[vsnet-alert 23601] ASASSN-19yg: new SU UMa-type dwarf nova (updated analysis)

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

Dear colleagues,

I have just concluded a more detailed analysis of my 2019, Oct 01/02 unfiltered CCD photometry session of ASASSN-19yg [see also vsnet-alert 23600]. Observations were made 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 0.31 mag, hence establishing ASASSN-19yg as a new SU UMa-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso),  yields a combined superhump period of 0.0583 +/- 0.0004d. The object was at mag 14.4 (CV) on Oct 01st. 

Observations will be sent to AAVSO, CBA and VSNET for further analysis. 

Follow-up observations are recommended to further study the evolution of superhumps in this system. 

Best regards
Tonny

-- 

Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com <http://www.cbabelgium.com> 
www.peranso.com <http://www.peranso.com>