[vsnet-outburst 25544] CSS 110115:003304+380106: new SU UMa-type dwarf nova

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

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of CSS 110115:003304+380106 (aka CRTS J003304.0+380106), obtained tonight 2020, Aug 18/19 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and ST-3200ME CCD camera under clear skies. My observations were triggered by [vsnet-outburst 25538], suggesting the possible SU UMa-nature of this object.

Large amplitude superhumps (0.25 mag) are clearly visible in my CCD observations, establishing CSS 110115:003304+380106 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, under development), yields a combined long superhump period of 0.0799 +/- 0.0024d. The object was at mag 15.6 (CV) on Aug 19th.

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

Follow-up observations are recommended to refine the superhump period.

Best regards
Tonny

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