[vsnet-outburst 27032] CSS 111103:074400+415504 (aka CRTS J074400.5+415504): new SU UMa-type dwarf nova

Mon Apr 12 23:17:22 JST 2021

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of CSS
111103:074400+415504, obtained on 2021, Apr 11/12 at CBA Belgium
Observatory, using a 0.40-m f/10.0 telescope and QHY268M CMOS camera under
(mostly) clear skies. 

Regular superhumps with an amplitude of 0.28 mag are clearly visible in the
resulting light curve, establishing CSS 111103:074400+415504 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 0.0579 +/- 0.0014d. The object was at mag V = 16.7 on
Apr 11th.

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

Best regards
Tonny

---

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

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