[vsnet-alert 25486] CSS 111118:051923+155435 (aka CRTS J051922.9+155435) : new SU UMa-type dwarf nova

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

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of CSS 111118:051923+155435, obtained tonight 2021, Mar 02/03 at CBA Belgium Observatory using a 0.40-m f/10.0 SCT telescope and QHY268M CMOS camera, under clear skies.

Regular superhumps with an amplitude of 0.35 mag are clearly visible in the resulting light curve, establishing CSS 111118:051923+155435 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 0.0750 +/- 0.0024d. The object was at mag 16.5 (CV) on Mar 02nd.

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