[vsnet-alert 23623] PGIR19bra = AT 2019qqk = ZTF19abzpkss: new SU UMa-type dwarf nova

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

Dear colleagues,

I have just concluded the analysis of my 2019, Oct 09/10 unfiltered CCD photometry session of PGIR19bra = AT 2019qqk = ZTF19abzpkss [see also ATEL #13178]. 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 0.32 mag, hence establishing PGIR19bra 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 0.0538 +/- 0.0003d. The object was at mag 17.0 (CV) on Oct 09th. 

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

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