[vsnet-alert 25143] CSS 080921:010522+110253: new SU UMa-type dwarf nova

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

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of CSS 080921:010522+110253, obtained on 2020, Dec 18/19 at CBA Extremadura Observatory and on Dec 20/21 at CBA Belgium Observatory, each time using a 0.40-m telescope.

Regular superhumps with an amplitude of 0.20 mag are clearly visible in the resulting light curve, establishing CSS 080921:010522+110253 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, release end of December), yields a combined superhump period of 0.0679 +/- 0.0010d. The object was at mag 16.0 (CV) on Dec 20th.

I will send my observations (currently large backlog) to AAVSO, CBA and VSNET for further analysis.

Best regards
Tonny

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