4502K) light curve and data:
https://asas-sn.osu.edu/light_curves/c71f5ae6-8edd-4f5f-be67-71e94dce5bb1

ZTF light curve:
https://lasair.roe.ac.uk/object/ZTF20abrubfr/

Further time-resolved photometry is encouraged.

Clear skies,
Patrick
-------
     Am Samstag, 22. August 2020, 21:54:58 MESZ hat Tonny Vanmunster tonny.vanmunster at gmail.com via vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  

 Dear colleagues,

I have just finished analysing my unfiltered CCD observations of ASASSN-20jx, obtained last night 2020, Aug 21/22 at CBA Extremadura Observatory, using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies. 

Superhumps with an amplitude of 0.16 mag are clearly visible, establishing ASASSN-20jx 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, under development), yields a combined superhump period of 0.0601 +/- 0.0003d. The object was at mag 16.2 (CV) on Aug 22nd.

I will send my observations to AAVSO, CBA and VSNET for further analysis.

Follow-up observations are recommended to refine the superhump period.

Best regards
Tonny

--
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com
www.peranso.com