[vsnet-outburst 27364] SDSS J161909.10+135145.5: new SU UMa-type dwarf nova

Thu Jun 17 06:31:45 JST 2021

Dear colleagues,

I have just finished analysing my unfiltered CMOS observations of SDSS
J161909.10+135145.5, obtained on 2021, June 15/16 at CBA Belgium
Observatory, using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera under
moderate skies. My observations were triggered by Yutaka Maeda-san's
observation reported in [vsnet-outburst 27359].

Regular superhumps with an amplitude of 0.15 mag are visible in the
resulting (noisy) light curve, establishing SDSS J161909.10+135145.5 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 0.0510 +/- 0.0015d. The object was at mag CV = 16.1 on
June 16th.

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

Best regards
Tonny

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

PERANSO : The Light Curve and Period Analysis Software
http://www.peranso.com